Browse Jobs
Browse fresh roles from company career pages, then filter by keyword, location, salary, skills, remote scope, and more. Each listing links back to the employer-controlled apply path when available.
68 jobs match your filters
12mo
Senior System Administrator
Hercules Crane & Lifting Supplies
The ideal candidate is a battle-tested infrastructure expert who thrives in high-stakes, high-autonomy environments and brings a deep, practical understanding of enterprise IT systems. They’re not just technically strong—they own problems end-to-end, anticipate failures before th
Dartmouth, NS, Canada
hybridFull-time
109mo
I
Senior System Administrator
Implify Inc
• Be a member of a system administration team responsible for the design, deployment, installation, configuration and maintenance of Linux/UNIX-based server systems and software. • Be able to learn quickly and work independently as well as collaborate with team and project member
Annapolis, MD, United States
remoteContractMid-Senior LevelEasy Apply
1d
Senior System Administrator
Skyline Group of Companies
We’re growing! We're looking for passionate, driven and energetic candidates to join our Technology Solutions team for the position of Senior System Administrator located in our Head Office in Guelph, Ontario. Compensation : Starting at $75,000 annually plus bonus. Are you passio
Guelph, ON, Canada
hybridEasy Apply
2d
Senior System Administrator
Odyssey
Odyssey Systems has an exciting opportunity for a SeniorSystems Administrator providing support to the Air Force Life Cycle Management Center-Ground Base Air Defense Sensor division (AFLCMC/ESG). The ESG Division manages efforts focused on developing, acquiring, fielding and s
Hanscom AFB, MA, US
onsite
2w
Senior System Administrator
Alstom
About Nomad Digital Nomad Digital is the world's leading provider of passenger and fleet connectivity solutions to the railway industry. Founded in 2002, and headquartered in the UK, currently serving more than 80+ global customers - in more than 40 countries - Nomad designs, bui
Newcastle Upon Tyne, NET, GB
onsite
2w
P
Senior System Administrator
Peterson Technologies
Thanks for visiting our Career Page! Peterson Technologies was founded in 2001 as an advanced technology company providing smarter ways to ingest, detect interests, translate, display, and simplify the usefulness of mass volumes of data. To provide this level of service, Peterson
Annapolis Junction, MD
onsiteEasy Apply
2w
P
Senior System Administrator
Peterson Technologies
Thanks for visiting our Career Page! Peterson Technologies was founded in 2001 as an advanced technology company providing smarter ways to ingest, detect interests, translate, display, and simplify the usefulness of mass volumes of data. To provide this level of service, Peterson
Annapolis Junction, MD
onsiteEasy Apply
2w
F
Senior System Administrator
Foxconn Industrial Internet - FII
Job Description 1. PURPOSE AND SCOPE ● 1.1. Objective: The purpose of this document is to define the expert-level technical criteria, structural engineering responsibilities, and leadership expectations for the Senior IT System Administrator role at Foxconn Industrial Internet. ●
Houston, TX
hybridEasy Apply
2w
F
Senior System Administrator
Foxconn Industrial Internet - FII
Responsibilities: Perform server administration tasks, including user/group administration, security permissions, group policies, print services, research event log warnings and errors, and resource monitoring to ensure seamless integration of system architecture components. Moni
Sunnyvale, CA
remoteEasy Apply
2w
A
Senior System Administrator
ARC Business Solutions
ARC Business Solutions Inc. is an established and customer-oriented information technology solution provider with proven abilities to incorporate strategy, creativity and technical aspects into business solutions. ARC operates out of 4 regions in Canada–Edmonton, Calgary, Toronto
Edmonton, AB, Canada
hybridEasy Apply
2w
Senior System Administrator
Alstom
About Nomad Digital Nomad Digital is the world's leading provider of passenger and fleet connectivity solutions to the railway industry. Founded in 2002, and headquartered in the UK, currently serving more than 80+ global customers - in more than 40 countries - Nomad designs, bui
Perth, WA, AU
hybrid
3w
Senior System Administrator
Peraton Labs
We are seeking a Senior System Administrator to provide enterprise-focused engineering support to a Government Customer. You will provide system administration solutions to meet required capabilities, and you will create bills of materials, network designs and diagrams, and other
Fort Meade, MD, US
hybrid
3w
Senior System Administrator
DCCA
DCCA is a veteran-owned IT business specializing in providing innovative solutions to a variety of government agencies and commercial enterprises since 1982. DCCA is proud to offer career growth opportunities and a competitive compensation and benefits package. Visit our websit
Columbia, MD
remote
4w
Senior System Administrator
Social Discovery Group
%BUTTON_APPLY_TO_POSITION% %BUTTON_APPLY_USING_INDEED% %BUTTON_APPLY_USING_LINKED_IN% Social Discovery Group (SDG) is one of the world's largest groups of social discovery companies, uniting millions of users on dozens of products. SDG solves the problem of loneliness, isolation,
Tbillisi, GE
onsiteEasy Apply
1mo
Senior System Administrator
Peraton
We are seeking a Senior System Administrator to provide enterprise-focused engineering support to a Government Customer. You will provide system administration solutions to meet required capabilities, and you will create bills of materials, network designs and diagrams, and other
Fort Meade, MD, US
hybrid
1mo
Senior System Administrator
OSL Retail Services
At OSL Retail Services, we believe people are the heart of everything we do, and it is an exciting time to be part of something special! Our momentum is growing, and is fueled by innovation, collaboration, and a shared entrepreneurial spirit that drives real results. Founded in 2
Mississauga, ON, CA
onsite
1mo
Senior System Administrator
Edgewater Federal Solutions, Inc.
Edgewater Federal Solutions is seeking a Senior Systems Administrator to join our team. The Senior Systems Administrator will play a pivotal role in our IT operations, responsible for deploying, maintaining, enhancing, and supporting our IT infrastructure. This role requires leve
Phoenix | US-CO-Lakewood | US-Loveland, CO | US-CA-Folsom, AZ, US
onsite
1d
Senior System Administrator - DCGS Infrastructure
T2S Solutions
Systems Administrator, Senior Full Time Aberdeen Proving Ground, MD Secret....
Full Time Aberdeen Proving Ground, MD
onsiteNew
1w
R
Senior System Administrator, Tucson, AZ.
RTX
Date Posted: 2026-06-11

