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Djerk Geurts
7 assignments
IP Nexia, Maizymoo Limited
DevOps & Security Consultant, Director
Harpenden, England, United Kingdom
Not looking for work
Remote work
Not available
DevOps & Security Consultant
IP Nexia (via Maizymoo Limited): IT Security, IT Networks, IT Infrastructure, DevOps
Telecommunications company - Service Provider, ISP, Mobile
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Apr 2021 - Present, Belgium (remote)

About the role

Complete revamp of all IT systems following a security breach. Implemented new:

  • IdM and Policy management using FreeIPA
    • LDAP auth to all internal system
    • Keycloak SSO
    • Kong API-gateway
    • CA: SSL management
  • DNS using PowerDNS and DNSdist (authoritative & recursive with RPZ filtering)
    • Internal RPZ feed server
    • VoIP ENUM service
  • NTP
  • Managed database clusters (Galera/MySQL, PostgreSQL & MongoDB)
  • Internal smarthost based Email forwarding
  • ELK stack
    • Implemented Logstash and Auditbeat data collection
  • TIG stack
    • Created dashboards for various systems and services (vSphere, PowerDNS, FreeRadius, pfSense etc.)
  • DevOps:
    • The Foreman/Katello
      • Local DEB & YUM repositories
      • Linked to VMware, DHCP, Netbox, etc.
    • Ansible
  • *nix servers for in-house code
    • HAproxy load-balancing
    • Nginx reverse proxies and URL filtering & routing
  • Security Policy as interim CISO
    • Created baseline firewall policies and configuration from scratch.
    • Remote access policies and infrastructure.

Revamp of radius platform for xDSL users.

Since I took the contract, all PEN tests have shown that the new systems are secure, which has been a significant improvement on the initial post-compromise PEN test.

Skills
Environments
  • Data Centre
  • Network Security
IT Infrastructure Expertise
  • DevOps
  • IT Monitoring Tools & Management
  • PowerDNS
IT Infrastructure Products
  • CentOS
  • Cisco
  • Debian Linux
  • ELK Stack
  • FreeIPA
  • Galera MySQL Cluster
  • Grafana
  • HAProxy
  • Microsoft Azure
  • Nginx
  • PostgreSQL
  • RedHat Ansible
  • Rubicon Communications pfSense
  • The Foreman
  • Ubuntu
  • VMware
  • VMware ESXi7
  • VMware vSAN
IT Infrastructure Technologies & Protocols
  • Firewall Policies
  • IPSec
  • LDAP
  • NTP / PTP
  • RADIUS
  • SSL
  • VOIP
  • xDSL
IT Network Expertise
  • Network Design
IT Security Software & Tools
  • Keycloak
Programming Languages & Frameworks
  • Ansible
Software Development Tools
  • MongoDB
Director
Maizymoo Limited: Service Delivery
Telecommunications company - Service Provider, ISP, Mobile
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Jul 2014 - Present, Harpenden

About the role

We're a hosting company providing web, email and network services. Our aim is to enable local small businesses to focus on their core strengths by providing fully managed online and network services.

Services we provide:

  • Hosting
    • Design
      • Website design and changes
      • Website social media integration
      • Copywriting
      • Graphics and logo design
    • Redundant website and email hosting
      • Managed or unmanaged
    • Domain registration and management
  • Home/SMB networking
    • WiFi site-surveys
    • Network design
    • Cabling and installations
    • CCTV
    • AV (home) automation
    • Consultations on networking, storage and security issues.

We strive to work with local partners, in order to upskill and provide local support for small business while maintaining high standards and investing back into the community.

