1742 - Junior System Administrator
- Salary
- $70,000 - $90,000 annually
- Level
- Junior
Not stated in the posting: work type, visa.
Open. First seen 3 October 2026.
About the role
Sigma Defense is seeking a motivated Junior System Administrator with a strong help desk background and solid communication skills. The ideal candidate will support daily IT operations, assist with system administration tasks, and help maintain a reliable technical environment for end users. This role is well-suited for someone early in their IT career who is eager to learn and grow within a dynamic team.
Sigma Defense's standard text
Equal Opportunity Employer/Veterans/Disabled: Sigma Defense Systems is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.
Requirements
- 1 - 2 years of experience in an IT help desk or technical support role.
- Strong customer service mindset and excellent written/verbal communication skills.
- Basic hands-on experience with Windows Server environments (e.g. Active Directory, Group Policy)
- Familiarity with Windows 10/11 administration and troubleshooting.
- Understanding of networking fundamentals (TCP/IP, DNS, DHCP)
- Must be a U.S. citizen.
Personnel Clearance Level:
- Candidate must possess or have the ability to obtain a Top Secret security clearance or higher.
Education Requirements:
- Bachelor's degree from an accredited college or university in Computer Science or related field of study.
Essential Job Duties (not all-inclusive):
- Provide Tier 1–2 help desk support for hardware, software, and network issues.
- Install, configure, and troubleshoot Windows desktops, laptops, and peripherals.
- Assist with basic Windows Server tasks including user account management, group policies, permissions, and routine maintenance.
- Monitor system performance and escalate issues as needed.
- Support incident tracking and documentation through the ticketing system.
- Help maintain inventory of IT assets and equipment.
- Contribute to onboarding and offboarding processes (accounts, equipment, access).
- Communicate clearly and professionally with end users, technical staff, and management.
- Follow established IT procedures and contribute to improvements where appropriate.
Salary Range: $70,000 - $90,000 annually.
Benefits
- Dental and Vision Insurance
- Medical Insurance to Include HSA, FSA, and DFSA Plans
- Life and AD&D coverage
- Employee Assistance Program (EAP)
- 401(k) Plan with Company Matching Contributions
- 160 Hours of Paid Time Off (PTO)
- 12 (Floating) Holidays
- Educational Assistance
- Highly Competitive Salary
What this role asks for
Particular to this role
Active Directory · Networking · Windows Server
Rare in Sigma Defense's other 37 open postings.
87% of this description is written for the role. The rest is Sigma Defense's standard text, folded away below.
Compared with Sigma Defense's other open jobs.
The team: IMS (IMSENG, IMSPRG, IMSNM, IMST&R)
This role is one of 12 open in IMS (IMSENG, IMSPRG, IMSNM, IMST&R). 11 were posted in the last 30 days.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Cybersecurity (7 of 12), Linux (6 of 12), Cisco (5 of 12), Python (5 of 12), VMware (5 of 12), Ansible (3 of 12), PowerShell (3 of 12)
OTHER ROLES ON THIS TEAM
- 1784 - Network Security Engineer III posted Oct 28
- 1785 - Network Security Engineer II posted Oct 28
- 1519 - Systems Engineer III posted Oct 27
- 1778 - Web Developer posted Oct 27
- 1760 - Application Developer posted Oct 27
- 1520 - Network Engineer I - III posted Oct 27
- 1335 - Systems Engineer III posted Oct 27
- 1655 - Senior Software Developer posted Oct 21
- 1699 - Network Engineer IV posted Oct 21
- 1783 - IT Program Manager posted Oct 20
- 1751 - Senior Systems Analyst: Training Technical Assessment SME posted Sep 15
From the team and dates on Sigma Defense's own job board.
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