Senior System Administrator
Omniscius Consulting
We are seeking an experienced Senior Systems Administrator to support the lifecycle sustainment and modernization of mission-critical education, learning, and training applications supporting a Government enterprise. This role is ideal for an experienced systems administrator with expertise in Windows and Linux administration, cloud infrastructure, automation, and enterprise operations. As part of a collaborative engineering team, you will administer hybrid environments, implement automation solutions, perform system maintenance, and ensure the security, reliability, and availability of enterprise systems supporting national security missions. Position Overview The Senior Systems Administrator will provide advanced systems administration for enterprise Windows and Linux environments spanning on-premises and AWS cloud infrastructure. Responsibilities include IAVA patching, operating system maintenance, infrastructure automation, cloud administration, PowerShell scripting, and Infrastructure as Code (IaC) initiatives supporting highly available enterprise systems. Location: Laurel, MD Schedule: Full-Time, Onsite Clearance Required: Active TS/SCI with Full Scope Polygraph Responsibilities Administer and maintain enterprise Windows Server and Linux environments across hybrid infrastructures. Perform IAVA patching, vulnerability remediation, and compliance reporting for enterprise systems. Execute operating system patching, upgrades, maintenance, and software deployments for Windows and Linux servers. Troubleshoot complex hardware, operating system, and application issues while maintaining system availability. Implement and manage Windows Group Policy Objects (GPOs) to support enterprise security and configuration standards. Develop and maintain PowerShell scripts to automate administrative and operational tasks. Support AWS cloud environments utilizing services such as EC2, Lambda, CloudFormation, and cloud-native scripting. Develop Infrastructure as Code (IaC) solutions using Terraform and Ansible for provisioning, configuration management, and automation. Build and maintain automation tools and system scripts that improve operational efficiency and system reliability. Perform software installation, upgrades, maintenance, and lifecycle support for enterprise applications. Collaborate with software developers, cloud engineers, cybersecurity personnel, and infrastructure teams to support mission-critical systems. Develop technical documentation, operational procedures, and system administration best practices. Support continuous improvement initiatives that enhance enterprise security, automation, and system performance. Required Qualifications Active TS/SCI with Full Scope Polygraph. Bachelor's degree in Computer Science, Information Technology, Engineering, or a related technical discipline. Minimum of 15 years of Systems Administration experience supporting programs of similar scope, complexity, and technical requirements. Five additional years of relevant experience may substitute for a bachelor's degree. Extensive experience administering Windows Server environments, including hardening, patching, upgrades, and disk management. Experience administering Linux server environments, including patching, software maintenance, and operational support. Experience performing IAVA patching and compliance reporting. Experience maintaining and upgrading enterprise software applications. Experience supporting both on-premises and cloud-hosted enterprise environments. Strong troubleshooting, analytical, and problem-solving skills. Ability to work during required core business hours. DoD 8570 Information Assurance Technical (IAT) Level I certification is required. Preferred Qualifications PowerShell scripting
AWS EC2
AWS Lambda AWS CloudFormation Terraform Ansible Infrastructure as Code (IaC) Windows Group Policy (GPO) Enterprise automation Hybrid cloud infrastructure Windows Server administration Linux administration Enterprise patch management Experience supporting Department of Defense or Intelligence Community customers. #J-18808-Ljbffr Omniscius Consulting$170k - $220k
Worker Type Regular Job Description Summary The primary role of the System Administrator is to manage and support mission-critical IT infrastructure. This role involves day-to-day operations, troubleshooting, and maintenance across Windows and UNIX systems. You'll...SeniorPermanent employmentFull timeContract workWork experience placementLocal area- ...Senior System Administrator SITEC is seeking a Senior Systems Administrator to support lifecycle sustainment activities for commercial and custom-developed education, learning, and training applications. This role will join an existing technical team responsible for...Senior
$77.6k - $176k
Job Number: R0232223 System Administrator, Senior The Opportunity Your technical expertise makes the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting the Department of Defense? We're looking for a System...SeniorLocal area$164k - $200k
...Responsibilities Perform IAVA patching and reporting across enterprise systems. Maintain and administer Windows Server (various versions)... ...(GPOs) and perform PowerShell scripting for automation and administrative tasks. Utilize AWS services, including EC2, Lambda functions...Senior$164k - $200k
Belay Technologies is seeking a Senior System Administrator to join our intel team. You will support CNO Capabilities as a senior System Administrator and technical contributor responsible for sustaining and evolving a high-performance operational IT environment. This is...SeniorContract workWork at officeRelocation- ...Senior System Administrator for a funded role with quantifiable Linux system administration work experience to support a mission‑focused team. Position requires an active TS/SCI with Polygraph level clearance. US citizenship is required. Required Skills Linux Vmware Harvester...SeniorTemporary workWork experience placementLocal areaImmediate start
$123k - $146k
Overview Senior System Administrator for Advanced Security Operations Capabilities Join our team as a senior System Administrator responsible for sustaining and evolving a high-performance operational IT environment in support of advanced security operations. This role...SeniorRelocation- ...Job Description Job Description Overview Senior Systems Administrator Location: On-Site at Customer Location (Annapolis Junction, MD) Clearance Required: TS/SCI with Poly Are you ready to take your systems administration expertise to the next level and...Senior
