Senior Systems Administrator

Damian
Krzewinski

IT Team Leader · Endpoint & Identity · AI-Augmented Operations

Cross-platform endpoint management (IRU/Kandji on macOS, Kaseya VSA on Windows), Okta identity, and Microsoft 365 administration at a global digital agency. Heavy AI-tooling user — Claude Code, Claude, ChatGPT — for scripting, ops automation, and quarterly security audits, with parallel responsibility for how the wider business adopts and governs AI tools. 15 years of measurable security and efficiency wins across UK and US enterprise environments.

Years in IT

$100k+

Cloud savings found

2 OS

Cross-platform fleet

MSc

Computer Science

Get in touch View timeline → LinkedIn ↗

02 — Experience

Career Timeline

15 years across UK and US enterprise environments.

Huge (formerly Hero Digital) · Digital Agency

📍 Fort Worth, TX → Chorley, UK

May 2024 — Present

Senior Systems Administrator

Hired by Hero Digital in the US pre-acquisition. Supported the transition into the Huge brand before relocating back to the UK in September 2025.
Cross-platform endpoint management across macOS (IRU, formerly Kandji) and Windows (Kaseya VSA) — silent software deployment, patch management, compliance enforcement, and custom MDM scripting (Homebrew bootstraps for rclone, ImageMagick, Claude Code, Git/Xcode CLT; agent scripts for Windows Updates, Node.js, VS Code, GCP CLI).
Built Okta Workflows automations for Microsoft 365 license management — three-tier Business / Enterprise / Teams model with Microsoft Graph API integration.
Implemented and rolled out DMARC for hugeinc.com (SPF/DKIM alignment, phased pct enforcement); configured Delinea Privilege Manager for privileged access management, including macOS application elevation policies.
Security tooling & audits — Sophos endpoint antivirus administration and policy management; Tenable vulnerability management (scanning, remediation tracking, risk prioritisation); Mimecast threat protection with roles and content examination policies; quarterly IT security audits across the full estate.
Tenant & platform administration — Microsoft 365 and Google Workspace tenant administration; AWS and GCP for cloud-first ops; Egnyte file storage; Slack Enterprise Grid administration and migration planning; Cato VPN split tunnelling configuration; Jira for project tracking, ticket management, and IT workflow coordination.
AI tooling embedded in daily ops — Claude Code for endpoint scripting (IRU Homebrew bootstraps, Kaseya VSA silent installs) — with parallel responsibility for how the wider business adopts and governs AI tools.

Vari · Workspace Innovation

📍 Coppell, Texas — USA

Jun 2022 — Jan 2024

Senior Systems Administrator

Performed cloud infrastructure analysis identifying potential annual savings of over $100,000.
Improved Intune hardware policy compliance from 51% to 89% through new compliance policies and targeted device remediation.
Raised Azure Security score for Identity Management from 73% to 96%.
Led hybrid-to-cloud transition converting 95% of on-prem GPOs and app deployments into Intune Configuration Profiles.
Spearheaded company-wide passwordless authentication using Windows Hello for Business, Okta FastPass, and a full Okta policy overhaul.
Developed mission-critical PowerShell automations including a 500+ line automated offboarding script, post-offboarding archival after 30 days, and local admin management scripts.
Built Windows Autopilot with OOBE enabling direct supplier-to-employee laptop shipping — drastically reducing service desk onboarding overhead.
Maintained and supported on-site systems across multiple international locations (United States, Taiwan).

FI Real Estate Management · Property & Facilities

📍 Chorley, Lancashire — UK

Jan 2018 — Nov 2021

IT Team Leader

Performed and delivered quarterly IT security audits required by sub-company Solutus (a regulated financial institution).
Implemented a multi-level DR solution combining on-site Veeam with Azure Backup for full cloud replication.
Orchestrated and managed multiple penetration tests, phishing simulation campaigns, and group-wide security audits.
Became the sole escalation point for the entire group, handling 100% of escalated issues across all companies.
Managed a high-performing IT team supporting multiple companies and technologies whilst ensuring all SLAs and KPIs were consistently met.
Served as the CEO's primary point of contact for all IT strategy and operational matters.
Led the team through the Covid-19 pandemic and UK lockdowns, maintaining business continuity and team development goals throughout.

FI Real Estate Management · Property & Facilities

📍 Chorley, Lancashire — UK

Nov 2016 — Dec 2017

IT Infrastructure Analyst

Reduced the service desk queue from 1,000+ tickets down to below 20 through systematic triage and process improvement.
Conducted infrastructure and network surveys that became the foundation for a major infrastructure overhaul.
Deployed multiple Hyper-V hypervisors hosting up to 16 VMs each, replacing ageing physical servers and dramatically improving network reliability.
Upgraded comms room infrastructure — replaced switches and routers, rewired patch panels, and implemented multi-site Wi-Fi solutions.
Transitioned legacy phone system to a network-hosted FreePBX / Asterisk on-premises telephony platform.

Coral Island · Family Entertainment

📍 Blackpool, Lancashire — UK

May 2014 — Oct 2016

IT Support

First port of call for all system and physical IT issues across one of Blackpool's largest visitor attractions.
Maintained uptime and rapid response across business-critical point-of-sale and operational systems in a high-footfall environment.

Damian
Krzewinski

Stack & Specialisms

Career Timeline

Qualifications

Get In Touch

DamianKrzewinski

Stack & Specialisms

Career Timeline

Qualifications

Get In Touch

Damian
Krzewinski