Skills
Business Activities
  • Client Management - External Facing
  • Client Management - Internal Facing
  • Escalation Management
  • Service Design
Design & Prototyping
  • Web Design
Environments
  • Cloud Computing
  • Data Networks
  • IT Operations
  • IT Security
  • Service Provider
  • Wireless
IT Infrastructure Expertise
  • DomainKeys Identified Mail (DKIM)
IT Infrastructure Products
  • Cisco
  • Fedora
  • FreeIPA
  • Galera MySQL Cluster
  • HAProxy
  • MariaDB
  • Meraki
  • Meraki Wireless
  • MySQL
  • Nagios
  • Palo Alto Networks VM-100
  • RedHat
  • Rubicon Communications pfSense
  • SpamAssasin
  • TP-Link
  • Ubiquiti
  • Ubiquiti LAN Access Switches
  • Ubuntu
  • VMware ESXi7
  • Zabbix
IT Infrastructure Technologies & Protocols
  • DNS
  • LDAP
  • SSH
  • SSL
IT Network Expertise
  • Wireless RF Survey
Marketing, Advertising and PR
  • Social Media
Programming Languages & Frameworks
  • PHP
  • Python
Service Delivery Scope
  • IT Infrastructure
  • IT Migrations
  • Software Development
  • Technical Projects
  • Testing
Software Development Tools
  • Bash
  • Redis
IP Network Design
Sky: IT Networks
Media & Broadcasting company - TV, Music, Movies, Radio, Entertainment
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Jul 2019 - Mar 2021, 1 Brick Lane, London

About the role

IP Network Architect helping the Sky IP Net Dev (ISP)

2021 - Sky Mobile F5 changes; changes to make the F5s fully authoritative for Gn and add introduce zone views for roaming and local devices.

2020 - Broadband network refresh. Responsible for one of the new network elements (multi-service edge), working with the project team to ensure consistent and vetted designs are documented, approved and implemented. Quality control of vendor-provided designs.

2020 - Nationwide Cisco 7600 PE refresh, with ASR-9906 and ASR-9901. The secondary scope was a service inventory and creation of configuration standards for connected services. This project was shelved; but I managed to get the HLD and LLD approved for use in some ad-hoc work, providing partial delivery of new hardware.

2020 - Some smaller client and internal connectivity projects.

2019/2020 - Cloud Exchange project cleaned up after the previous two resources made a mess, provided closer alignment to client-standards, effective documentation structure, and successful sign-off of project documentation.

2019 - Network design for CDN infrastructure based on ASR-9910. For high-speed distributed storage to bring VoD Video storage in-house

Skills
Environments
  • Data Networks
  • Network Security
IT Infrastructure Products
  • Cisco
  • Cisco ASR
  • Cisco ASR 9000 Series
  • Cisco IOS XR
  • Cisco IOS XRv
  • Cisco XRv 9000
  • F5
  • F5 Application Security Manager (ASM)
  • F5 BIGiP
  • F5 DNS
  • F5 iApp
  • F5 iRules
  • F5 LTM
  • Nokia
IT Infrastructure Technologies & Protocols
  • BGP
  • DNS
  • IP SLA
  • ISIS
  • l2vpn
  • LDP
  • MPBGP
  • MPLS
  • OSPF
  • Pseudo-wires
  • Segment Routing / SPRING
  • VPLS
  • VRRP
IT Network Expertise
  • Network Deployment
  • Network Design
Security Consultant
Deloitte (via Deloitte): IT Security, IT Networks
Financial Services company & Banks
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Jan 2017 - Jul 2019, London

About the role

Deloitte provide audit, consulting, financial advisory, risk management, and tax services to selected clients around the world.
As a technical consultant, I provide expertise to the Deloitte Security Operations team in the network space. This includes the design and implementation of security solutions utilising network technologies such as Blue Coat (Symantec) / Cisco / F5 / Palo Alto and Checkpoint. Projects include firewall refreshes, new service deployment and 3rd party connectivity.

