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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
  • Experience
  • Work Histories
  • Certifications
  • CV / Resume

Recent companies

Maizymoo LimitedService DeliveryLess than 1 year
IP NexiaIT Security, IT Networks, IT Infrastructure, DevOps1 year
SkyIT Networks1 year
DeloitteIT Networks, IT Security2 years
2017Now
These are the most recent companies Djerk has worked for. To see the full list go to Work Histories

Experience summary

19972022`12`14`15`16`17`19`21
24yrsExperience
IT Networks24 years
Service Delivery8 years
IT Security4 years
DevOps1 year
IT Infrastructure1 year

About

Network and security consultant with over 20 years of experience. I started as a field and resident engineer and am now consulting at ISPs end enterprises. My skillset diversified early on as I postponed my efforts to achieve CCIE accreditation in order to gain experience in Security, VoIP, strong-authentication and application-aware services.

Experience includes:

  • Day to day network support and operations
  • ITIL consulting across departments to improve operational efficiency
  • Working internationally unifying service provider access portfolio across Europe (access methods & QoS)
  • F5 work ranging from deployment to iRules and application-aware services
  • Full-stack stateful testing using Spirent, Ixia (and Agilent). For PoC and 
  • Network design, routing & switching
  • QoS design (WiFi, LAN & WAN)
  • Endpoint security (proxy services), NGFW
  • Extensive protocol knowledge
  • Languages: Mainly Bash, Python & F5 iRules

Skills

Skill strength:
Strong
Medium
Low
How is strength calculated?
  • years of experience
  • recency of use
Business Activities
Change Management
Client Management - Internal Facing
Escalation Management
RFP / Procurement
Client Management - External Facing
Additional business activities: RFI and Service Design
Design & Prototyping
Web Design
Environments
Network Security
Content Delivery
Service Provider
WAN (Global)
Voice / Telephony
Additional environments: Data Centre, WAN (Nationwide), Campus LAN (Medium), Campus LAN (Small), Cloud Computing, WAN (Continental), IT Operations, Wireless, Data Networks, Mobile Core, Internet Exchange, Campus LAN (Large), and IT Security
IT Infrastructure Expertise
DomainKeys Identified Mail (DKIM)
DevOps
PowerDNS
Scripting
IP Telephony
Additional it infrastructure expertise: IT Monitoring Tools & Management
IT Infrastructure Products
Wireshark
Ixia IxNetwork
Cisco Catalyst 6500 ASA-SM
Zabbix
Aruba
Additional it infrastructure products: VMware ESXi7, Fedora, AXELOS, Cisco Aironet Access Points, VMware vSAN, Linux, Cisco 7100 Series, Nagios, Cisco IOS XE, Palo Alto Networks PA-500, Meraki Wireless, Spirent Avalanche, Blue Coat ProxySG, Cisco 7600 Series, Check Point, Cisco Nexus 9000 Series, Check Point R80, Ixia IxServer, The Foreman, Ixia, and 97 more
IT Infrastructure Technologies & Protocols
DNS
VxLAN
IPSec
L2 Security
VPLS
Additional it infrastructure technologies & protocols: l2vpn, LDP, MPBGP, EIGRP, Server Load Balancing, RADIUS, SIP, QoS, VOIP, xDSL, IP SLA, VSS, VPC, mBGP, Netflow, NTP / PTP, GRE, L2TP, PPTP, Intrusion Prevention, and 17 more
IT Network Expertise
Pre-Sales / Post-Sales
Architecture
Roadmap
Proof of Concept
Requirements Capture
Additional it network expertise: Audit, Packet Analysis, Configuration Approval, Strategy, Network Design, Network Deployment, Network Implementation, Network Support, and Wireless RF Survey
IT Security Expertise
Data Leak Prevention
Symantec WSS
Operating system security‎
Intrusion Detection and Prevention
Incident Response
Additional it security expertise: Incident Handling & Analysis and Firewalls
IT Security Software & Tools
Keycloak
Marketing, Advertising and PR
Social Media
Programming Languages & Frameworks
Ansible
HTML
Python
PHP
Service Delivery Scope
IT Infrastructure
Software Development
Testing
Technical Projects
IT Migrations
Software Development Tools
Redis
Apache
MongoDB
Bash
Standards & Regulations
PCI-DSS
Testing
Network Testing