Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior System Administrator

$190k - $210k

Cornerstone Defense

  • Location: Annapolis Junction, Maryland
  • Type: Contract
  • Job #3710
Title: Senior System Administrator
Location: Annapolis Junction, MD
Compensation Range: $190 -$210K

*Clearance: *Active TS/SCI w/ Polygraph needed to apply *

Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation's toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don't look any further than Cornerstone Defense.


Benefits Overview :
Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: Medical, Dental and Vision Plans * Generous PTO Policy * 401(k) * HSA and FSA options * Life and Disability Insurance * Tuition Reimbursement and Training * Perks at Work Discount Program * Referral Program * Leads Generation Program * CollegeAmerica 529 * Fitness Reimbursement Program * Travel Assistance * Norton Lifelock Benefit Solutions * Life Planning Financial & Legal Services *



Description:
As a collaborative member of a small and mostly autonomous team, this position directly supports secure enclave development networks.

Core Tasks:
  • Conduct functional and connectivity testing to ensure continuing operability.
  • Develop and document systems administration standard operating procedures.
  • Maintain baseline system security according to organizational policies.
  • Manage accounts, network rights, and access to systems and equipment.
  • Plan, execute, and verify data redundancy and system recovery procedures.
  • Install, update, and troubleshoot systems and servers.
  • Comply with organization systems administration standard operating procedures.
  • Implement and enforce local network usage policies and procedures.
  • Manage system and server resources including performance, capacity, availability, serviceability, and recoverability.
  • Monitor and maintain system and server configurations.
  • Perform repairs on faulty system and server hardware.
  • Troubleshoot hardware/software interface and interoperability problems.
Required :
  • Bachelor's degree in technical discipline and 15 years' experience as a System Administrator, OR High school diploma and 20 years' experience as a System Administrator
  • Experience with Windows Sever Administration, Active Directory, and Group Policy
  • Familiarity with Linux Server Administration
  • Familiarity with Broadcom VMware/ESXi, Broadcom VMWare Virtual Networking, and Broadcom VMware vCenter
  • Networking Switching and Router Management
  • Storage Management (NetApp)
  • Hardware and Operating System troubleshooting
  • System hardening
  • Security Compliance Scanning (Nessus, ACAS)
  • Understanding of project design within the scope of security (RMF) requirements
  • Active DoD IAT Level II certification (Security+)
  • Ability to demonstrate cyber/IT related experience with attention to detail, customer service, oral and written communication, and problem solving.
Preferred:
  • Experience leading the implementation and support of Broadcom VMware virtualized systems and infrastructure
  • PowerCLI
  • Broadcom VMware Aria Suite, formerly called vRealize Suite
  • Broadcom VMware Cloud Foundation (VCF)
  • Broadcom VMware Certified Professional or other relevant VMware certification.
Title: Senior System Administrator
Location: Annapolis Junction, MD
Compensation Range: $190 -$210K

*Clearance: *Active TS/SCI w/ Polygraph needed to apply *

Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation's toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don't look any further than Cornerstone Defense.


Benefits Overview :
Cornerstone Defense offers a very comprehensive benefits package including, but not limited to: Medical, Dental and Vision Plans * Generous PTO Policy * 401(k) * HSA and FSA options * Life and Disability Insurance * Tuition Reimbursement and Training * Perks at Work Discount Program * Referral Program * Leads Generation Program * CollegeAmerica 529 * Fitness Reimbursement Program * Travel Assistance * Norton Lifelock Benefit Solutions * Life Planning Financial & Legal Services *



Description:
As a collaborative member of a small and mostly autonomous team, this position directly supports secure enclave development networks.

Core Tasks:
  • Conduct functional and connectivity testing to ensure continuing operability.
  • Develop and document systems administration standard operating procedures.
  • Maintain baseline system security according to organizational policies.
  • Manage accounts, network rights, and access to systems and equipment.
  • Plan, execute, and verify data redundancy and system recovery procedures.
  • Install, update, and troubleshoot systems and servers.
  • Comply with organization systems administration standard operating procedures.
  • Implement and enforce local network usage policies and procedures.
  • Manage system and server resources including performance, capacity, availability, serviceability, and recoverability.
  • Monitor and maintain system and server configurations.
  • Perform repairs on faulty system and server hardware.
  • Troubleshoot hardware/software interface and interoperability problems.
Required :
  • Bachelor's degree in technical discipline and 15 years' experience as a System Administrator, OR High school diploma and 20 years' experience as a System Administrator
  • Experience with Windows Sever Administration, Active Directory, and Group Policy
  • Familiarity with Linux Server Administration
  • Familiarity with Broadcom VMware/ESXi, Broadcom VMWare Virtual Networking, and Broadcom VMware vCenter
  • Networking Switching and Router Management
  • Storage Management (NetApp)
  • Hardware and Operating System troubleshooting
  • System hardening
  • Security Compliance Scanning (Nessus, ACAS)
  • Understanding of project design within the scope of security (RMF) requirements
  • Active DoD IAT Level II certification (Security+)
  • Ability to demonstrate cyber/IT related experience with attention to detail, customer service, oral and written communication, and problem solving.
Preferred:
  • Experience leading the implementation and support of Broadcom VMware virtualized systems and infrastructure
  • PowerCLI
  • Broadcom VMware Aria Suite, formerly called vRealize Suite
  • Broadcom VMware Cloud Foundation (VCF)
  • Broadcom VMware Certified Professional or other relevant VMware certification.
Vacancy posted 5 days ago
Similar jobs that could be interesting for youBased on the Senior System Administrator in Annapolis, MD vacancy
  •  ...Senior System Administrator • Be a member of a system administration team responsible for the design, deployment, installation, configuration and maintenance of Linux/UNIX-based server systems and software. • Be able to learn quickly and work independently as well as... 
    Senior