Skills
Environments
  • Campus LAN (Large)
  • Content Delivery
  • Data Centre
  • Network Security
  • WAN (Nationwide)
IT Infrastructure Expertise
  • IT Monitoring Tools & Management
IT Infrastructure Products
  • Apple
  • Blue Coat
  • Blue Coat Management Center
  • Blue Coat ProxySG
  • Blue Coat Reporter
  • Check Point
  • Check Point R70
  • Check Point R71
  • Check Point R80
  • F5
  • F5 BIGiP
  • F5 GTM
  • F5 LTM
  • Linux
  • Microsoft Internet Information Services (IIS)
  • Microsoft Windows 10
  • Microsoft Windows 8
  • Microsoft Windows Server 2012R2
  • MySQL
  • Palo Alto Networks
  • Palo Alto Networks GlobalProtect
  • Palo Alto Networks PA-500
  • Palo Alto Networks Panorama
  • Palo Alto Networks Traps
  • Palo Alto Networks VM-100
  • Wireshark
IT Infrastructure Technologies & Protocols
  • DNS
  • Firewall Policies
  • HTTPS
  • IPSec
  • NAT
  • Server Load Balancing
  • SSL
IT Network Expertise
  • Architecture
  • Network Deployment
  • Network Design
  • Network Implementation
  • Network Support
  • Packet Analysis
  • Proof of Concept
IT Security Expertise
  • Data Leak Prevention
  • Firewalls
  • Incident Handling & Analysis
  • Incident Response
  • Intrusion Detection and Prevention
  • Operating system security‎
  • Symantec WSS
Programming Languages & Frameworks
  • HTML
Software Development Tools
  • Apache
  • Bash
Testing
  • Network Testing
Design Engineer
Sky UK Limited (via Hubbado Limited): IT Networks
Media & Broadcasting company - TV, Music, Movies, Radio, Entertainment
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Apr 2016 - Oct 2016, London

About the role

Documentation, PoC, testing, and deployment of F5 load-balancers as part of the green field DNS Service deployment for Sky Mobile. Involving eBGP, MPLS, Cisco ASR9k, and Nexus 2k/5k/9k.

F5 BIG-IP LTM & GTM integrated iApp authored for service automation.

Skills
Environments
  • Data Networks
  • Mobile Core
  • Service Provider
IT Infrastructure Expertise
  • Scripting
IT Infrastructure Products
  • Cisco
  • Cisco 7600 Series
  • Cisco ASA
  • Cisco ASR 9000 Series
  • Cisco Catalyst 6500 FWSM
  • Cisco Nexus 2000 Series
  • Cisco Nexus 5000 Series
  • Cisco Nexus 9000 Series
  • F5
  • F5 AFM
  • F5 BIG-IP 5200v Series
  • F5 BIGiP
  • F5 DNS
  • F5 GTM
  • F5 iApp
  • F5 iRules
  • F5 LTM
IT Infrastructure Technologies & Protocols
  • BGP
  • DNS
  • MPLS
  • NAT
  • Server Load Balancing
  • VPC
IT Network Expertise
  • Network Design
  • Network Implementation
  • Proof of Concept
Testing
  • Network Testing
Security Consultant
Deloitte: IT Networks
Financial Services company & Banks
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Nov 2015 - Mar 2016, London

About the role
As a technical consultant, I provided expertise to the Deloitte Security Operations team in the network space. This involved the design and implementation of security solutions utilising network technologies such as Cisco / F5 / Palo Alto / Blue Coat and Checkpoint. Projects included firewall refreshes, new service deployment and 3rd party connectivity.

Projects follow a gated process where at each step, documentation is signed-off by stakeholders and sponsors. Designs were dictated by gathered requirements and best practises.

Large scopes and partner/director visibility are not uncommon, e.g. SSL inspection of internet access for 12,000 users or WAN optimisation for live video streaming to 5000 users.
Skills
Environments
  • Campus LAN (Large)
  • Content Delivery
  • Data Centre
  • Network Security
  • WAN (Nationwide)
IT Infrastructure Expertise
  • IT Monitoring Tools & Management
IT Infrastructure Products
  • Blue Coat
  • Blue Coat Management Center
  • Blue Coat ProxySG
  • Blue Coat Reporter
  • Check Point
  • Check Point R70
  • Check Point R71
  • F5
  • F5 BIGiP
  • F5 GTM
  • F5 LTM
  • Palo Alto Networks
  • Palo Alto Networks GlobalProtect
  • Palo Alto Networks PA-500
  • Palo Alto Networks Panorama
  • Palo Alto Networks Traps
  • Palo Alto Networks VM-100
  • Wireshark
IT Infrastructure Technologies & Protocols
  • DNS
  • Firewall Policies
  • IPSec
  • NAT
  • Server Load Balancing
IT Network Expertise
  • Architecture
  • Network Deployment
  • Network Design
  • Network Implementation
  • Network Support
  • Packet Analysis
  • Proof of Concept
Testing
  • Network Testing
Senior Network Architect
AstraZeneca (via Dimension Data Network Services Limited): IT Networks
Healthcare company
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Jul 2014 - Sep 2015, Macclesfield, UK

