Defense Contractor/ National Defense security professional jobs

Oct 05, 2026

Full time

Armed Security Flex Professional - Shipyard - San Diego

$26.00 hourly

Allied Universal San Diego San Diego, CA

Company Overview: Allied Universal®, North America’s leading security and facility services company, offers rewarding careers that provide you a sense of purpose. While working in a dynamic, welcoming, and collaborative workplace, you will be part of a team that contributes to a culture that positively impacts the communities and customers we serve. MUST HAVE EXPOSED FIREARM PERMIT Armed Security Flex Professional needed for Downtown location! Must have active CA guard card! Pay Rate $26/hour Now offering weekly and daily pay! Allied Universal® is hiring a Armed Security Professional Branch Flex Officer.The Armed Security Professional Branch Flex Officer will serve and safeguard clients in a range of industries such as Healthcare, Education, Finance and more. Join a leading team where flexibility meets opportunity. As an Armed Security Professional Branch Flex Officer, you’ll use our exclusive shift-pickup platform to view and claim open shifts...

Nov 03, 2026

Full time

Program Security Representative (PSR) III - Palmdale, CA

$137,870 - $186,530 yearly

General Dynamics Information Technology Palmdale, CA

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Security Operations Job Description: The Program Security Representative’s primary function is to provide multi-discipline security support for one or more of the customer’s Special Access Programs (SAPs). The position will provide “day-to-day” multi-discipline analysis for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities. Performance shall include: Ensure strict adherence to the provisions of the NISPOM, its Supplement, the DoD Overprint, DCID, ICD, and SAP policy. Assist in developing and executing approved policies and procedures for safeguarding Special Access. Program (SAP), Sensitive Compartmented Information (SCI) and collateral data in support of US military operations. Provide day-to-day...

Oct 29, 2026

Full time

K-9 Junior Handler - San Diego

$25.00 - $27.00 hourly

Triple Canopy San Diego, CA

POSITION SUMMARY The Junior Handler will be responsible for screening cargo in compliance with TSA rules and regulations. The Junior Handler will be required to complete a 4–8-weeks minimum team training course and certification prior to mobilization to the assigned location.  PAY TRANSPARANCY/COMPENSATION Pay rate is compensated at $25-27 per hour Virtual rate is compensated at twenty dollars per hour Moyock rate is compensated at fifteen dollars per hour RESPONSIBILITIES Participate in CCSP related training to search cargo and identify explosive threats  Conduct authorized representative duties related to X-Ray, physical search, and explosive trace detection as needed  Perform Junior Handler duties while commanding a trained explosive working dog  ...

Oct 29, 2026

Full time

Unarmed Security Officer San Francisco

$40.00 hourly

Triple Canopy San Francisco, CA

This position is up and coming for a new contract. We are currently collecting applicants for interviews to be held in August. POSITION SUMMARY Provide professional, high-level unarmed security services for the personnel, visitors, and property of various buildings within the California Bay Area. Work locations include Mission Bay, South San Francisco, San Carlos, and Palo Alto. shifts in a specific building will not be guaranteed. PAY TRANSPARENCY/COMPENSATION Rate of Pay: $40.00/hr Paid training for 1.5 weeks at a full hourly rate RESPONSIBILITIES Provide security for various buildings by conducting perimeter security, internal security, threat monitoring , etc. Protect personnel and property in a professional manner Meet and deal tactfully and politely with general public and visitors Effectively and efficiently screen and process visitors as required Identify, report, delay or detain persons who violate...

Oct 29, 2026

Full time

Unarmed Security Guard San Diego

$30.00 hourly

Triple Canopy San Diego, CA

We are currently collecting resumes for an upcoming new contract. We anticipate holding interviews in the first quarter of 2026, but the timeline is subject to change. POSITION SUMMARY Provide professional, high-level unarmed security services for the personnel, visitors, and property of various buildings within the California Bay Area. Work locations include Mission Bay, South San Francisco, San Carlos, and Palo Alto. shifts in a specific building will not be guaranteed. PAY TRANSPARENCY/COMPENSATION Rate of Pay: $30.00/hr Paid training for at a full hourly rate RESPONSIBILITIES Provide security for various buildings by conducting perimeter security, internal security, threat monitoring, etc. Protect personnel and property in a professional manner Meet and deal tactfully and politely with the general public and visitors Effectively and efficiently screen and process visitors as required Identify, report,...

