ClearanceJobs
  • Candidates
  • Employers
  • Hiring Companies
  • News & Career Advice
  • Login
  • Register now
Experience
City
State
Clearance
Posted Within
Employer Name
Country
Job Category
Job Type
Polygraph
Remote/Hybrid

Top Secret / SCI Clearance Jobs

Top Secret/SCI

Viewing 1 - 20 of 18,236

Top Secret / SCI Jobs requiring security clearance

Show:
Sort by:

2026 Associate Program Cost and Schedule Control Analyst

New
Northrop Grumman
Apply today! Be one of the first candidates to apply for maximum exposure.
Dulles, VA(On-Site/Office)
Posted today
TS/SCI
None

RELOCATION ASSISTANCE: No relocation assistance availableCLEARANCE REQUIRED FOR START: NoCLEARANCE TYPE: NoneTRAVEL: Yes, 10% of the TimeDescriptionAt Northrop Grumman, our employees have incredible o...

user avatar

Manager, Information Security Systems Engineering

New
L3Harris Technologies
Apply today! Be one of the first candidates to apply for maximum exposure.
Waco, TX(On-Site/Office)
Posted today
TS/SCI
Not Specified

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 fo...

user avatar

Senior Associate, Information Security Systems Engineering

New
L3Harris Technologies
Apply today! Be one of the first candidates to apply for maximum exposure.
Waco, TX(On-Site/Office)
Posted today
TS/SCI
Not Specified

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 fo...

user avatar

Web Developer - Hybrid

New
Bryn Neil
Apply today! Be one of the first candidates to apply for maximum exposure.
Colorado Springs, CO(Off-Site/Hybrid)
Posted today
5+ yrs exp
TS/SCI

Bryn Neil is a technology development company. We develop, adapt and scale technical capabilities across any domain faster than anyone else, protecting our mission partners and ensuring program succe...

user avatar

Sr. Software Engineer - CI Poly

New
Bryn Neil
Apply today! Be one of the first candidates to apply for maximum exposure.
Broomfield, CO(On-Site/Office)
Posted today
10+ yrs exp
TS/SCI
CI Polygraph

Bryn Neil is a technology development company. We develop, adapt and scale technical capabilities across any domain faster than anyone else, protecting our mission partners and ensuring program succe...

user avatar

Software Engineer - Level 3/4

New
Northrop Grumman
Apply today! Be one of the first candidates to apply for maximum exposure.
Redondo Beach, CA(On-Site/Office)
Posted today
TS/SCI
Not Specified

RELOCATION ASSISTANCE: Relocation assistance may be availableCLEARANCE REQUIRED FOR START: YesCLEARANCE TYPE: SCITRAVEL: Yes, 10% of the TimeDescriptionAt Northrop Grumman, our employees have incredib...

user avatar

Software Configuration Manager (SWCM) - CI Poly

New
Bryn Neil
Apply today! Be one of the first candidates to apply for maximum exposure.
Broomfield, CO(On-Site/Office)
Posted today
5+ yrs exp
TS/SCI
CI Polygraph

Bryn Neil is a technology development company. We develop, adapt and scale technical capabilities across any domain faster than anyone else, protecting our mission partners and ensuring program succe...

user avatar

Software Tester

New
Gridiron IT Solutions
Apply today! Be one of the first candidates to apply for maximum exposure.
Chantilly, VA(On-Site/Office)
Posted today
5+ yrs exp
TS/SCI
CI Polygraph

Business Analyst/Software Tester Location: Chantilly, VA Work Type: Onsite Remote Work: NO Job Description Gridiron IT is seeking a Software Tester with an active TS/SCI CI Polygraph to work onsite...

user avatar

Technical Support

New
Gridiron IT Solutions
Apply today! Be one of the first candidates to apply for maximum exposure.
Chantilly, VA(On-Site/Office)
Posted today
5+ yrs exp
TS/SCI
CI Polygraph