About the role

* Senior Architect, part of the Dimension Data Professional Services Team.

* Supported global Telepresence installation on a non-compliant network.

* Delivered global QoS switching design for global LAN/WAN and vetted Data Centre Nexus low level design based on QoS HLD. Successfully deployed QoS to three sites.

* Successfully provided LAN support for a large scale (PBX) voice migration from E1 to VoIP.

* Designed and delivered new office LAN which included a high density Aruba wireless infrastructure for 400 end points. This included providing new standardised switch templates for the new standard switching platform (Cisco 3850) and an interim solution for guest wireless access. #1

* Successfully migrated Cisco CSM load-balanced services to F5 BigIP LTM.

* Various smaller projects dealing with F5 and LAN/WAN routing and switching.

Skills
Environments
  • Campus LAN (Large)
  • Campus LAN (Medium)
  • Campus LAN (Small)
  • Data Centre
  • Data Networks
  • Network Security
  • Voice / Telephony
  • WAN (Continental)
  • WAN (Global)
  • WAN (Nationwide)
  • Wireless
IT Infrastructure Expertise
  • IP Telephony
  • Scripting
IT Infrastructure Products
  • Aruba
  • Aruba Wireless
  • Cisco
  • Cisco Aironet Access Points
  • Cisco Catalyst 4500 Series
  • Cisco Catalyst 4900 Series
  • Cisco Catalyst 6500 ACE
  • Cisco Catalyst 6500 Series
  • Cisco IOS
  • Cisco IOS XE
  • Cisco LAN Access Switches
  • Cisco Nexus 2000 Series
  • Cisco Nexus 5000 Series
  • Cisco Nexus 7000 Series
  • Cisco NX-OS
  • F5
  • F5 BIGiP
  • F5 DNS
  • F5 GTM
  • F5 LTM
  • Wireshark
IT Infrastructure Technologies & Protocols
  • DNS
  • EIGRP
  • IP SLA
  • L2 Security
  • L2 VPN
  • L3 VPN
  • NAT
  • OSPF
  • QoS
  • Server Load Balancing
  • SIP
  • Unified Messaging
  • VPC
  • VSS
  • VxLAN
IT Network Expertise
  • Architecture
  • Network Deployment
  • Network Design
  • Network Implementation
  • Network Support
  • Packet Analysis
  • Requirements Capture
  • Strategy
Testing
  • Network Testing
Technical Consultant
Deloitte (via NSC Global): IT Networks
Financial Services company & Banks
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Sep 2012 - Jun 2014, London, UK

About the role

* Project team; responsible for a large number of projects covering LAN/WAN technologies, security (Palo Alto, Check Point, VPN etc.), wireless (Aerohive), load-balancing (F5) and caching (Bluecoat). Work included new deployments, upgrades and UAT testing. LAN refresh, DC refresh, WAN redesign and best practice architecture updates.

* Maintained position despite increasing level of outsourcing, 5 peers failed their interviews for this position. Praised for successful completion of several highly sensitive projects.

* Automated the LAN port inventory for the London Campus LAN refresh using Python scripting. Which tracked and calculated port utilisation, to aid the procurement process. Saved the customer money by reliably procuring the right amount of switches, lowering the project cost considerably from the initial estimate.