Oct 19, 2026

Full time

Security Officer 3 Hawthorne, Vandenburg and Palo Alto

$28.00 hourly

Space X Lompoc, CA

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SECURITY OFFICER 3 Security Officers are dedicated security professionals with a demonstrated ability to work independently and as a member of a team in a fast-paced high-tech environment. Security Officers work as a team, patrolling the company’s properties via vehicle and foot and/or ensuring security at a series of fixed locations in accordance with federal, state, and local laws as well as company regulations. RESPONSIBILITIES: Maintain proficiency/awareness of static guard post duties Plan and execute security support for SpaceX operations Plan and conduct advanced security training for all security officers Conduct advanced research and analysis...

Oct 08, 2026

Full time

Cybersecurity Systems Engineer- San Diego

$115,000 - $135,000 yearly

Highbury Defense Group HDG Hybrid (San Diego, CA)

Cybersecurity Systems Engineer | San Diego, CA Applying to this job will open a new window on the employer's web site to apply there. Posted Date 9/19/2026 Description Lyntris is a defense technology company that connects sensing to action across the connected battlespace. Lyntris brings together the talents of Accelint and Vitesse teams under one mission, with each contributing deep expertise within their domain. Combining differentiated hardware, software and mission expertise, Lyntris helps customers sense threats, make sense of complex conditions and act with greater speed, precision and confidence in contested environments. Lyntris supports U.S. and allied defense organizations across every branch — including Navy, Army, Air Force, Space Force and allied partners — spanning strategic, operational and tactical missions and every domain: Space, Air, Land, Sea and Cyber. With more than 200 active defense programs, Lyntris works...

Oct 06, 2026

Full time

Program Security Representative (PSR) II

$104,040 - $140,760 yearly

General Dynamics Information Technology Palmdale, CA

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Security Operations Job Description: The Program Security Representative’s primary function is to provide multi-discipline security support for one or more of the customer’s Special Access Programs (SAPs). The position will provide “day-to-day” multi-discipline analysis for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities. Performance shall include: Ensure strict adherence to the provisions of the NISPOM, its Supplement, the DoW Overprint, DCID, ICD, and SAP policy Assist in developing and executing approved policies and procedures for safeguarding Special Access Program (SAP), Sensitive Compartmented Information (SCI) and collateral data in support of US military operations Provide day-to-day...

Oct 05, 2026

Full time

Security Shipyard Flex Officer - San Diego

$22.85 hourly

Allied Universal San Diego San Diego, CA

Company Overview: Allied Universal®, North America’s leading security and facility services company, offers rewarding careers that provide you a sense of purpose. While working in a dynamic, welcoming, and collaborative workplace, you will be part of a team that contributes to a culture that positively impacts the communities and customers we serve. Security Flex Officer needed for Downtown location! Must have active CA guard card! Schedule: open avilaibility Pay Rate $22.85/hour Great perks and benefits Allied Universal® is hiring a Security Professional Branch Flex Officer. The Security Professional Branch Flex Officer will serve and safeguard clients in a range of industries such as Healthcare, Education, Finance and more. Join a leading team where flexibility meets opportunity. As a Security Professional Branch Flex Officer, you’ll use our exclusive shift-pickup platform to view and claim open shifts based on your availability - giving...

Oct 19, 2026

Full time

Security Officer 3 - Night Shift Vandeberg

$28.00 hourly

Space X Vandenberg Space Force Base, CA

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SECURITY OFFICER 3 Security Officers are dedicated security professionals with a demonstrated ability to work independently and as a member of a team in a fast-paced high-tech environment. Security Officers work as a team, patrolling the company’s properties via vehicle and foot and/or ensuring security at a series of fixed locations in accordance with federal, state, and local laws as well as company regulations. RESPONSIBILITIES: Maintain proficiency/awareness of static guard post duties Plan and execute security support for SpaceX operations Plan and conduct advanced security training for all security officers Conduct advanced research and analysis in support of SpaceX...

