Carlyle Christopher Chetram
Senior Network Security Engineer
Senior Network Security Engineer with 7+ years’ experience designing, supporting, securing, and troubleshooting enterprise and service provider environments. Strong background in firewall technologies, WAN and MPLS networking, cybersecurity operations, network troubleshooting, incident response, SIEM technologies, DDoS mitigation services, and technical operations.

Experienced working within high-security environments supporting critical infrastructure and government-related services with SC and NPPV3 clearance.
Clearance
  • SC – Security Clearance
  • NPPV3 – Non-Police Personnel Vetting Level 3
Current Certifications
  • CCNP Service Provider SPCOR 350-501 – Passed
  • CCNP Service Provider SPRI 300-510 – Passed
  • CCNA 200-301 – Passed
  • PCEP Python Certified Entry Professional
  • Previously held: NSE4, PCNSA, ACSE, Juniper JNO-103
Professional Experience

Network Security Engineer / Technical Operations Authority

BT (British Telecom) | Sept 2025 – Current

Acting as Technical Operational Authority for a high-security government client environment, overseeing network security operations, technical delivery, escalation management, and incident response processes. Responsibilities include root cause analysis, stakeholder management, network security reviews, operational assurance, and technical leadership.

Secure Networks & Cyber Security Engineer

BT (British Telecom) | June 2024 – Sept 2025

Senior 3rd line operational support role focused on enterprise security infrastructure, WAN services, DDoS mitigation support, firewall platforms, monitoring systems, and operational improvements across critical infrastructure environments.

BT Cyber Security Specialist

BT (British Telecom) | March 2023 – June 2024

Responsible for escalations, client interaction, network improvements, documentation, and security operations support across complex enterprise environments using Fortinet, Palo Alto, Cisco, Zscaler, Checkpoint, and SIEM-related technologies.

NOC Engineer

OpticoreIT | Oct 2022 – March 2023

Supported managed services clients through fault investigation, troubleshooting, firewall support, monitoring, escalation handling, and network maintenance activities across enterprise customer environments.

Vodafone Onsite Support Network Engineer

OpticoreIT | Jul 2019 – Nov 2022

Delivered customer-facing network engineering support involving VPNs, firewall refreshes, infrastructure enhancements, HLD/LLD creation, implementation planning, CAB approvals, resilience projects, MPLS, VRFs, routing, switching, and enterprise firewall technologies.

NOC Team Lead

Convergent Network Solutions Group (6 Degrees) | Aug 2018 – Jul 2019

Led NOC operational activities involving Cisco switching, Juniper and ASA firewalls, incident response, client escalations, CAB participation, monitoring systems, security operations coordination, and SLA management.

Junior Consultant

Convergent Network Solutions Group | Feb 2017 – Aug 2018

Worked on SIEM deployments, network diagrams, infrastructure support, change requests, server builds, vulnerability assessment exposure, AlienVault deployments, Linux support, OpenVPN implementations, and security monitoring activities.

Security Engineer

SecureNet Communications | Jun 2016 – Feb 2017

Supported network and security engineering activities across client environments.

Soldier

Royal British Army | Jan 2009 – Dec 2014

Served within the British Army developing discipline, teamwork, responsibility, resilience, and operational professionalism.

Technical Skills
  • Fortinet Firewalls
  • Palo Alto Firewalls
  • Checkpoint Firewalls
  • Cisco ASA
  • Cisco Firepower
  • Cisco ISE
  • BGP
  • MPLS
  • VRFs
  • L3VPNs
  • Routing & Switching
  • WAN Technologies
  • SD-WAN
  • SIEM
  • DDoS Protection
  • Akamai Prolexic
  • SolarWinds
  • Entuity
  • F5 Load Balancers
  • Zscaler
  • Python
  • Linux
  • Automation
  • EVE-NG
  • Astro
  • GitHub
  • Cloudflare Pages
Education

BEng Computer Networking – First Class Honours

London Metropolitan University | 2013 – 2016

Certificate in Computing & IT

Open University | 2010 – 2013

Certificate of Higher Education

Open University | 2010 – 2013

© 2026 Carlyle Chetram
HeyChets.com β€” Network, Cybersecurity & Cloud Portfolio