* As part of new service deployments (F5), found several other services which weren’t load-balancing effectively or where the redundant design was broken. The resulting cleaned F5 BigIP LTM configuration reduced risk and potential public embarrassment.

* Designed and installed a bespoke secured and segregated network infrastructure, to support live feed broadcasting for news reports and corporate web casts.

* Responsible for assessment of network & security policy compliance of new networked AV and digital office equipment.

* Implemented transparent proxy service with SSL interception. This involved troubleshooting many standards uncompliant sites, services like Skype and business critical 3rd party applications.

Skills
Environments
  • Campus LAN (Large)
  • Campus LAN (Medium)
  • Campus LAN (Small)
  • Data Centre
  • Data Networks
  • Network Security
  • WAN (Continental)
  • WAN (Nationwide)
  • Wireless
IT Infrastructure Expertise
  • IP Telephony
  • IT Monitoring Tools & Management
IT Infrastructure Products
  • Aerohive
  • Blue Coat
  • Blue Coat ProxySG
  • Check Point
  • Cisco
  • Cisco Branch Routers / ISR
  • Cisco Catalyst 6500 FWSM
  • Cisco Catalyst 6500 Series
  • Cisco CatOS
  • Cisco IOS
  • F5
  • F5 BIGiP
  • F5 DNS
  • F5 GTM
  • F5 LTM
  • Infoblox
  • Palo Alto Networks
  • Wireshark
IT Infrastructure Technologies & Protocols
  • BGP
  • DNS
  • EIGRP
  • Firewall Policies
  • GRE
  • Intrusion Prevention
  • IP SLA
  • L2 Security
  • NAT
  • OSPF
  • QoS
  • Server Load Balancing
  • Unified Messaging
  • VPC
  • VSS
  • VxLAN
IT Network Expertise
  • Architecture
  • Network Deployment
  • Network Design
  • Network Implementation
  • Network Support
  • Packet Analysis
  • Proof of Concept
  • Requirements Capture
Testing
  • Network Testing
Security Consultant / Trainer
Tyco (via NSC Global): IT Networks
Consultancy & Professional Services company
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Mar 2011 - Mar 2011, Rotterdam, The Netherlands

About the role
* Successfully trained a small operational department during a move from to a self-managed solution. On-site training in Dutch & hands on consultancy over just 2 weeks. Ensuring the customer’s ability to safely manage the solution independently.
Skills
Environments
  • Campus LAN (Small)
  • Data Centre
  • Data Networks
  • Network Security
  • WAN (Nationwide)
IT Infrastructure Technologies & Protocols
  • BGP
  • EIGRP
  • Firewall Policies
  • Intrusion Prevention
  • NAT
  • OSPF
IT Network Expertise
  • Audit
  • Configuration Approval
  • Network Implementation
  • Network Support
VoIP/Network Consultant
Walt Disney (via NSC Global): IT Networks
Telecommunications company - Service Provider, ISP, Mobile
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Jan 2011 - Mar 2011, Hammersmith, UK

About the role

* 2 individual consulting projects, covering knowledge/ability gaps in customer’s operational department.

* Received praise for the successful PoC and handover of Cisco ASA Phone Proxy - ensured cross-departmental and security compliance.

* Successful completion of corporate policy & PCI enforcement of 97 retail stores throughout EMEA. Using local FE resources (mostly non English speaking).

Skills
Environments
  • Campus LAN (Large)
  • Campus LAN (Medium)
  • Campus LAN (Small)
  • Data Centre
  • Data Networks
  • Network Security
  • Service Provider
  • Voice / Telephony
  • WAN (Continental)
  • WAN (Global)
  • WAN (Nationwide)
IT Infrastructure Expertise
  • IP Telephony
IT Infrastructure Products
  • Cisco
IT Infrastructure Technologies & Protocols
  • BGP
  • DNS
  • EIGRP
  • GRE
  • IP SLA
  • L2 Security
  • L3 VPN
  • NAT
  • OSPF
  • QoS
  • SIP
  • VxLAN
IT Network Expertise
  • Architecture
  • Audit
  • Network Deployment
  • Network Design
  • Network Implementation
  • Network Support
  • Proof of Concept
  • Requirements Capture
  • Strategy
Standards & Regulations
  • PCI-DSS
Testing
  • Network Testing
IP Designer
O2 (via NSC Global): IT Networks
Telecommunications company - Service Provider, ISP, Mobile
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Jul 2010 - Jul 2012, Slough, UK

About the role

* IP Designer on O2’s UK IP network infrastructure; scoped new work (fixed deliverable), detailed requirements gathering, authoring and obtaining sign-off of designs and implementation plans, liaise with 3rd parties for changes on O2's behalf.