 Country: United States of America Location: US-AZ-TUCSON-848 ~ 1151 E Hermans Rd ~ BLDG 848 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearan
US-AZ-TUCSON-848 ~ 1151 E Hermans Rd ~ BLDG 848
onsiteFull-time
1w
J
Senior System Administrator – Windows Server & Active Directory
JMA Wireless
JMA is restoring U.S. leadership in wireless technology at a critical time in the transition to 5G. It makes the world’s most advanced software-based 5G platform, designed, coded, and manufactured in Syracuse, NY at the only U.S.-owned 5G factory in the country. Across its glob
Syracuse, NY$120K - $140K
remoteFull-timeEasy Apply
1w
R
Senior System Administrator - Tucson AZ Onsite
RTX
Date Posted: 2026-06-08

 Country: United States of America Location: US-AZ-TUCSON-802 ~ 1151 E Hermans Rd ~ BLDG 802 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearan
US-AZ-TUCSON-802 ~ 1151 E Hermans Rd ~ BLDG 802
onsiteFull-time
2w
R
Senior System Administrator - Tucson AZ Onsite
RTX
Date Posted: 2026-06-04

 Country: United States of America Location: US-AZ-TUCSON-M05 ~ 1151 E Hermans Rd ~ BLDG M05 (External Site) Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. gover
US-AZ-TUCSON-M05 ~ 1151 E Hermans Rd ~ BLDG M05 (External Site)
onsiteFull-time
3w
Senior System Administrator II [Storage Engineer]
Adyen
This is Adyen Adyen provides payments, data, and financial products in a single solution for customers like Meta, Uber, H&M, and Microsoft - making us the financial technology platform of choice. At Adyen, everything we do is engineered for ambition. For our teams, we create an e
Bengaluru
hybridEasy Apply
1mo
Senior System Administrator - TS/SCI w/Polygraph
General Dynamics Information Technology
Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Backup and Recov
USA VA Reston
onsiteFull-time
1mo
R
Senior System Administrator (2nd shift)
RTX
Date Posted: 2026-05-11 Country: United States of America Location: US-AZ-TUCSON-848 ~ 1151 E Hermans Rd ~ BLDG 848 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is requ
US-AZ-TUCSON-848 ~ 1151 E Hermans Rd ~ BLDG 848
onsiteFull-time