281 - 300 of 648 Jobs

Windows Systems Administrator

Leidos

Arlington, Virginia, USA

Full-time

Description We are currently seeking a Windows Systems Administrator to join the Compartmented Enterprise Services Office (CESO) effort. This program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population. Apply today to become part of the Leidos team that is assisting CESO as they migrate to a high security cloud environment by providing network and communication services,

F-35 Network Engineer | Active Secret clearance

General Dynamics

Arlington, Virginia, USA

Full-time

Type of Requisition: Regular Clearance Level Must Currently Possess: Secret Clearance Level Must Be Able to Obtain: Secret Public Trust/Other Required: None Job Family: Network Engineering Job Qualifications: Skills: Cisco Technologies, LAN WAN, Microsoft Azure, Network Engineering Certifications: None Experience: 5 + years of related experience ship Required: Yes Job Description: Transform technology into opportunity as a Senior Network Engineer with GDIT. A career in enterprise IT mean

Information Systems Analyst / Secret / King of Prussia, PA

Lockheed Martin Corporation

King of Prussia, Pennsylvania, USA

Full-time

Job Description This position requires an active Secret clearance. Lockheed Martin Space Information Systems Analyst position will support military Space Programs. This position receives day-to-day operations guidance from program staff and will report to the FBM IS Classified IT Ops Manager. Responsibilities include: Perform successful root cause analysis for problem resolution in Windows and Linux environments Analyzing and assessing server performance, storage capacity and planning for fut

Information Systems Security Manager

Textron, Inc.

Slidell, Louisiana, USA

Full-time

About This Role Provide information systems security support from a managerial and technical standpoint for DoD and Non-DoD classified systems and networks. Standing up and maintaining accreditations for classified systems and networks. Classified Systems & Networks range in complexity and size to include multi-platform computing (Linux, Windows, Solaris, VMWare), virtual environments, and mobile systems. Extensive experience with eMASS, JSIG DCSA DAAPM, DISA STIGs. Assemble and maintain securit

Senior Software Engineer Architect

SAIC

San Diego, California, USA

Full-time

Job ID: 2508371 Location: SAN DIEGO, CA, US Date Posted: 2025-08-06 Category: Engineering and Sciences Subcategory: Systems Engineer Schedule: Full-time Shift: Day Job Travel: Yes, 10 % of the Time Minimum Clearance Required: TS/SCI Clearance Level Must Be Able to Obtain: None Potential for Remote Work: No Description SAIC is seeking a TS/SCI cleared Senior Software Engineer / Architect in San Diego, CA that will be responsible for providing high quality software engineering advisory

System Administrator

General Dynamics

Eielson Air Force Base, Alaska, USA

Full-time

Type of Requisition: Regular Clearance Level Must Currently Possess: Secret Clearance Level Must Be Able to Obtain: Secret Public Trust/Other Required: None Job Family: Systems Administration Job Qualifications: Skills: Computer Backups, IT Policies, System Security Certifications: None Experience: 1 + years of related experience ship Required: Yes Job Description: Systems Administrator Transform technology into opportunity as a Systems Administrator with GDIT. A career in enterprise IT

System Administrator

General Dynamics

Hawaii, USA

Full-time

Type of Requisition: Regular Clearance Level Must Currently Possess: Secret Clearance Level Must Be Able to Obtain: Secret Public Trust/Other Required: None Job Family: Systems Administration Job Qualifications: Skills: Computer Backups, IT Policies, System Security Certifications: None Experience: 1 + years of related experience ship Required: Yes Job Description: Systems Administrator Transform technology into opportunity as a Systems Administrator with GDIT. A career in enterprise IT

Linux Systems Administrator

SAIC

Aberdeen, Maryland, USA

Full-time

Job ID: 2507120 Location: ABERDEEN, MD, US Date Posted: 2025-06-30 Category: Information Technology Subcategory: Sys Administrator Schedule: Full-time Shift: Day Job Travel: No Minimum Clearance Required: Top Secret Clearance Level Must Be Able to Obtain: None Potential for Remote Work: No Description SAIC is seeking a proven Linux Systems Administrator to join the Army Research Laboratory (ARL) Information Technology (IT) Modernization program and support the full range of Enterprise

Systems Engineer- Mbr Eng Staff

Lockheed Martin Corporation

Moorestown, New Jersey, USA

Full-time

Job Description WHAT WE'RE DOING At Lockheed Martin, we are passionate about innovation and integrity. We believe that by applying the highest standards of business ethics and forward-thinking, everything is within our capacity - and yours as a Lockheed Martin employee. Lockheed Martin values your skills, training, education, and background. We are seeking a highly skilled and motivated System Administrator to join our Mobile Team. As a System Administrator, you will be responsible for providi

Principal Embedded Software Engineer (Onsite)

RTX Corporation

Richardson, Texas, USA

Full-time

Date Posted: 2025-07-21 Country: United States of America Location: HTX36: Richardson, TX 3200 E Renner Rd , Richardson, TX, 75082-2402 USA Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date.Security Clearance: DoD Clearance: Secret Are you looking to make a meaningful, positive impact while advancing your career? Here at Collins Aerospace, we're enhancing m

Architecture Engineer (NE II) (Government)

AT&T Inc.