* Several TDAs favoured me above peers for quality of completed work and technical ability.

* On schedule replacement and migration of 3rd party payment infrastructure, with projected business risk of £3M/day. Heavy reliance on BGP and network security. This work included 3rd party liaison, documentation and implementation.

* Blackberry uplink upgrade/migration completed without downtime while introducing new BGP filtering and resilience. This work included 3rd party liaison, documentation and implementation.

* Praised for successfully stepping into the performance testing (Ixia) of a new (Alcatel) broadband network after a peer was forced to abruptly abandon the project.

Skills
Environments
  • Campus LAN (Large)
  • Data Centre
  • Data Networks
  • Internet Exchange
  • Mobile Core
  • Service Provider
  • WAN (Continental)
  • WAN (Nationwide)
IT Infrastructure Products
  • Alcatel-Lucent
  • Cisco
  • Cisco 7200 Series
  • Cisco 7600 Series
  • Cisco Branch Routers / ISR
  • Cisco Catalyst 6500 ACE
  • Cisco Catalyst 6500 FWSM
  • Cisco Catalyst 6500 Series
  • Cisco CatOS
  • Cisco LAN Access Switches
  • Ixia
  • Ixia IxAccess
  • Ixia IxLoad
  • Ixia IxNetwork
  • Ixia IxServer
IT Infrastructure Technologies & Protocols
  • BGP
  • EIGRP
  • GRE
  • IP SLA
  • L2 Security
  • L3 VPN
  • LDP
  • mBGP
  • MPLS
  • NAT
  • OSPF
  • QoS
  • VxLAN
IT Network Expertise
  • Architecture
  • Network Deployment
  • Network Design
  • Network Implementation
  • Proof of Concept
  • Requirements Capture
Testing
  • Network Testing
Architect
T-Mobile (via NSC Global): IT Networks
Telecommunications company - Service Provider, ISP, Mobile
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Jan 2008 - Jun 2010, Hatfield, UK

About the role

* IP Designer; Impartial tester during multi-vendor proof of concept (PoC) project, authoring and obtaining sign-off of designs, plan/write/submit implementation plans to Operations for implementation and active support of Operations during important out-of-hours work.

* Praised for migration of a national (28 site) MPLS network without any service interruptions. Automated the tracking of changes of the 9000+ LAN ports during the project.

* Praised for completion of multi-site & multi 10Gbps capable mobile broadband transparent proxy service implementation design where operations was kept knowledgeable and fully in control throughout the project.

* Praised for outstanding impartiality by customer and three vendors during the PoC / RFP testing of vendor proposed mobile broadband solutions (using Spirent).

Skills
Environments
  • Campus LAN (Large)
  • Data Centre
  • Data Networks
  • Mobile Core
  • Network Security
  • Service Provider
  • WAN (Continental)
  • WAN (Nationwide)
IT Infrastructure Expertise
  • Scripting
IT Infrastructure Products
  • Cisco
  • Cisco 7200 Series
  • Cisco 7600 Series
  • Cisco ACE
  • Cisco Branch Routers / ISR
  • Cisco Catalyst 6500 ACE
  • Cisco Catalyst 6500 FWSM
  • Cisco Catalyst 6500 Series
  • Cisco CatOS
  • Cisco LAN Access Switches
  • Spirent
  • Spirent Avalanche
  • Spirent Test Centre
IT Infrastructure Technologies & Protocols
  • BGP
  • EIGRP
  • GRE
  • IP SLA
  • L2 Security
  • L3 VPN
  • LDP
  • mBGP
  • MPLS
  • NAT
  • OSPF
  • VxLAN
IT Network Expertise
  • Architecture
  • Network Deployment
  • Network Design
  • Network Implementation
  • Proof of Concept
  • Requirements Capture
Testing
  • Network Testing
Senior R&D Network Engineer
easynet: IT Networks
Telecommunications company - Service Provider, ISP, Mobile
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Feb 2004 - Dec 2007, Amsterdam, The Netherlands