    Implify

    Annapolis, MD
    3 days ago
  •  ...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... 
    Senior
    Visa sponsorship
    Work visa

    Gigatec Engineering

    Annapolis, MD
    1 day ago
  • $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

    Peterson Technologies

    Annapolis, MD
    5 days ago
  • $70k

     ...sustaining, operating, and improving essential government systems and services, with proven operational excellence, and a commitment...  ...without dual citizenship. This role is remote. The Senior System Administrator provides senior-level IT operations and ServiceNow... 
    Senior
    Contract work
    Remote work

    MAXIMUS

    Annapolis, MD
    1 day ago
  •  ...Que Technology Group, Inc., is seeking Senior System Administrator to provide High Performance Computing (HPC) services in the form of enhanced HPC sustainment capabilities. These capabilities include Multi-vendor HPC servers, HPC clusters, and SPD servers.... 
    Senior
    Temporary work
    Immediate start

    Que Technology Group

    Annapolis, MD
    2 days ago
  • $115k - $175k

     ...a small company with the impact of a big mission. Riverstone is seeking a motivated, career, and customer-oriented Senior Systems Administrator to join our team at Annapolis Junction, Maryland . This is an onsite position. Primary Responsibilities: • Provides... 
    Senior
    Hourly pay
    Contract work
    Work experience placement

    Envision Innovative Solutions

    Annapolis, MD
    8 days ago
  • $96.2k - $192.3k

    Accenture Federal Services in Annapolis Junction, MD is looking for an experienced Systems Administrator. The ideal candidate will provide support for IT systems, manage infrastructure, and troubleshoot issues. A minimum of ten years of experience in similar roles as well... 
    Senior

    Accenture Federal Services

    Annapolis, MD
    2 days ago
  •  ...Que Technology Group, Inc., is seeking a Senior System Administrator to provide High Performance Computing (HPC) services in the form of HPC enhanced sustainment capabilities. Responsibilities include, but are not limited to: Provide support for implementation... 
    Senior
    Temporary work
    Immediate start

    Que Technology Group

    Annapolis, MD
    2 days ago
  • LVMH Group is seeking a Senior Systems Administrator for the Planning and Engineering Department in Maryland. The successful candidate will support the DC network, maintain production systems, and utilize their extensive knowledge in logistics processes. Key responsibilities... 
    Senior

    LVMH Group

    Annapolis, MD
    5 days ago
  • $170k - $175k

    A leading technology consulting firm is seeking a Senior System Administrator with an active TS/SCI clearance and polygraph. The role involves implementing and maintaining IT systems, providing Tier 1 and Tier 2 support, and managing daily operations across various environments... 
    Senior

    Innovativesystems

    Annapolis, MD
    3 days ago
  • Amentum is seeking a System Administrator 2 in Maryland to provide Tier 1 and Tier 2 support for PKI tools. This role involves troubleshooting, testing new releases, and ensuring compliance with DoD certifications. Ideal candidates should have a background in both Windows... 
    Senior

    Amentum

    Annapolis, MD
    2 days ago
  • $10k

     ...Description When You Love the Work You Do, Any Mission Is Possible Position: Senior System Administrator - CNO Capabilities ***(Active Clearance with a Polygraph is Required) We're on multiple contracts and have many opportunities. It is encouraged if applicants... 
    Senior
    Extra income
    Work at office
    Flexible hours

    Tiber Technologies Inc

    Annapolis, MD
    2 days ago
  • $122k - $253k

    Nightwing is seeking a System Administrator in Annapolis, Maryland, with 15 years of experience in IT support. The role includes troubleshooting, optimization, and managing IT systems while providing user support and ensuring compliance with security standards. The ideal... 
    Senior

    Nightwing

    Annapolis, MD
    3 days ago
  • A leading technology firm in Maryland seeks a Senior System Administrator to provide High Performance Computing services. The ideal candidate must have a Bachelor's degree in a technical discipline and at least 10 years of relevant experience. Responsibilities include IT... 
    Senior

    Que Technology Group

    Annapolis, MD
    1 day ago
  • Cornerstone Defense LLC is seeking an Expert System Administrator in Annapolis Junction, MD. Candidates must have an active TS/SCI clearance and a minimum of 15 years of experience in system administration. The role entails supporting the implementation and maintenance... 
    Senior