Technical Support Location: Chantilly, VA Work Type: Onsite Remote Work: NO Job Description Gridiron IT is seeking a Technical Support candidate to work with a friendly team with growth opportunit...

user avatar

AV Engineer - CI Poly

New
Zachary Piper Solutions, LLC
Apply today! Be one of the first candidates to apply for maximum exposure.
Mclean, VA(On-Site/Office)
Posted today
TS/SCI
Polygraph

Zachary Piper Solutions is currently seeking an AV Engineer to support a government customer based in McLean, VA . This position is a full-time, onsite role supporting mission-critical, multi-classifi...

user avatar

Information System Security Manager (SIGINT) (5268) (TS/SCI CI P

New
Smartronix, LLC
Apply today! Be one of the first candidates to apply for maximum exposure.
Fort Belvoir, VA(On-Site/Office)
Posted today
TS/SCI
CI Polygraph

SMX is seeking an Information System Security Manger (ISSM - SIGINT) who will be tasked with managing and maintaining the security posture of SIGINT systems in accordance with the standards establishe...

user avatar

Senior Systems Engineer - Top Secret Clearance Required

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
King Of Prussia, PA(On-Site/Office)
Posted today
TS/SCI
Not Specified

Job Number 727650BR Description:The coolest jobs on this planet... or any other... are with Lockheed Martin Space.At the dawn of a new space age, Lockheed Martin is a pioneer, partner, innovator and ...

user avatar

Contracts Administrator

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
Herndon, VA(On-Site/Office)
Posted today
TS/SCI
Not Specified

Job Number 727624BR Description:Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities...

user avatar

Senior Staff Mechanical Engineer (Thermal Engineering)

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
Littleton, CO(On-Site/Office)
Posted today
TS/SCI
Polygraph

Job Number 727581BR Description:Space is a critical domain, connecting ourtechnologies, our security and our humanity.While others view space as a destination, we seeit as a realm of possibilities, w...

user avatar

Software Engineer Staff

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
Colorado Springs, CO(On-Site/Office)
Posted today
TS/SCI
Not Specified

Job Number 727570BR Description:Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities...

user avatar

Systems Engineer IT Sr

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
Fort Belvoir, VA(On-Site/Office)
Posted today
TS/SCI
Polygraph

Job Number 727514BR Description:WHO WE ARELockheed Martin is a global leader in aerospace, defense, and technology solutions, dedicated to pushing the boundaries of innovation and shaping the future ...

user avatar

Software Engineering Manager

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
King Of Prussia, PA(On-Site/Office)
Posted today
TS/SCI
Not Specified

Job Number 727279BR Description:Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities...

user avatar

Software Developer Cyber SWE - Early Career Engineer

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
Hanover, MD(On-Site/Office)
Posted today
TS/SCI
Polygraph

Job Number 727154BR Description:This position is participating in our External Referral Program. If you know somebody who may be a fit, click here to submit a referral. If your referral is hired, you...

user avatar

Systems Engineer CONOPS Lead

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
Highlands Ranch, CO(On-Site/Office)
Posted today
TS/SCI
Not Specified

Job Number 727275BR Description:Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities...

user avatar

Software Engineering Manager - Space Protection Programs

New
Lockheed Martin
Apply today! Be one of the first candidates to apply for maximum exposure.
Sunnyvale, CA(On-Site/Office)
Posted today
TS/SCI
Polygraph

Job Number 727425BR Description:Space is a critical domain, connecting our technologies, our security and our humanity. While others view space as a destination, we see it as a realm of possibilities...

user avatar
ClearanceJobs
  • About Us
  • Support
  • Browse Jobs
  • Security Clearance FAQs
  • AgileATS
  • FedWork
  • Blog
Download on the App StoreGet it on Google Play
© 2026 ClearanceJobs - All rights reserved. ClearanceJobs is a DHI service .
  • Pay My Bill
  • EULA
  • Privacy Policy
  • Terms of Service
  • My Privacy Rights
  • Contact Us