Systems Administrator

General information

Requisition #

R69935

Locations

USA-VA-Alexandria

Posting Date

08/10/2026

Security Clearance Required

TS/SCI

Remote Type

Onsite

Time Type

Full time

Description & Requirements

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we've been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now-protect and innovate with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Systems Administrator to support our Department of War contract out of Alexandria, VA to support the administration, maintenance, and operation of enterprise information systems within a secure Microsoft environment.

Job Responsibilities include but are not limited to:

• The Systems Administrator will be responsible for providing Tier II and Tier III technical support while ensuring the availability, reliability, and security of enterprise systems.

• Administering Windows servers, workstations, Microsoft 365 services, virtualization platforms, and enterprise applications. Windows 11, Server 2016/2019/2022.

• Administer Active Directory, Group Policy, DNS, DHCP, file shares, and print services. Support Microsoft 365 services, including Outlook, Teams, OneDrive, and SharePoint.

• Provide Tier II and Tier III technical support for desktop, server, and enterprise application issues.

• Diagnose and resolve hardware, software, operating system, network, and account-related problems.

• Apply operating system and application patches using Ivanti or similar enterprise management tools. Perform vulnerability remediation based on ACAS scan results and security guidance. Implement Security Technical Implementation Guides (STIGs) and system hardening procedures.

• Administer VMware virtual machines. Support Microsoft Azure virtual machines and cloud-based services.

• Travel is required between Alexandria, VA and Arlington, VA locations.

Minimum Qualifications:

• Bachelor's Degree and at least 5 years of related systems administration experience (additional 2 years of experience may be substituted in lieu of degree.

• Security+ Certification

• Experience supporting enterprise Microsoft environments at a Tier II level

• Virtualization experience with VMware vSphere

• Experience with vulnerability remediation based on ACAS scan results and security guidance with the ability to implement Security Technical Implementation Guides (STIGs) and system hardening procedures.

Preferred Qualifications:

• Microsoft Azure certified

• Microsoft 365 certified

• VMware Certified Professional (VCP)

Security Clearance Required:

• Must have a current / active Top Secret/ SCI clearance.

Physical Requirements:

• Sedentary work

The projected compensation range for this position is $128,000.00-$214,400.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.