Senior System Administrator
SITEC Consulting
Job Description
Job Description
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 maintaining secure, reliable, and high-performing IT systems across hybrid on-premises and cloud-based environments.
The ideal candidate is a self-motivated Systems Administrator with strong Windows and Linux experience, hands-on patching and vulnerability remediation knowledge, and the ability to support mission-critical systems in a fast-paced DoD environment.
ResponsibilitiesThe Senior Systems Administrator will provide operational support, maintenance, troubleshooting, patching, automation, and system administration across enterprise Windows, Linux, and cloud-hosted environments. This position will support system reliability, security compliance, infrastructure modernization, and lifecycle sustainment activities.
Key Duties- Administer and maintain Windows Server and Linux server environments.
- Perform IAVA patching, vulnerability remediation, and compliance reporting across enterprise systems.
- Provide troubleshooting, maintenance, and operational support for on-premises and cloud-hosted IT environments.
- Execute system patching, software maintenance, upgrades, hardening, and disk management.
- Implement and manage Windows Group Policy Objects and Active Directory-related administration.
- Develop automation scripts using PowerShell, Bash, Python, or related scripting languages.
- Support AWS cloud infrastructure using services such as EC2, Lambda, CloudFormation, and IAM.
- Assist with infrastructure as code initiatives using Ansible and Terraform.
- Develop and maintain system automation tools to improve reliability, efficiency, and uptime.
- Work collaboratively with technical teams in a fast-paced, mission-focused environment.
- Active TS/SCI with Polygraph .
- 15 years of Systems Administration experience supporting programs of similar scope, type, and complexity.
- Bachelor's degree in a technical discipline; 5 additional years of SA experience may be substituted in lieu of a degree.
- DoD 8570 compliance with IAT Level I .
- Experience maintaining Windows Server environments, including hardening, patching, upgrades, and disk management.
- Experience administering Linux servers, including patching and software maintenance.
- Experience with IAVA patching and reporting.
- Experience maintaining and upgrading installed software across enterprise systems.
- Strong troubleshooting and problem-solving skills across computer systems and software.
- Strong hybrid Linux/Windows Systems Administration background.
- Hands-on experience with AWS services such as EC2, Lambda, CloudFormation, and IAM.
- Experience with automation and scripting tools including Ansible, Terraform, PowerShell, Bash, and Python.
- Experience with Active Directory and Group Policy Management.
- Understanding of cloud security practices, patch management, and compliance reporting.
- Ability to work independently and collaboratively in a fast-paced technical environment.
SITEC is an employee- and customer-focused Information Technology and Professional Services firm specializing in cybersecurity, software and systems engineering, systems administration, and lifecycle support services. We design, develop, and deliver mission-focused technology solutions that support the continuous operation and modernization of critical customer platforms.
Job Posted by ApplicantProVacancy posted 18 days ago
Similar jobs that could be interesting for youBased on the Senior System Administrator in Annapolis Junction, MD vacancy
- ...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...SeniorFull time
Omniscius Consulting
Laurel, MD3 days ago $164k - $200k
...Belay Technologies is seeking a Senior System Administrator to join our intel team. Join a team providing Life Cycle Sustainment (LCS) and modernization activities for commercial and custom-developed education, learning, and training applications supporting the Government...SeniorBelay Technologies
Laurel, MD3 hours ago$77.6k - $176k
...System Administrator, Senior Your technical expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve a critical technology supporting the Department of Defense (DoD)? We’re looking for a System Administrator to...SeniorContract workLocal areaBooz Allen Hamilton
Laurel, MD4 days ago$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...SeniorContract workWork at officeRelocationBelay Technologies
Laurel, MD4 days ago- ...MANTECH seeks a motivated, career- and customer-oriented Sr Cloud System Administrator to join our team in Annapolis Junction, MD. Our team delivers enterprise infrastructure capabilities for a global workforce performing a wide range of missions in defense of...SeniorWork at office
ManTech
Annapolis Junction, MD2 days ago $77.6k - $176k
System Administrator, Senior The Opportunity: Your technical expertise makes you 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 Administrator...SeniorFull timeContract workPart timeWork at officeLocal areaRemote work- ...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
DCCA
Columbia, MD15 hours ago - ...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
Vibrint
Hanover, MD3 days ago $103.8k - $218.1k