    Cornerstone Defense LLC

    Annapolis, MD
    3 days ago
  • A technology services provider is seeking a Senior System Administrator to deliver enhanced High Performance Computing services. This role involves troubleshooting and managing IT systems, ensuring optimal performance for various devices. The ideal candidate will have ten... 
    Senior

    Que Technology Group

    Annapolis, MD
    1 day ago
  • HRB is looking for a System Administrator III located in Annapolis Junction, MD. The role requires TS/SCI clearance and involves managing IT systems, providing day-to-day support, and optimizing system performance. Ideal candidates will have ten years of experience in... 
    Senior

    HRB

    Annapolis, MD
    3 days ago
  • Power3 Solutions is seeking a System Administrator III to provide support for the implementation and maintenance of IT systems. This role includes troubleshooting and managing infrastructure while ensuring optimal performance. The ideal candidate will have at least ten... 
    Senior

    Power3 Solutions

    Annapolis, MD
    3 days ago
  • $125k - $180k

     ...Modern Technology Solutions, Inc. (MTSI) is hiring a Senior Systems Administrator in Annapolis Junction, Maryland. Qualified candidates must be U.S. citizens with a TS/SCI clearance and Full Scope Polygraph. Responsibilities: *Provide support for implementation... 
    Senior
    Full time
    Contract work
    Immediate start
    Worldwide
    Flexible hours

    Modern Technology Solutions Inc

    Annapolis, MD
    4 days ago
  • A technology firm is seeking a Senior System Administrator to manage CNO capabilities and foster a high-performance operational IT environment. The ideal candidate must be a U.S. citizen with an active clearance and possess a Bachelor’s degree in a relevant field. This... 
    Senior

    Tiber Technologies

    Annapolis, MD
    1 day ago
  • Power3 is looking for a System Administrator III in Annapolis Junction, MD. The candidate will provide support for implementation, troubleshooting, and maintenance of IT systems while managing system infrastructure. Responsibilities include Tier 1 and Tier 2 problem resolution... 
    Senior

    Power3

    Annapolis, MD
    2 days ago
  • $172k - $210k

    A technology services firm is seeking a Systems Administrator with extensive experience in Linux and Windows environments. Candidates must be US citizens with an active TS/SCI security clearance. Responsibilities include supporting users, documenting security processes,... 
    Senior

    Constellation Technologies, Inc

    Annapolis, MD
    5 days ago
  • $107k - $143k

     ...Senior System Administrator Job Locations US-TN-Arnold AFB Requisition Number 2026-24029 Category Information Technology Category Information Technology Overview Job Title: Senior System Administrator Location... 
    Senior
    Full time
    Part time
    H1b
    Local area

    Beyond New Horizons

    Arnold, MD
    1 day ago
  • 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 support mission‑critical operations? BigBear.ai is seeking... 
    Senior

    Bigbear.ai

    Annapolis, MD
    1 day ago
  • $120.8k - $265.8k

    Job Title: Senior Systems Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local The Opportunity CACI is seeking... 
    Senior
    Full time
    Contract work
    Work experience placement
    Local area
    Immediate start
    Flexible hours

    CACI International Inc

    Annapolis, MD
    3 days ago
  • Que Technology Group, Inc., is seeking a Senior System Administrator to provide High Performance Computing (HPC) services in the form of HPC enhanced sustainment capabilities. Responsibilities Provide support for implementation, troubleshooting and maintenance of IT systems... 
    Senior
    Temporary work
    Immediate start

    Que Technology Group

    Annapolis, MD
    1 day ago
  • $90k - $120k

    Responsibilities As a Senior Systems Administrator with Sabre Systems you will be designing, deploying, and sustaining modernized Software Development Environments (SDE) within the current Cyber framework. This is a full time, in person role located at the Naval Air Station... 
    Senior
    Full time
    Contract work
    For contractors

    Sabre Systems

    Annapolis, MD
    1 day ago
  • $128k - $160k

    Responsibilities & Qualifications RESPONSIBILITIES The Senior Systems Administrator is expected to be able to accomplish the following: Monitors and manages system resources, including CPU usage, disk usage, and response times to maintain operating efficiency. Performs... 
    Senior
    Full time
    Contract work
    Temporary work
    Local area
    Shift work

    TekSynap

    Annapolis, MD
    4 days ago
  • Innovative Systems & Solutions | Full time - Onsite Senior System Administrator - FFPP-8802 Annapolis Junction, United States | Posted on 03/17/2026 Innovative Systems & Solutions (ISS) works with a wide spectrum of talent to establish an atmosphere that stimulates creativity... 
    Senior
    Full time
    Temporary work
    Local area
    Immediate start

    Innovativesystems

    Annapolis, MD
    3 days ago
  • $170k - $250k

    Job Description The System Administrator III is a senior technical contributor responsible for designing, implementing, securing, and maintaining the organization’s core IT infrastructure. This role provides Tier 3 support for complex incidents, leads infrastructure projects... 
    Senior
    Permanent employment
    Contract work
    Work experience placement
    Local area

    AV

    Annapolis, MD
    5 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior System Administrator. Be the first to apply!