Nov 04, 2026

Full time

Systems Engineer III – SIGINT San Diego

$112,000 - $165,000 yearly

Epsilon Systems San Diego, CA

Epsilon C5I, Inc. ( is seeking a Systems Engineer III with at least 4-8 years’ experience for work in San Diego, CA. If you have a passion for excellence in engineering and enjoy working on challenging projects in a fast-paced, team-oriented environment – read on! Summary: Develops system requirement specifications for mechanical, structural or electrical/electronic design by analyzing user's requirements, concept of operations documents and high-level system architectures. Duties and Responsibilities: Develops technical documentation. Develops system Architecture and system design documentation. Incorporates new plans, designs and systems into ongoing operations. Contributes to the technical direction for the development, engineering, interfacing, integration and testing of all components of complex hardware/software systems to include network analysis, functional allocation, systems requirements reviews, interface standards and system architectures....

Nov 04, 2026

Full time

Cyber Security Engineer III - SIGINT - San Diego

$135,000 - $170,000 yearly

Epsilon Systems San Diego, CA

Epsilon C5I ( focused on software development and systems engineering for complex command, control, intelligence and combat systems, is seeking a Cyber Security Engineer III with 4-8 years of experience for work in San Diego, CA. Our engineering efforts provide the warfighter with tools to support critical support to operational missions to improve targeting capabilities. If you have a passion for excellence in engineering and enjoy working on challenging projects in a fast-paced, team-oriented environment – read on! Summary: The Cybersecurity Engineer shall be responsible for leading multiple efforts for system configurations maintaining authority to operate. The Cybersecurity Engineer conducts information system security engineering activities, such as capturing and tracking evolving information security requirements and ensuring the system maintains a strong security posture through purposeful design and configuration. Duties and...

Nov 04, 2026

Full time

Senior Systems Engineer I – SIGINT San Diego

$145,000 - $185,000 yearly

Epsilon Systems San Diego, CA

Epsilon C5I, Inc. ( is seeking a Senior Systems Engineer I with 6+ years of experience for work in San Diego, CA. If you have a passion for excellence in engineering and enjoy working on challenging projects in a fast-paced, team-oriented environment – read on! Summary: Develops system requirement specifications for mechanical, structural or electrical/electronic design by analyzing user's requirements, concept of operations documents and high-level system architectures. Duties and Responsibilities: Develops technical documentation. Develops system Architecture and system design documentation. Incorporates new plans, designs and systems into ongoing operations. Contributes to the technical direction for the development, engineering, interfacing, integration and testing of all components of complex hardware/software systems to include network analysis, functional allocation, systems requirements reviews, interface standards and system architectures. Contributes...

Nov 04, 2026

Full time

Senior Cyber Security Engineer I - SIGINT - San Diego

$165,000 - $185,000 yearly

Epsilon Systems San Diego, CA

Epsilon C5I ( focused on software development and systems engineering for complex command, control, intelligence and combat systems, is seeking a Senior Cyber Security Engineer I with a minimum of 6 years’ experience for work in San Diego, CA. Our engineering efforts provide the warfighter with tools to support critical support to operational missions to improve targeting capabilities. If you have a passion for excellence in engineering and enjoy working on challenging projects in a fast-paced, team-oriented environment – read on! Summary: The Cybersecurity Engineer shall be responsible for leading multiple efforts for system configurations maintaining authority to operate. The Cybersecurity Engineer conducts information system security engineering activities, such as capturing and tracking evolving information security requirements and ensuring the system maintains a strong security posture through purposeful design and configuration. Duties and...

Nov 03, 2026

Full time

Instructional Developer - Port Hueneme, CA

$70,658 - $86,250 yearly

General Dynamics Information Technology Port Hueneme, CA

Type of Requisition: Regular Clearance Level Must Currently Possess: None Clearance Level Must Be Able to Obtain: None Public Trust/Other Required: NACLC (T3) Job Family: Program Instruction Support Job Description: Instructional Developer Transform technology into opportunity as an Instructional Developer with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate. At GDIT, people are our differentiator. As an Instructional Developer you will help ensure today is safe and tomorrow is smarter. Our work depends on Instructional Developer joining our team to coordinate and manage the development and maintenance of curricula. HOW AN INSTRUCTIONAL DEVELOPER WILL MAKE AN IMPACT ● Designs and develops instructional approaches and interactive courseware to meeting training requirements ● Design and develop...

