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Djerk Geurts
7 assignments
Maizymoo Limited, IP Nexia
Director, DevOps & Security Consultant
Harpenden, England, United Kingdom
Not looking for work
Remote work
Not available

Featured Skills

CiscoService ProviderData NetworksNetwork DesignDNSWirelessNetwork SecurityVMware ESXi7Wireless RF SurveyFedora

Recent companies

IP NexiaIT Security, IT Networks, IT Infrastructure, DevOps4 years
Maizymoo LimitedService DeliveryLess than 1 year
SkyIT Networks1 year
DeloitteIT Security, IT Networks2 years
2017Now
These are the most recent companies Djerk has worked for. To see the full list go to Work Histories

Experience summary

19972025`12`14`15`16`17`19`21
27yrsExperience
IT Networks27 years
Service Delivery11 years
IT Security7 years
IT Infrastructure4 years
DevOps4 years

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
Skill strength levels
  • Weak: Basic understanding
  • Medium: Proficient level
  • Strong: Expert level
Business Activities
Client Management - Internal Facing
Client Management - External Facing
Escalation Management
Service Design
RFI
Additional business activities: RFP / Procurement and Change Management
Design & Prototyping
Web Design
Environments
Data Networks
Service Provider
Wireless
Network Security
IT Security
Additional environments: IT Operations, Cloud Computing, Data Centre, WAN (Nationwide), Campus LAN (Large), WAN (Continental), Content Delivery, Campus LAN (Medium), Campus LAN (Small), Mobile Core, WAN (Global), Voice / Telephony, and Internet Exchange
IT Infrastructure Expertise
DomainKeys Identified Mail (DKIM)
IT Monitoring Tools & Management
PowerDNS
DevOps
IP Telephony
Additional it infrastructure expertise: Scripting
IT Infrastructure Products
Cisco
Palo Alto Networks VM-100
Ubuntu
TP-Link
Meraki
Additional it infrastructure products: Nagios, HAProxy, Galera MySQL Cluster, Zabbix, MySQL, FreeIPA, VMware ESXi7, Fedora, RedHat, SpamAssasin, MariaDB, Rubicon Communications pfSense, Meraki Wireless, Ubiquiti LAN Access Switches, Ubiquiti, RedHat Ansible, VMware vSAN, PostgreSQL, CentOS, Nginx, and and 97 more skills
IT Infrastructure Technologies & Protocols
DNS
LDAP
SSH
SSL
Firewall Policies
Additional it infrastructure technologies & protocols: IPSec, NTP / PTP, xDSL, VOIP, RADIUS, NAT, OSPF, BGP, IP SLA, Server Load Balancing, MPLS, LDP, EIGRP, VxLAN, L2 Security, HTTPS, GRE, ISIS, MPBGP, Segment Routing / SPRING, and and 17 more skills
IT Network Expertise
Network Design
Wireless RF Survey
Network Deployment
Network Implementation
Proof of Concept
Additional it network expertise: Architecture, Network Support, Packet Analysis, Requirements Capture, Strategy, Audit, Configuration Approval, Pre-Sales / Post-Sales, and Roadmap
IT Security Expertise
Operating system security‎
Intrusion Detection and Prevention
Incident Response
Incident Handling & Analysis
Firewalls
Additional it security expertise: Data Leak Prevention and Symantec WSS
IT Security Software & Tools
Keycloak
Marketing, Advertising and PR
Social Media
Programming Languages & Frameworks
Python
PHP
Ansible
HTML
Service Delivery Scope
Testing
Technical Projects
IT Migrations
IT Infrastructure
Software Development
Software Development Tools
Bash
Redis
MongoDB
Apache
Standards & Regulations
PCI-DSS
Testing
Network Testing

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