About the role

* R&D Engineer responsible for: Architecture of new B2B solutions and services, by utilizing existing and seeking out new vendor relationships. Peer reviews of network upgrades to ensure they were service and future proof. Training of operational and pre-sales departments on new products and services. Evaluating vendor and Marketing proposed new products.

* The only Dutch member of an international team working on global portfolio unification. As part of this I designed the global access-QoS model, vetted the global core-QoS design and provided service/QoS SLA guidelines to Marketing.

* Played an instrumental role in developing career development plans & training/certification contracts with HR for easynet Netherlands.

* Motivated and obtained funding for $1M list-price worth of test equipment. This benefited our TTM and regularly gave us the upper hand in vendor relationships. I was able to guarantee selected equipment was fit for purpose (SLA), which improved customer retention.

* Worked with procurement in negotiating deals with discounts of up to 70% where the norm was around the 43% mark.

Skills
Business Activities
  • RFI
  • RFP / Procurement
Environments
  • Campus LAN (Large)
  • Campus LAN (Medium)
  • Campus LAN (Small)
  • Data Centre
  • Data Networks
  • Internet Exchange
  • Network Security
  • Service Provider
  • WAN (Continental)
  • WAN (Global)
  • WAN (Nationwide)
IT Infrastructure Expertise
  • IP Telephony
  • IT Monitoring Tools & Management
IT Infrastructure Products
  • Agilent
  • Cisco
  • Cisco 7100 Series
  • Cisco 7200 Series
  • Cisco 7300 Series
  • Cisco 7500 Series
  • Cisco 7600 Series
  • Cisco ASA
  • Cisco Branch Routers / ISR
  • Cisco Catalyst 4500 Series
  • Cisco Catalyst 6500 ASA-SM
  • Cisco Catalyst 6500 FWSM
  • Cisco Catalyst 6500 Series
  • Cisco CRS
  • Cisco IOS
  • Cisco IOS XR
  • Cisco LAN Access Switches
  • Extreme Networks
  • Ixia
  • Ixia IxAccess
  • Ixia IxChariot
  • Ixia IxLoad
  • Ixia IxNetwork
  • Ixia IxServer
  • Spirent
  • Spirent Avalanche
  • Spirent Test Centre
  • Ubuntu
  • Wireshark
IT Infrastructure Technologies & Protocols
  • BGP
  • DNS
  • EIGRP
  • Firewall Policies
  • GRE
  • IP SLA
  • IPSec
  • ISIS
  • L2 Security
  • L2 VPN
  • L2TP
  • L3 VPN
  • LDP
  • mBGP
  • MPLS
  • NAT
  • Netflow
  • NTP / PTP
  • OSPF
  • PPTP
  • QoS
  • SIP
  • VxLAN
IT Network Expertise
  • Architecture
  • Audit
  • Configuration Approval
  • Network Deployment
  • Network Design
  • Network Implementation
  • Network Support
  • Packet Analysis
  • Pre-Sales / Post-Sales
  • Proof of Concept
  • Requirements Capture
  • Roadmap
  • Strategy
Testing
  • Network Testing
Network Engineer
Telindus: IT Networks
Telecommunications company - Service Provider, ISP, Mobile
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Feb 2001 - Feb 2004, Utrecht, The Netherlands

About the role

* Responsibilities: Remote and on-site customer support, resolving issues and providing consultancy for improvements. LAN/WAN upgrades for SME, banking and Telco customers. Out of hours support. Carried long term responsibility for one customer’s EMEA network architecture and support.