Nov 03, 2026

Full time

Special And Tactical Operations Leader, WARFARE ANALYST F/A-18A-F

$122,275 - $165,431 yearly

General Dynamics Information Technology Fresno, CA

Type of Requisition: Pipeline Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret Public Trust/Other Required: None Job Family: Intelligence Operations and Analysis Job Description: SPECIAL AND TACTICAL OPERATIONS LEADER, WARFARE ANALYST F/A-18A-F Contribute to the strategic direction of the business and support impactful mission outcomes as a Special and Tactical Operations Leader - Aviation at GDIT. Here, you’ll enable the success of the most critical government missions and the growth of a meaningful career in Administration. MEANINGFUL WORK AND PERSONAL IMPACT As a Special and Tactical Operations Leader - Aviation, the work you’ll do at GDIT will be impactful to the mission of the Naval Air Warfare Center Aircraft Division (NAWCAD) Digital Analytics Infrastructure and Technology Advancement (DAiTA) Group Warfare Effectiveness Department (WED). You will play a crucial role as a team leader,...

Nov 03, 2026

Full time

Special And Tactical Operations Leader, WARFARE ANALYST E-2D

$122,275 - $165,431 yearly

General Dynamics Information Technology Fresno, CA

Type of Requisition: Pipeline Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret Public Trust/Other Required: None Job Family: Intelligence Operations and Analysis Job Description: SPECIAL AND TACTICAL OPERATIONS LEADER, WARFARE ANALYST E-2D Contribute to the strategic direction of the business and support impactful mission outcomes as a Special and Tactical Operations Leader - Aviation at GDIT. Here, you’ll enable the success of the most critical government missions and the growth of a meaningful career in Administration. MEANINGFUL WORK AND PERSONAL IMPACT As a Special and Tactical Operations Leader - Aviation, the work you’ll do at GDIT will be impactful to the mission of the Naval Air Warfare Center Aircraft Division (NAWCAD) Digital Analytics Infrastructure and Technology Advancement (DAiTA) Group Warfare Effectiveness Department (WED). You will play a crucial role as a team leader, developing...

Nov 03, 2026

Full time

Construction Surveillance Technician (CST) I

$81,349 - $84,870 yearly

General Dynamics Information Technology Lompoc, CA

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Security Operations Job Description: Construction Surveillance Technician The Construction Surveillance Technician’s primary function is to provide day to day security in support of Sensitive Compartmented Information Facility (SCIF) & Special Access Program (SAP) construction efforts. Performance shall include: Assesses, identifies and communications recommendations for improvements of policies, procedures, or systems. Identifies threats, vulnerabilities, and potential risks. Drafts security incident reports and briefs government and civilian agencies including military senior leaders. Manages uniformed escort personnel and associated logs; assigns, trains, briefs site security duties and ensures timely reporting of security incidents to site...

Nov 03, 2026

Full time

IT Enterprise Operations Services Delivery Manager

$140,821 - $190,523 yearly

General Dynamics Information Technology Pasadena, CA

Type of Requisition: Pipeline Clearance Level Must Currently Possess: None Clearance Level Must Be Able to Obtain: None Public Trust/Other Required: NACI (T1) Job Family: IT Infrastructure and Operations Job Description: GDIT is seeking an IT Enterprise Operations Services Delivery Manager to support our NASA Business Area in driving the successful pursuit and execution of key initiatives across our growing NASA portfolio. GDIT is your place to make meaningful contributions to challenging projects and grow a rewarding career. The IT Enterprise Operations Services Delivery Manager will play a critical role in supporting and helping execute a comprehensive solution that integrates and manages a 24x7 Service Desk, advanced AI-enabled tools, efficient on-site deskside support, a PC-as-a-Service hardware model, and complementary engineering, cybersecurity, and IT Service Management (ITSM) development resources. As an IT Enterprise Operations Services...

Nov 03, 2026

Full time

Construction Surveillance Technician (CST) I

$81,349 - $84,870 yearly

General Dynamics Information Technology Lompoc, CA

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: Security Operations Job Description: Construction Surveillance Technician The Construction Surveillance Technician’s primary function is to provide day to day security in support of Sensitive Compartmented Information Facility (SCIF) & Special Access Program (SAP) construction efforts. Performance shall include: Assesses, identifies and communications recommendations for improvements of policies, procedures, or systems. Identifies threats, vulnerabilities, and potential risks. Drafts security incident reports and briefs government and civilian agencies including military senior leaders. Manages uniformed escort personnel and associated logs; assigns, trains, briefs site security duties and ensures timely reporting of security incidents to site...

401 security professional jobs found