...Senior System Administrator Join CACI as a key contributor on the MWIII Bridge program, where mission meets innovation. As a Prime Contractor, CACI delivers next‑generation Identity, Credential, and Access Management (ICAM) capabilities across the Intelligence Community...SeniorContract workFor contractorsWork experience placementFlexible hoursCACI International
Hanover, MD4 days ago$77.6k - $176k
...another. What if you could use those skills to improve the technology supporting the Department of Defense? We’re looking for a System Administrator to help us design, deploy, and maintain Cross Domain Solutions for an enterprise environment that supports critical...SeniorFull timeContract workPart timeWork at officeLocal areaRemote workBooz Allen Hamilton
Columbia, MD3 days ago$10k
...technology allowances, and access to a state-of-the-art technology lab. Learn more at Your Mission ClearEdge is hiring a Senior System Administrator to support the administration, sustainment, and security of Linux-based systems across mission environments. In this role...Senior- ...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
- ...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
$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$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- ...’s safety and security. Make an impact by using your expertise to protect our country from threats. Job Description SYSTEMS ADMINISTRATOR SME Advance how our customers operate while you advance your career. Join GDIT as a Systems Administrator SME and build an...Senior
- ...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
- System Administrator - Level III Location: Columbia, MD Employment Type: Full-time Experience Level: Senior (9+ years) Security Clearance: Active TS/SCI with polygraph required Position Overview The selected candidate will serve as a System Administrator supporting mission...SeniorFull timeContract workTemporary workWork at officeRelocationFlexible hours
- ...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
$164k - $200k
...Journal's (BBJ) Best Places to Work 2019, runner up in 2020 and a finalist in 2021! Belay Technologies is seeking a Senior System Administrator to join our intel team. Join a team providing Life Cycle Sustainment (LCS) and modernization activities for commercial...SeniorFull timeContract workWork experience placementFlexible hours$98.1k - $228.6k
...passionate about what they do, committed to our shared values and dedicated to our customers’ mission. AT&T has an opening for a Senior System Administrator to support operations by maintaining, documenting, and administering enterprise IT systems. This role is the Senior...SeniorTemporary workWork at officeLocal areaRelocationAT&T
Columbia, MD3 days ago$92.3k - $166.85k
...Description Leidos has a new and exciting opportunity for a Senior Linux Systems Administrator in our Intelligence Sector’s, Cyber & Analytics Business Area (CABA) . Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO...SeniorLocal areaImmediate startRelocation packageFlexible hoursLeidos
Annapolis Junction, MD20 hours ago$100k
...Description Are you passionate about shaping secure, IT systems in classified environments? Do you want to influence system improvements... ...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 workWork experience placementInterim roleRelocation packageFlexible hoursThe Johns Hopkins University Applied Physics Laboratory
Laurel, MD20 hours ago$128k - $214.4k
...Linux System Administrator Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking...SeniorHourly payContract workTemporary workWork experience placementWork at officeLocal areaRemote workManTech
Laurel, MD2 days ago$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‑...SeniorInterim role$100k
...to scalable solutions in a complex secure setting As a Senior Linux Systems Engineer... You will troubleshoot Linux Servers and... .... Have 5+ years' experience as a Linux System Administrator. Experienced in automated deployment of Red Hat Enterprise...SeniorTemporary workWork experience placementInterim roleRelocation packageFlexible hoursThe Johns Hopkins University Applied Physics Laboratory
Laurel, MD4 days ago$100k
...the Atlassian Suite, Cobbler, and Ansible. Assist in monitoring systems, antivirus, security and logging using tools such as... ...of experience. Have 5+ years of experience as a Linux System Administrator. Experience in automated deployment of Red Hat Enterprise Linux...SeniorInterim role- ...Intelligence Community (IC), Department of Defense (DoD), and Defense Information Systems Agency (DISA). RBR-Technologies has an immediately available opening for a Sr. System Administrator to support our customer. Responsibilities Conduct functional and connectivity...SeniorContract workLocal areaImmediate startFlexible hours
$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
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior System Administrator. Be the first to apply!
Related searches
- systems administrator Annapolis Junction, MD
- computer systems administrator Annapolis Junction, MD
- microsoft systems administrator Annapolis Junction, MD
- IT administrator Annapolis Junction, MD
- system admin Annapolis Junction, MD
- IT infrastructure administrator Annapolis Junction, MD
- remote systems administrator Annapolis Junction, MD
- hpc system administrator Annapolis Junction, MD
- application system administrator Annapolis Junction, MD
- server administrator Annapolis Junction, MD