CyberSecurity/SysAdmin
Cornerstone Defense
Active Secret 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. 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 *
Network Infrastructure
Networking concepts, protocols, and security methodologies
Network traffic flow (TCP/IP, OSI, ITIL)
Performance tuning tools and techniques
Remote access technologies
Network protocols (TCP/IP, DHCP, DNS, directory services)
File system implementations (NTFS, FAT, EXT)
IT security principles (firewalls, DMZs, encryption)
Network security architecture (topology, protocols, defense-in-depth)
Cybersecurity principles, threats, and vulnerabilities
National/international cybersecurity laws, regulations, and policies
Organizational IT security policies (account management, access control)
Data security standards (PII, PCI, PHI)
System administration, network, and OS hardening techniques
Software-based protection tools (firewalls, antivirus, anti-spyware)
Enterprise IT architecture
Cloud Computing
Service models (SaaS, IaaS, PaaS)
Deployment models (private, public, hybrid)
Cloud security strategy and architecture
$105.1k - $231.1k
Job Title: Sr. Systems AdministratorJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee... ...* * *The Opportunity:CACI is seeking an experienced Systems Administrator V to support the Navy Maritime Maintenance Enterprise Solution...SuggestedContract workWork experience placementWorldwideFlexible hours$90k
...Exceptional Performance ! Chenega Services & Federal Solutions, a Chenega Professional Services company, is looking for an IT Systems Administrator to provide network infrastructure support services to the Department of the Navys Commander, Operational Test and...Suggested$85k - $95k
...Systems Administrator Bowhead seeks a Systems Administrator to join our team at Naval Surface Warfare Center located at Joint Expeditionary Base Little Creek-Fort Story. Responsibilities Support the IT team by responding to users' requests in the form of email...Suggested$100.05k - $166.75k
...Systems Administrator IV Location US-VA-Norfolk ID 2026-11379 Category Systems Administrator Position Type Regular Full-Time Application Open Date 7/28/2026 Salary Statement Estimated Starting Salary Range...SuggestedFull timeFor contractorsLocal area$80k - $120k
...Description SAIC is seeking a highly skilled System Administrator to support the Naval Information Warfare Center Atlantic (NIWC LANT) Cloud Computing Innovation, Transformation, and Integration (CLOUD CITI) Division. The position will involve supporting both physical...Suggested$85k - $95k
...Overview Systems Administrator (C80-2026-25926): Bowhead seeks a Systems Administrator to join our team at Naval Surface Warfare Center located at Joint Expeditionary Base Little Creek-Fort Story. Responsibilities Support the IT team by responding to users'...Full timeContract workTemporary workPart timeFor contractorsWork experience placement- ...Overview DecisionPoint Corporation is seeking a Systems Administrator to support the Norfolk Naval Shipyard (NNSY) IT Support Services contract. NNSY's mission is to safely return warships to the Fleet on time and within budget. The Systems Administrator will support...Contract workFor contractorsLocal area
$60k - $65k
...Veteran Owned Small Business with over 20 years’ Cybersecurity and Government Contracting experience. Watershed is looking for a Systems Administrator to Install, configure, and support an organization's local area network (LAN), wide area network (WAN), and Internet systems...Contract workLocal areaMonday to Friday- ...be considered on a case-by-case basis.) Essential Functions and Responsibilities: Provide Network and Computer Systems Administration support to include installation, configuration, troubleshooting, upgrading, maintaining, and replacing or removing hardware...For contractorsWork experience placementLocal areaImmediate startRelocationFlexible hours
- ...Navy support. ICI Services—a 100% employee-owned company proudly celebrating 26 years ofexcellence—is seeking Cybersecurity Systems Administrator IV to support Surface Combat Systems Training Command (SCSTC) -NSWC Dahlgren Division Team in San Diego, CA.At ICI Services,...Civilian ContractorFor contractors
- ...Job Description Job Description Predicate Logic is looking for a motivated System Administrator III to join our team in Norfolk, VA.Founded in 1992, Predicate Logic is a woman-owned, employee-owned, high technology engineering service company. Predicate Logic's employees...Local area
$50 - $65 per hour
...Description Position Overview Our client is seeking an experienced Business Systems Analyst / Systems Administrator with strong Lacernex platform expertise to support and lead Phase 2 of a major enterprise rollout initiative. This individual will join a small,...Contract workTemporary workRemote work- ...Engineer to support our TACNET program onsite in San Diego, CA Or Norfolk, VA. This role requires up to 25% travel.JOB DUTIES:Provide system life cycle systems engineering support for our NAVWAR and NIWC customers. Focused primarily on ACS but will include software and...Remote work
- The Sr. Systems Administrator is at the forefront of deploying and supporting new technologies at HRT. In support of the strategic initiatives following the established project plan under the direction of the Director of Technology Services, implement and support datacenter...Seasonal workWork at officeLocal areaRemote work
