Connor Freebairn

Work & Experience

Friendly snapshot of my path as a Tier 3 engineer, designing, stabilising and modernising multi-tenant and regulated environments, supporting policing & critical operations, contributing in volunteer roles, and sharing the tooling, platforms and focus areas that shape how I build resilient, secure systems.

Career Timeline

2024 - Present

IT Third Line Engineer · KCS IT Services & Digital Marketing
Tier 3 escalation across multi-tenant estates: deep diagnostics, root cause investigation and infrastructure architecture. Deliver migrations & modernisation (virtualisation, cloud adoption, IAM re-alignment, segmentation, security hardening), capacity & performance modelling, DR/HA test orchestration, pre‑sales validation, HLD/LLD and runbooks while mentoring lower tiers and embedding observability & automation (PowerShell, Ansible, pipelines) to standardise, cut MTTR and improve resilience, security and cost efficiency.

2023 - 2024

Server & Storage Engineer · Northumbria Police
Owned stability and lifecycle of mission‑critical server, virtualisation and enterprise storage platforms supporting 24/7 policing; delivered capacity planning, performance optimisation, patching & vulnerability remediation, backup/recovery assurance (test restores) and contributed to HA clustering, storage tiering and security control decisions in a regulated environment.

2023

IT Third Line Engineer · KCS IT Services & Digital Marketing
Short‑term escalation cover stabilising inherited customer environments: concise health/risk assessments, remediation of backup gaps, misconfiguration and security posture issues, prioritised onboarding support and lean foundation documentation enabling later modernisation.

2022 - 2023

IT Infrastructure Engineer · Integrity IT Solutions
Top escalation point for datacentre compute, storage, networking, backup and security governance; led migrations, upgrades and consolidation with design & as‑built documentation while introducing automation (PowerShell, Ansible) and monitoring/capacity reporting to improve reliability and reduce MTTR.

2020 - 2022

ICT Technical Analyst · Cumbria Police
2nd line / advanced support for critical policing systems including on‑call response: incident, problem & change execution, PowerShell automation of repetitive admin, patch & security cycles, compliance support and DR procedure refinement.

2018 - 2020

ICT Service Desk Technician · Cumbria Police
Frontline & early escalation: incident triage, deeper diagnostics, AD / Group Policy administration, scripted bulk operations (PowerShell), endpoint hardening & patch coordination, forensic data capture pre‑Tier 2, infrastructure maintenance (certificates, backups, print/file services) and SOP / KB authorship.

2015 - 2018

Senior IT Technician · Newman Catholic School
Sole technical authority across networking, servers, virtualisation & endpoint management; delivered safeguarding & security controls, backup/DR testing, stakeholder engagement and scoped/implemented upgrade & remote access (VPN) projects within tight budgets.

2015 - 2019

Customer Support Representative · CraftSRV Ltd (Part-time)
SLA‑driven support for Linux hosting: provisioning, billing queries, customer documentation, regression testing plus community engagement & feedback support.

Community Involvement

2018 - Present

Ubuntu Archive Mirror Host · Official 10Gbps Mirror
Operate and maintain an official 10Gbps Ubuntu archive mirror since 2018, providing high‑availability package distribution bandwidth to the community and improving regional sync performance.

2020 - 2024

Shift Controller (Volunteer) · Blood Bikes Cumbria
Coordinated urgent, out-of-hours medical logistics: dispatched riders, organised Dark Fiber / comms liaison where required, and ensured safe, timely transport of blood, pathology samples, medication, and critical materials between North Cumbrian hospitals. Supported Great North Air Ambulance Service operations via inter-group coordination, rota management, and escalation handling.

2022 - 2024

Technical Team (Yellows) Volunteer · Insomnia Gaming Festival
Supported multiple festival events delivering on-site technical assistance: deploying and maintaining network & infrastructure for attendee (BYOC) areas, troubleshooting connectivity and hardware issues, assisting production/crews, rapid incident response, and enhancing player experience across large-scale LAN environments.

Clearance & Vetting

Previously held UK security and safeguarding clearances enabling work within sensitive and regulated environments:

SC EV RV DBS Enhanced DBS

(SC: Security Clearance · EV: Enhanced Vetting · RV: Recruitment Vetting · DBS: Disclosure & Barring Service)

Technical Expertise

Tier 3 Infrastructure Engineer: Design, escalation, and optimisation of high-availability, security-focused platforms across critical national infrastructure and large-scale enterprise estates.

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Infrastructure & Platforms

Windows Server 2012R2–2025 RHEL SUSE Ubuntu LTS Azure Microsoft 365 VMware vSphere Hyper-V Dell PowerEdge HPE ProLiant Critical National Infrastructure DigitalOcean 700+ VM Clusters Hybrid Cloud Active Directory Group Policy DHCP DNS High Availability Clusters Rack Servers Blade Chassis Tower Servers Hardware Lifecycle Storage & SAN
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Security, Networking & Resilience

Sophos Firewall Cisco Enterprise VPN Solutions Disaster Recovery High Availability Cisco Firepower Cisco Meraki FortiGate pfSense OPNsense SonicWall Smoothwall F5 BIG-IP Forcepoint CyberArk Ubiquiti Network Security Endpoint Protection Traffic Light Protocol (TLP) Gov Classification Schemes Compliance Frameworks Failover Systems RTO/RPO Planning Dark Fiber NetBackup Veeam Datto Acronis Dell NetWorker RecoverPoint
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Automation, Architecture & Engineering

PowerShell Ansible (AAP) System Architecture Infrastructure Design Technical Documentation Infrastructure as Code Linux Automation Configuration Management Git Scalability Planning Capacity Management Enterprise Solutions ITIL (Service Management)

Experience Scale

🏠 Home Lab to Enterprise

From personal lab environments to managing 700+ VM enterprise clusters, bringing deep understanding across all scales of infrastructure.

🏛️ Critical National Infrastructure

Hands-on experience with mission-critical systems including national infrastructure and 24/7 control room operations.

⚡ Tier 3 Escalation

Highest point of technical escalation for complex infrastructure issues, system design, and enterprise-level problem resolution.

Work With Me

Operating from the Lake District with KCS (est. 1998), I help organisations modernise, secure and streamline infrastructure—combining deep escalation engineering with pragmatic delivery.

Managed Services

Servers, network, backup, DR, endpoint support & lifecycle care with roadmap advisory.

Co-Managed IT

Augment internal teams: escalations, tooling alignment, capacity cover.

Security

Hardening, identity, email & endpoint controls, policy uplift.

DR & Resilience

HA patterns, RTO/RPO validation, failover tests, recovery assurance.

Migrations & Upgrades

Virtualisation, cloud, storage & directory transitions with minimal risk.

Automation

PowerShell & Ansible: repeatability, velocity & toil reduction.

Root Cause

Deep diagnostics, remediation plans, stability baselining.

Documentation

HLD/LLD, runbooks, SOPs, KB & operational artefacts.

From rapid escalation engagements to phased transformation programmes—happy to scope what fits.