Defense Contractor/ National Defense customer service jobs in Costa Mesa, CA

Sep 21, 2026

Full time

$121.00 - $259.00 hourly

L3Harris Anaheim, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Manager, Quality Management Job Code: 43675 Job Location: Anaheim, CA. Job Schedule: 9/80 Employees work 9 out of every 14 days – totaling 80 hours worked, and have every other Friday off Job Description:...

Sep 11, 2026

Full time

Supervisor, Security Protective Operations Center

$105,000 - $130,000 yearly

Space Exploration Technologies Corp Hawthorne, 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. SUPERVISOR, SECURITY PROTECTIVE OPERATIONS CENTER Effectively oversee the daily management of the Hawthorne SPOC team to keep facilities and employees safe, secure, and operational. In the absence of the Security Manager, handle administrative duties and attend meetings as needed. Facilitate the duties of SPOC Operators and ensure SPOC standards & requirements are being met. Work with internal stakeholders and external vendors ensure all requests and duties are fulfilled. RESPONSIBILITIES: Reporting to the SPOC Manager, this position requires a high degree of diplomacy, flexibility, and adaptability At the direction of the SPOC Manager, oversee security...

Sep 05, 2026

Full time

Administrative Assistant El Segundo

$44,800 - $55,900 yearly

KBR El Segundo, CA

The MILSATCOM Systems Engineering, Integration, and Test (MSEIT) effort provides leading edge Systems Engineering & Integration (SE&I) for the Air Force’s Space and Missiles System Center. We support the Air Force’s acquisition of state-of-the-art Military Satellite Communications systems, providing global secure, survivable, and protected communications for our nation’s warfighters. We seek technical individuals who will thrive in a highly collaborative work environment of small teams, using the most modern tools and methodologies to tackle the challenges of integrating complex space and ground communications systems. Why Join Us? Innovative Projects: KBR’s work is at the forefront of engineering, logistics, operations, science, program management, mission IT and cybersecurity solutions. Collaborative Environment: Be part of a dynamic team that thrives on collaboration and innovation, fostering a...

Sep 05, 2026

Full time

Cyber Security Engineer El Segundo

$150,000 - $185,000 yearly

KBR El Segundo, CA

Title: Cyber Security Engineer Belong. Connect. Grow. with KBR! KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and national security communities. In this position, your work will have a profound impact on the country’s most critical role – protecting our national security. KBR is seeking a Cyber Security Engineer to join our team in El Segundo, CA. An active TS/SCI is required to be considered for this position. Why Join Us? Innovative Projects: KBR’s work is at the forefront of engineering, logistics, operations, science, program management, mission IT and cybersecurity solutions. Collaborative Environment: Be part of a dynamic team that thrives on collaboration and innovation, fostering a supportive and intellectually stimulating workplace. Impactful Work: Your contributions will be pivotal in designing and...

Sep 26, 2026

Full time

TDL Hardware Manager - FPGA and Digital Systems

$153.00 - $284.00 hourly

L3Harris Carlsbad, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Hardware Manager - Digital Systems Job Code: EEM6 Job Location: Carlsbad, California Job Schedule: 9/80: Employees work 9 out of every 14 days- totaling 80 hours worked- and have every other Friday off Job...

Sep 26, 2026

Full time

Director, Telemetry and Radio Frequency

$175,000 - $325,000 yearly

L3Harris Carlsbad, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Director, Telemetry and Radio Frequency Job Code: EMM7 Job Location: San Diego, CA Job Schedule: 9/80- employees work 9 out of 14 days- totaling 80 hours worked- and have every other Friday off Job Description:...

Sep 21, 2026

Full time

Senior Manager, Electrical Engrg

$127,500 - $236,500 yearly

L3Harris Carlsbad, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Manager, Electrical Engineering – Level 6 Job Code: 43927 Job Location: San Diego, CA Schedule: 9/80: Employees work 9 out of every 14 days- totaling 80 hours worked- and have every other Friday off Job Description: We...

Sep 26, 2026

Full time

Lead Subcontracts 1

$18.00 hourly

L3Harris Anaheim, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Subcontracts, Lead Job Location: Camden NJ or Herndon, VA or Norfolk, VA or Anaheim, CA or Melbourne, FL Schedule: 9/80 L3Harris is dedicated to recruiting and developing diverse, high-performing talent who are passionate about what...

Sep 21, 2026

Full time

Assembly D

$57,000 - $106,000 yearly

L3Harris Anaheim, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Assembly D Job Code : 42233 Job Location: Anaheim, CA Schedule: 9/80R Job Description: Reporting to the Supervisor, Manufacturing, the Assembly D is responsible for performing complex electro-mechanical assembly, rework, and...

Sep 21, 2026

Full time

Senior Specialist, Systems Engineer - Military GPS Receivers

$106.50 hourly

L3Harris Yorba Linda, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Senior Specialist, Systems Engineer - Military GPS Receivers Job Code: 43789 Job Location: Yorba Linda, CA Schedule: 4/10: Employees work 10 hour days, 4 days a week Job Description: The Senior Specialist Systems...