- ...growth, balance, and belonging where every team member can thrive. Due to continued growth, we are currently seeking to add a Systems Administrator to our team! In this role, you will provide crucial support to our clients, serving as both field and escalation support,...Work at office
- Tyto Athene is searching for a mid-level System Administrator to work with physical security professionals to manage and maintain the next evolution of physical security access control systems. Responsibilities: Works with Windows Server 2019/2022 and Windows 10/11 Manages...Full time
- ...environment. Essential Job Functions Involved in all phases of test system design, including requirements generation, hardware design,... ...10+ years of IT experience, including 5 years of system administration supporting Windows in a network environment. Licenses or Certificates...Remote workFlexible hours
- Entrust Government Solutions has an immediate career opportunity for a Systems Administrator to join our Norfolk team. The successful candidate will work under minimal direction providing system administration and Information Technology Service Management (ITSM) to support...Work at officeImmediate start
- ...Responsibilities 5-7 years’ of experience with Windows server administration or AIX/Linux administration. Experience with Apache web... ...environment. Ensures optimization and tuning of server, file systems, capacity planning and appropriate replication. Ability to troubleshoot...Contract workLocal areaImmediate start
$86.8k - $198k
...insight into their Linux environments through automated monitoring, system hardening, configuration management, and performance... ...of start dateNice If You Have: Experience with VMware vSphere administration and managing virtual machineExperience in Kubernetes, container...Full timeContract workPart timeWork at officeLocal areaImmediate startRemote work$101k - $105k
...SharePoint Systems Administrator - Top Secret Join our dynamic IT team as a SharePoint Systems Administrator where you'll play a critical role in managing and optimizing our enterprise SharePoint infrastructure. This position requires an active Top-Secret clearance...Full time- The Project Systems Engineer leverages a strong foundation in systems engineering to guide the division’s engineering and design activities under the supervision of the Design Engineering Manager. This role requires effective collaboration with Oceaneering personnel and...
$69.1k - $141.5k
Job Title: Systems EngineerJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: SecretEmployee... ...Business IT supply, logistics, maintenance, and/or personnel administration system for aviation, afloat, or shore activities.• Education:...Contract workWork experience placementLocal areaWorldwideFlexible hours$134.1k - $241.4k
...Description: Parsons is looking for an amazingly talented Lead Systems Engineering Architect to join our team in Norfolk, VA! In... ...concisely for both technical and non-technical audiences Deep administrative knowledge of Red Hat Enterprise Linux (RHEL), Ubuntu, and Windows...Full timeLocal area$75.2k - $158.1k
Job Title: Network Administrator - Level 2Job Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/... ...Standard Operating Procedures (SOP) for network operations.Resolve systems failures and accessibility problems within the network to our...Contract workWork experience placementImmediate startRemote workFlexible hours$87k - $131k
...configuring, and hardening EC2 instances and administering the Linux systems that run our re-hosted applications. You will work closely... ...— security groups, elastic IPs, placement groups Linux Administration · Strong hands-on Linux system administration experience (RHEL...Full timeTemporary workPart timeWork at officeLocal areaRemote workFlexible hoursShift work$61.9k - $141k
Digital Systems EngineerThe Opportunity: Are you looking for an opportunity to combine your technical skills with big picture thinking to make an impact in National Security? You understand your customer’s environment and how to develop the right systems for their mission...Full timeContract workPart timeWork at officeLocal areaRemote work$82.1k - $172.4k
Job Title: PowerBuilder Developer/Systems EngineerJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required... ...supporting Navy supply chain, logistics, and personnel administration.Responsibilities:Systems Engineering & Requirements Validation...Contract workWork experience placementLocal areaFlexible hours- ...Description ThisWay Global is looking for a Distributed Systems Engineer in a remote role within the United States. ThisWay Global, Inc. is an AI-first technology company headquartered in Texas, operating at the intersection of artificial intelligence, data center infrastructure...Full timeRemote work
$86.8k - $198k
Undersea Warfare Wargame Adjudicator The Opportunity: As an expert in defense missions, your unique background inspires you to think bigger, push further, and ask questions others don’t. We need your extensive industry knowledge and advisory skills to solve some of our...Full timePart timeLocal area
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