Security Engineer Jobs in Washington

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Lead Security Engineer

Eliassen Group

•

Washington, District of Columbia, USA

Contract

Description: We are looking for a Lead Security Engineer to support a F500 client in the Washington, DC metro area. Location: Washington, DC Pay Rate: $55-$65/hr. W2 This is a contract-to-hire opportunity. Applicants must be willing and able to work on a W2 basis and convert to FTE following contract duration. For our W2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance. Responsibilities: Key Techni
Posted 22 days ago | Updated 3 hours ago

Trellix Endpoint Security Engineer

Leidos

•

Alexandria, Virginia, USA

Full-time

Leidos has a current job opportunity for an Endpoint Security Solutions (ESS) Engineer on the DISA GSM-O program in Alexandria, VA. An active Secret security clearance and solid experience in Trellix are required. This position provides support to the ESS Lead in operating and maintaining Trellix software and clients for organizations supported by the J6. Activities that this position performs include performing systems analysis, modifying / updating systems based on results of analysis, deploy
Posted 5 days ago | Updated 3 hours ago

Senior Network Security Engineer

Costar Group

•

Arlington, Virginia, USA

Full-time

Senior Network Security Engineer Job Description Overview CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives. We have been living and breathing the world of real estate info
Posted 6 days ago | Updated 3 hours ago

Tenable Security Engineer

Booz Allen Hamilton

•

Washington, District of Columbia, USA

Full-time

Job Number: R0221395 Tenable Security Engineer Key Role: Join the Security Operations Center (SOC) team as a Tenable Security Engineer. I mplement and optimize enterprise vulnerability management solutions using Tenable.sc, Nessus, and other components of the Tenable ecosystem. I ntegrate Tenable with other enterprise security platforms and ensure that the vulnerability management program supports continuous monitoring, compliance, and risk reduction objectives . D eploy, configure, and optimize
Posted 18 days ago | Updated 4 hours ago

Senior Systems Security Engineer

SAIC

•

Alexandria, Virginia, USA

Full-time

Job ID: 2507174 Location: ALEXANDRIA, VA, US Date Posted: 2025-07-01 Category: Engineering and Sciences Subcategory: Systems Engineer 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 is hiring a Senior Systems Security Engineer with an active TS/SCI clearance to participate in Independent Technical Risk Assessments (ITRA) and Program Protection Plan () reviews to
Posted 10 days ago | Updated 1 hour ago

Network Security engineer

DMV IT Consulting

•

Washington, District of Columbia, USA

Full-time

Hi Everyone, Please look into the requirement and share me relevant profiles to Role: Network Security engineer Location: DC Duties & Responsibilities:a. Ability to monitor and analyze data traffic patterns within the OCFO network infrastructure;b. Identify network problems and recommend improvements to ensure optimal performance;c. Ability to improve network quality regarding any degradation;d. Ability to enhance security and knowledge of the latest security threats, worms and malware and advi
Easy Apply
Posted 2 days ago

Information Systems Security Engineer (ISSE)

Leidos

•

Washington, District of Columbia, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 1 hour ago

Information Systems Security Engineer (ISSE)

Leidos

•

Temple Hills, Maryland, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 1 hour ago

Information Systems Security Engineer (ISSE)

Leidos

•

Riverdale Park, Maryland, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 14 hours ago

Information Systems Security Engineer (ISSE)

Leidos

•

Mount Rainier, Maryland, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 14 hours ago

Information Systems Security Engineer (ISSE)

Leidos

•

Oxon Hill, Maryland, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 1 hour ago

Information Systems Security Engineer (ISSE)

Leidos

•

Washington, District of Columbia, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 1 hour ago

Information Systems Security Engineer (ISSE)

Leidos

•

College Park, Maryland, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 1 hour ago

Information Systems Security Engineer (ISSE)

Leidos

•

Bladensburg, Maryland, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 1 hour ago

Information Systems Security Engineer (ISSE)

Leidos

•

Alexandria, Virginia, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 14 hours ago

Information Systems Security Engineer (ISSE)

Leidos

•

Annandale, Virginia, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 14 hours ago

AI Security Engineer

Motion Recruitment Partners, LLC

•

Washington, District of Columbia, USA

Full-time

Job Title: Security Engineer - AI Red Teaming & Threat Analytics Location: Washington, DC (Hybrid - 3 Days Onsite) Type: 6-Month Contract-to-Hire Clearance: Must be eligible for Public Trust Overview: Our client is seeking a Security Engineer with a strong background in AI security, red teaming, and adversarial testing. This role focuses on securing enterprise LLM platforms such as Copilot, Azure OpenAI, and AWS Bedrock by identifying vulnerabilities, mitigating misuse, and implementing robu
Easy Apply
Posted 28 days ago | Updated moments ago

Senior Application Security Engineer

Software Guidance & Assistance

•

Rockville, Maryland, USA

Contract

Software Guidance & Assistance, Inc., (SGA), is searching for a Senior Application Security Architect for a Contract assignment with one of our premier Regulatory clients in Rockville, MD. This role is hybrid (2 days/week Oniste). The Senior Application Security Architect is responsible for designing, implementing, and overseeing enterprise-wide application security architecture and standards. This role focuses on establishing security frameworks, conducting architecture reviews, developing
Posted 13 hours ago | Updated 1 hour ago

Offensive Security Engineer

Costar Group

•

Arlington, Virginia, USA

Full-time

Offensive Security Engineer Job Description Offensive Security Engineer Overview CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives. We have been living and breathing the w
Posted 7 days ago | Updated 3 hours ago

Information Systems Security Engineer (ISSE)

Leidos

•

Greenbelt, Maryland, USA

Full-time

Job DescriptionDescription We are actively seeking Information Systems Security Engineers (ISSE) with a minimum of five (5) years experience in the role of an ISSE. This opportunity is supporting the customer s Accreditation and Authorization (A&A) projects at the Group organizational level and is therefore supporting across various levels within the customer organization. CLEARANCE REQUIREMENT: Must be US Citizen or US Person (Green Card Holder) with the ability to obtain a level 4 Public Tru
Posted 2 days ago | Updated 1 hour ago