* Gained CCNP and other vendor accreditations, broadened my technical expertise. Cisco PIX, Netscreen, Nokia Check Point, Bluecoat caching (Cacheflow at the time), Radius and strong authentication. Main focus remained Routing & Switching.

Skills
Environments
  • Campus LAN (Large)
  • Campus LAN (Medium)
  • Campus LAN (Small)
  • Data Centre
  • Data Networks
  • Network Security
  • Service Provider
  • Voice / Telephony
  • WAN (Continental)
  • WAN (Global)
  • WAN (Nationwide)
IT Infrastructure Expertise
  • IP Telephony
  • IT Monitoring Tools & Management
IT Infrastructure Products
  • AXELOS
  • Blue Coat
  • Blue Coat Cacheflow
  • Blue Coat ProxySG
  • Check Point
  • Cisco
  • Cisco 12000 Series
  • Cisco 7100 Series
  • Cisco 7200 Series
  • Cisco 7300 Series
  • Cisco 7500 Series
  • Cisco 7600 Series
  • Cisco Branch Routers / ISR
  • Cisco Catalyst 6500 FWSM
  • Cisco Catalyst 6500 Series
  • Cisco CatOS
  • Cisco CiscoWorks
  • Cisco IGX
  • Cisco IOS
  • Cisco LAN Access Switches
  • Cisco PIX
  • Extreme Networks
  • Netscreen
  • Ubuntu
  • Wireshark
IT Infrastructure Technologies & Protocols
  • BGP
  • DNS
  • EIGRP
  • Firewall Policies
  • GRE
  • Intrusion Prevention
  • IP SLA
  • IPSec
  • L2 Security
  • L2 VPN
  • L2TP
  • L3 VPN
  • NAT
  • Netflow
  • NTP / PTP
  • OSPF
  • PPTP
  • QoS
  • SIP
  • VxLAN
IT Network Expertise
  • Audit
  • Network Deployment
  • Network Design
  • Network Implementation
  • Network Support
  • Packet Analysis
  • Pre-Sales / Post-Sales
  • Proof of Concept
Testing
  • Network Testing
Resident Engineer, Field Engineer
Getronics: IT Networks
Telecommunications company - Service Provider, ISP, Mobile
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Dec 1997 - Jan 2001, Rotterdam, The Netherlands

About the role
On site consultant providing network support to Shell, Nedlloyd and others. LAN/WAN upgrades and installation of network monitoring tools. Received vendor agnostic datacom training.
Skills
Environments
  • Campus LAN (Large)
  • Campus LAN (Medium)
  • Campus LAN (Small)
  • Data Centre
  • Data Networks
  • Network Security
  • Service Provider
  • WAN (Continental)
  • WAN (Global)
  • WAN (Nationwide)
IT Infrastructure Expertise
  • IT Monitoring Tools & Management
IT Infrastructure Products
  • 3Com
  • Check Point
  • Cisco
  • Cisco 12000 Series
  • Cisco 7100 Series
  • Cisco 7200 Series
  • Cisco 7300 Series
  • Cisco 7500 Series
  • Cisco 7600 Series
  • Cisco Branch Routers / ISR
  • Cisco Catalyst 6500 FWSM
  • Cisco Catalyst 6500 Series
  • Cisco CatOS
  • Cisco CiscoWorks
  • Cisco IGX
  • Cisco IOS
  • Cisco LAN Access Switches
  • Cisco PIX
  • Fluke Networks
  • HP
  • IBM
  • Newbridge
  • Ubuntu
  • Ungerman Bass
  • Wireshark
IT Infrastructure Technologies & Protocols
  • BGP
  • DNS
  • EIGRP
  • Firewall Policies
  • GRE
  • L2TP
  • NAT
  • Netflow
  • NTP / PTP
  • OSPF
  • PPTP
  • VxLAN
IT Network Expertise
  • Network Deployment
  • Network Implementation
  • Network Support
  • Packet Analysis
Testing
  • Network Testing