- ...McLean, VA . We currently have an immediate opening for a Sr. Systems Administrator to support our contract in Lanham, MD. Our government... ...requirement to provide support in Infrastructure Management for a Senior System Administrator, with strong Microsoft Hyper‑V...SeniorContract workWork at officeImmediate startRemote workMonday to Friday
- ...is proud to offer career growth opportunities and a competitive compensation and benefits package. Visit our website at: Senior System Administrator Candidate must have an active TS/SCI w/Poly The Senior System Administrator will maintain data files and control...SeniorFlexible hours
- ...to sponsor an employment Visa. What You’ll Be Doing (We don’t love the bullet points, but we love the work!) As the System Administrator, you'll get to be responsible for providing network management and systems administration support to maintain the Agency’s High...SeniorVisa sponsorshipWork visa
$168k - $250k
...information theft and augment protections for our customers systems. If you are looking to join a company that provides... ...consider joining our team! Peterson is seeking a talented Senior Systems Administrator . Provides day to day systems administration and support...Senior- ...Job Description Job Description Description: The role of the System Administrator includes supporting the implementation, troubleshooting, and upkeep of Information Technology (IT) systems. This involves overseeing the IT system infrastructure and associated processes...Senior
- ...Requirements: ~ Security+ Cert ~20 years experience as a system engineer ~ Bachelor’s degree in a technical discipline ~5... ...support across all levels (both in-person and via phone) Systems Administration: Linux Server administration alongside Windows 10/11 and...SeniorFull timeImmediate startRemote workShift work
$140k - $185k
...information theft and augment protections for our customers systems. If you are looking to join a company that provides... ...consider joining our team! Peterson is seeking a talented Senior Systems Administrator . Seeking an SA to provide support for the design, planning...Senior$103.8k - $218.1k
Job Title: Senior System AdministratorJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/... ...Capability to obtain privileged system access. Desired Linux administration (CentOS, RedHat). Docker and Kubernetes. Harbor container...SeniorContract workFor contractorsWork experience placementFlexible hours- Analytica is seeking a seasoned and adaptable Senior System Administrator to join our infrastructure team in supporting an innovative federal mission. In this role, you will provide high-level technical leadership, engineering expertise, and strategic vision to optimize...SeniorFor contractorsLocal area
- ...Job Description Job Description Senior HPC Systems Administrator Omega Enterprise Solutions is a Maryland-based, Service-Disabled Veteran-Owned Small Business (SDVOSB) with a special focus on the U.S. Department of Defense (DoD) and Intelligence Community (IC...SeniorFull time
- ...Job Description Job Description Job Description Vetegrity is looking for System Administrators with 15+ years if experience. This Position requires a TS/SCI with a Full Scope Polygraph. See more details below. Job Duties: - Provide support for implementation...SeniorTemporary workLocal area
$100k
Description Are you passionate about shaping secure, IT systems in classified environments? Do you want to influence system improvements... ...you to join our team at APL! We are seeking a Linux System Administrator to join the RF Engineering group to support Hardware-in-the-...SeniorTemporary workInterim roleFlexible hours- Overview ManTech seeks a motivated, career and customer-oriented Linux System Administrator to join our team in Laurel, MD. You will be part of a dedicated team delivering enterprise infrastructure capabilities for a global workforce that supports a wide range of national...SeniorWork at office
$120k - $130k
...support Within the last 7 years, at least 5 of the years of experience must have been with modern digital/optical telecommunications systems and protocols, telephony switching system networks, and/or internet communications Job Description: Come join a dynamic, fast...SeniorFull timeImmediate startRemote workFlexible hoursShift workDay shiftAfternoon shift$95k - $230k
...Description Job Description Salary: $95,000 - $230,000 Location: Annapolis Junction, Maryland Category: Systems Administrator Level - Mid-Senior Travel Required:No Remote Type: No Clearance: TS/SCI w/ Polygraph **Position is contingent upon contract...SeniorContract workTemporary workWork experience placementImmediate startRemote work- ...Systems Administrator 1 Location Annapolis Junction, MD Job Code 2149 of Openings 1 Apply Now ( DCCA is a veteran-owned IT business specializing in providing innovative solutions to a variety of government agencies and commercial enterprises since 1982. DCCA...Flexible hours
$94k - $104.6k
...values your technical ambition? Join us and experience a company where your contributions truly make a difference! System Administrator II needed! Group: Remote Operations, Tier 2 team Must have TS/SCI with active polygraph. Hours: Wed-Sun, 2pm...Contract workWork experience placementImmediate startRemote workWorldwide- ...System Administrator Annapolis Junction, MD ( -ACS Description Athenix Solutions Group is looking for a System Administrators a variety... ...a technical field, and 10 years of relevant experience Senior Level - Bachelor's degree in a technical field, and 15...Remote work
$128k - $214.4k
...Your adventure begins now-unleash your potential with MANTECH! MANTECH is seeking a highly motivated and collaborative System Administrator to join our team in Laurel , MD . In this role, you will develop, maintain, and enhance complex and diverse software...Hourly payContract workTemporary workWork experience placementWork at officeLocal areaRemote work$96.2k - $192.3k
...System Administrator At Accenture Federal Services, nothing matters more than helping the US federal government make the nation stronger and safer and life better for people. Our 13,000+ people are united in a shared purpose to pursue the limitless potential of technology...$10k
...is rare within our industry. Provides support for implementation, troubleshooting and maintenance of Information Technology (IT) systems. Manages IT system infrastructure and any processes related to these systems. Provides support to IT systems including day-to-day...Hourly payContract workTemporary workWork experience placementSummer workImmediate start- ...contracts. Come be part of a family and team that makes a difference for tomorrow today! Desired Skills: The Level 2 System Administrator (SA) shall possess the following capabilities: Provide support for implementation, troubleshooting and maintenance of IT...
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