Chantilly, Virginia, USA

Full-time

Job Description: This position requires office presence a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered. AT&T Global Public Sector is a trusted provider of secure, IP enabled, cloud-based, network solutions and professional services to the Federal Government. We are dedicated to recruiting, developing and empowering a diverse, high-performing workforce that is passionate about what they do, committed to our shared values and dedicated to our

Information System Security Officer (ISSO) (Government)

AT&T Inc.

Reston, Virginia, USA

Full-time

Job Description: This position requires office presence of a minimum of 5 days per week and is only located at customer's site. No relocation is offered. AT&T Global Public Sector is a trusted provider of secure, IP enabled, cloud-based, network solutions and professional services to the Federal Government. We are dedicated to recruiting, developing, and empowering a diverse, high-performing workforce that is passionate about what they do, committed to our shared values, and dedicated to our c

Principal Systems Engineer II (Unix/Linux)

Electronic Consulting Services, Inc (ECS Federal)

Clarksburg, West Virginia, USA

Full-time

Job Description ECS is seeking a Principal Systems Engineer II (Unix/Linux) to work in our Pocatello, ID office. As a Principal Systems Engineer II (Unix/Linux), you will be responsible for the design, deployment, testing, certification, patching, and addressing interoperability issues of the base operating system and all support libraries, components, and application dependencies. Position requirements and duties of the Principal Systems Engineer II (Unix/Linux) : S erve as the advanced know

Classified Network Administrator

RTX Corporation

Cambridge, Massachusetts, USA

Full-time

Date Posted: 2025-08-01 Country: United States of America Location: MA105: BBN Headquarters 10 Moulton Street , Cambridge, MA, 02138 USA Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable U.S. government issued security clearance is required prior to start date.Security Clearance: DoD Clearance: Secret This position requires active and transferable Secret U.S. government security clearance RTX Corporation is an Aerospace and Defe

Information System Security Officer (ISSO)

General Dynamics

Fort Belvoir, Virginia, USA

Full-time

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret Public Trust/Other Required: None Job Family: Information Systems Management Job Qualifications: Skills: Cybersecurity, Information System Security, NIST SP 800, Plan of Action and Milestones (POA&M), Security Evaluations Certifications: None Experience: 5 + years of related experience ship Required: Yes Job Description: Information Systems Security Officer (

Cyber Security Engineer (SME)

Leidos

Bethesda, Maryland, USA

Full-time

Leidos has a new and exciting opportunity for Cyber Security Engineer SME in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vest

Systems Administrator

SAIC

Andover, Massachusetts, USA

Full-time

Job ID: 2507140 Location: ANDOVER, MA, US Date Posted: 2025-06-30 Category: Information Technology Subcategory: Sys Administrator Schedule: Full-time Shift: Day Job Travel: No Minimum Clearance Required: TS/SCI Clearance Level Must Be Able to Obtain: None Potential for Remote Work: No Description SAIC currently has a career opportunity for a Cyber Systems Administrator (SA) in our Andover, Massachusetts facility to support the US Space Force (USSF). Job Duties: Manage and maintain cur

Information System Security Officer

Lockheed Martin Corporation

King of Prussia, Pennsylvania, USA

Full-time

Job Description At Lockheed Martin Rotary and Mission System (RMS), we are driven by innovation and integrity. We believe that by applying the highest standards of business ethics and visionary thinking, everything is within our reach - and yours as a Lockheed Martin employee. Lockheed Martin values your skills, training, and education. Come and experience your future! This position requires the candidate primarily function as the Information System Security Officer (ISSO) for multiple program

Lead System Security Engineer

Parsons Services Company

Boulder, Colorado, USA

Full-time

In a world of possibilities, pursue one with endless opportunities. Imagine Next! When it comes to what you want in your career, if you can imagine it, you can do it at Parsons. Imagine a career working with exceptional people sharing a common quest. Imagine a workplace where you can be yourself. Where you can thrive. Where you can find your next, right now. We've got what you're looking for. Job Description: Parsons is looking for an amazingly talented Lead System Security Engineer to join o

DevSecOps Engineer Staff

Lockheed Martin Corporation

Colorado Springs, Colorado, USA

Full-time

Job Description What We're Doing Our team, the Command and Control, Battle Management and Communications (C2BMC) team at Lockheed Martin, is dedicated to engineering, developing, and integrating new capabilities for the Missile Defense System that protects the United States and its allies. While we are part of a large organization, we operate within smaller, agile teams in a fast-paced, dynamic environment. Our responsibilities include Sensor/Weapon Integration, Algorithm Development, User Int