Sean Ellison
@seanellison
I secure and administer enterprise Windows environments for mission-critical operations.
United StatesWhat I'm looking for
I administer and secure Windows enterprise environments at L3Harris Technologies across two Special Access Program networks supporting more than 700 users and 1,000+ workstations.
I've provisioned 200+ secure systems, resolved roughly 60 critical tickets monthly, cut response times in half, maintained 99.9% uptime, and authored 20+ SOPs that improved deployment accuracy and saved team time.
My background also includes configuration management across major product lines and mission-critical Air Force armament operations, where I lead teams, maintain strict accountability, and uphold demanding compliance standards.
Experience
Work history, roles, and key accomplishments
Specialist, System Administrator
L3Harris Technologies
Jul 2025 - Present (1 year 2 months)
Administered and secured Windows enterprise environments across two SAP networks, supporting over 700 users and managing 1,000+ workstations. Streamlined deployments, resolved ~60 tickets monthly, and authored 20+ SOPs to improve efficiency and compliance.
Armament Systems Craftsman
United States Air Force
Dec 2012 - Present (13 years 9 months)
Directed flightline and experimental loading operations for a $6.4 billion asset fleet, leading teams of up to 12 personnel. Maintained 100% accountability and 99% release reliability, and executed 100+ inspections annually.
Sr. Associate, Hardware Configuration Management
L3Harris Technologies
Jan 2020 - Jul 2025 (5 years 6 months)
Administered configuration control and change management for 7–10 product lines, processing 10+ ECPs daily. Enforced configuration traceability, led program closeouts, and facilitated cross-functional governance.
Education
Degrees, certifications, and relevant coursework
University of Arizona
Bachelor of Science, Information Technology
Pursuing a Bachelor of Science in Information Technology, expected completion in December 2025.
University of Houston
Master's Certification, Configuration Management
Completed a Master's Certification in Configuration Management Process Improvement (CMPIC) in 2022.
Community College of the Air Force
Associate of Applied Science, Armament Systems Technology
Earned an Associate of Applied Science in Armament Systems Technology in December 2019.
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
Salary expectations
Skills
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