Sep 21, 2026

Full time

Integration & Test Engineering Manager

$122,000 - $227,000 yearly

L3Harris Yorba Linda, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Integration, Verification & Test Engineering Manager Job Code: 44291 Job Location: Yorba Linda, CA Schedule: 4 / 10: Employees work 10 hour days, 4 days a week Job Description: The Integration & Test...

Sep 21, 2026

Full time

Sr Specialist, Systems Engineering, Integration & Test Engineer - Field Testing Lead

$102,000 - $189,000 yearly

L3Harris Yorba Linda, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Sr Spec, Systems Engrg – Field Testing Lead Job Code: 42407 Job Location: Yorba Linda, CA Job Schedule: 4/10: Employees work 10 hour days, 4 days a week with every Friday off Job Description:...

Aug 24, 2026

Full time

Lead Systems Engineer

$127,500 - $236,500 yearly

L3Harris Yorba Linda, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Contributes to publishing change notices to system specification and update of requirements databases, architectural models, interface definitions, and trace system and Element level requirements. Document analysis results in reports and briefings for...

Aug 24, 2026

Full time

Engineering Manager - Military GPS & Position, Navigation, and Timing (PNT)

$127,500 - $236,500 yearly

L3Harris Yorba Linda, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Contributes to publishing change notices to system specification and update of requirements databases, architectural models, interface definitions, and trace system and Element level requirements. Document analysis results in reports and briefings for...

Aug 24, 2026

Full time

Scientist, Electrical Engineer-Hardware/RF/GPS/PNT

$153,000 - $284,000 yearly

L3Harris Yorba Linda, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Scientist, Electrical Engineer- Hardware/RF/GPS/PNT Job Number: 42107 Job Location: Yorba Linda, California, On Site Job Schedule: 4/10 Clearance: Must Have Active Secret Clearance to Be Considered Job Description:...

Aug 24, 2026

Full time

Manager, Systems Engineering

L3Harris Yorba Linda, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Systems Engineering Manager Job Code: 42063 Job Location: Yorba Linda, CA Job Schedule: 4/10 (preferred): Employees work 10 hour days, 4 days a week 9/80: Employees work 9 out of every 14 days- totaling 80 hours worked-...

Aug 31, 2026

Temp to Perm

Paralegal - Litigation Support- Los Angeles

Leidos Hybrid (Los Angeles, CA)

Paralegal - Litigation Support Job #: R-00177698 Location: Los Angeles, California Category: SCA Paralegal Schedule (FT/PT): Full Time Travel Required: Yes, 10% of the time Shift: Day Remote Type: No Remote Clearance: Public Trust External Referral Program : Ineligible Sector: Digital Modernization Share: share to twitter share to facebook share to linkedin Apply Now Save Job The Litigation Support Team at Leidos currently supporting the U.S. Department of Justice (DOJ) in Los Angeles, CA has an opening for a Paralegal to work in a downtown Los Angeles, CA DOJ office performing Paralegal duties. This is an exciting opportunity to use your experience helping the U.S. Department of Justice achieve...

Aug 31, 2026

Full time

Paralegal Specialist – Trial Support- Los Angeles

Leidos Los Angeles, CA

Paralegal Specialist – Trial Support Job #: R-00154751 Location: Los Angeles, California Category: SCA Paralegal Schedule (FT/PT): Full Time Travel Required: No Shift: Day Remote Type: No Remote Clearance: Public Trust External Referral Program : Ineligible Sector: Digital Modernization Share: share to twitter share to facebook share to linkedin Apply Now Save Job The Litigation Support Team at Leidos currently supporting the U.S. Department of Justice (DOJ) in Los Angeles, CA has an opening for a Paralegal Specialist – Trial Support to work in a downtown Los Angeles, CA DOJ office performing litigation support duties via said role. This is an exciting opportunity to use your experience helping...

Aug 31, 2026

Full time

Occupational Safety Health Analyst- El Segundo

$73,450 - $132,775 yearly

Leidos Hybrid (El Segundo, CA)

Occupational Safety Health Analyst Job #: R-00179800-OTHLOC-2612 Location: El Segundo, California Category: Environmental Health And Safety Schedule (FT/PT): Full Time Travel Required: Yes, 50% of the time Shift: Day Remote Type: No Remote Clearance: Public Trust External Referral Program : Eligible Referral Bonus Amount: $1,000 Sector: Digital Modernization Share: share to twitter share to facebook share to linkedin Apply Now Save Job Looking for an opportunity to make an impact? At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainable....

Sep 26, 2026

Full time

Specialist, Electronic Warfare Systems Engineer

L3Harris Carlsbad, CA

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. Job Title: Specialist, Systems Engineer Job Code: 42920 Job Location: Salt Lake City- UT Job Schedule: 9/80- employees work 9 out of every 14 days- totaling 80 hours worked- and have every other Friday off Position Overview: The Electronic...

76 customer service jobs found in Costa Mesa, CA