Lead Systems Administrator

Job Overview

General information Requisition # R67820 Locations USA-Remote Work Posting Date 05/18/2026 Security Clearance Required Secret Remote Type Fully Remote Time Type Full time & 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.

Job Description

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 Lead Systems Administrator to join our CASTLE-NET Program team. This is a remote position .

Evaluating performance results and recommending major changes that affect short-term project growth and overall success.

Key Responsibilities

• Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact.
• MANTECH seeks a motivated, career and customer-oriented Lead Systems Administrator to join our CASTLE-NET Program team.
• Be a part of an agile team to provide innovative, customer focused, and cost-effective integrated enterprise IT support services in support of the client’s vision of engineering solutions for the Nation’s toughest challenges.
• Responsibilities include but are not limited to: Managing and maintaining the IT infrastructure to ensure reliability, performance, and security across Windows, Linux, and VMware environments.
• Planning and leading major technology assignments while providing leadership to ensure technical requirements and project objectives are met.
• Installing, configuring, and supporting servers and virtualized environments in close coordination with IT teams, application developers, and stakeholders.
• Interfacing with senior management regarding decision-making and domain knowledge that may have a critical impact on project implementation.
• Delivering world-class IT services and responsive customer support to exceed the expectations of USACE OCIO/G-6 IT end-users.

Required Skills and Qualifications

• General information Requisition # R67820 Locations USA-Remote Work Posting Date 05/18/2026 Security Clearance Required Secret Remote Type Fully Remote Time Type Full time & Requirements Shape the future of defense with MANTECH!
• Interfacing with senior management regarding decision-making and domain knowledge that may have a critical impact on project implementation.
• Minimum Qualifications: Bachelor’s degree in Information Technology or related field; or an Associate degree with 10+ years of experience; or 12+ years of relevant experience.
• Requires 8+ years of progressively responsible experience in systems administration for Windows, Linux, or VMware environments.
• Comprehensive knowledge of operating systems such as Windows Server, Red Hat, and CentOS, as well as virtualization technologies like VMware vSphere.
• Proficiency in scripting languages including PowerShell, Bash, or Python, and experience with system monitoring and performance tuning.
• Experience creating, maintaining, and communicating complex information technology documentation and system configurations.
• Must maintain a DoD 8140 IAT Level II certification to comply with mission security and baseline requirements.

Benefits and Perks

• 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.

Work Location and Schedule

This role is listed as Remote USA with location information shown as Remote USA. The employment type is Full Time.

About the Company

ManTech is the organization connected with this listing. USA Jobs Today displays this opportunity for job discovery only, so applicants should verify company details, application instructions, and eligibility on the official employer website.