Mid-Level System Administrator

SITEC Consulting•Lexington Park, MD

1d•Onsite

About The Position

SITEC Consulting is seeking motivated Junior and Mid-level Windows / Linux / VMware System Administrators to support a mission-focused government software hosting facility. This is an excellent opportunity for candidates who enjoy hands-on technical work across physical servers, virtual environments, operating systems, networking, security compliance, and customer support. In this role, you will help deploy, maintain, secure, and troubleshoot critical infrastructure supporting a variety of customer missions. The ideal candidate is technically curious, comfortable working in a secure government environment, and eager to contribute to system reliability, security posture, and long-term infrastructure improvements.

Requirements

Active Secret clearance with the ability to obtain a Top Secret clearance.
Ability to start with an interim Top Secret, if applicable.
U.S. Citizenship required.
4-8 years of hands-on experience with Windows and/or Linux system administration.
Experience with Risk Management Framework (RMF) compliance activities.
Hands-on experience with security scanning, STIG execution, vulnerability remediation, or related security hardening activities.
CompTIA Security+ certification.
Windows or Linux operating system certification.
Familiarity with Linux operating systems and virtual networking concepts.
Strong troubleshooting, documentation, and customer support skills.

Nice To Haves

VMware / vSphere / ESXi administration
Virtual networking
System backups and disaster recovery
Containers
Active Directory
Networking fundamentals and on-premises infrastructure support
Experience working in secure DoD or government environments

Responsibilities

Support day-to-day operations, maintenance, and engineering activities across Windows, Linux, VMware, and related infrastructure.
Deploying and maintaining physical and virtual hardware infrastructure, including virtual machines and containers.
Performing routine maintenance, configuration changes, and troubleshooting across servers, workstations, and IT equipment.
Installing, configuring, and supporting hardware and software in a secure enterprise environment.
Managing system backups, disaster recovery planning, user accounts, and permissions.
Deploying, maintaining, and troubleshooting software applications.
Supporting customers by resolving technical issues and providing guidance on best practices.
Maintaining documentation, including knowledge base articles, incident response actions, system configurations, and administration procedures.
Securing information systems and applications in accordance with current DoD guidance.
Supporting RMF compliance activities, including scanning, STIG execution, remediation tracking, and routine security reporting.
Maintaining system configuration and security posture through continuous monitoring.
Participating in project planning and execution using Agile methodologies.
Providing networking support for on-premises infrastructure, including virtual networking environments.