[Skip to main content](#main-content)

[ OpenNash ](https://opennash.com/) / [Jobs](https://jobs.opennash.com/) [ 01 Search jobs](https://jobs.opennash.com/search/)[ 02 Companies](https://jobs.opennash.com/explore/)[ 03 Hiring report](https://jobs.opennash.com/reports/hiring/)[ 04 AI assistants](https://jobs.opennash.com/connect/)[ 05 How it works](https://jobs.opennash.com/methodology/)

Lockheed Martin

# Cyber Systems Security Engineering Sr - E3

Littleton, CO, King of Prussia, PA Senior individual contributor Security 

Listed on Lockheed Martin’s official careers site. Posted October 30, 2026. Check that it is still open and apply there.
[Apply on Lockheed Martin’s careers site →](https://lockheedmartin.eightfold.ai/careers/job/996477500896)

[OpenNash Jobs](https://jobs.opennash.com/) / [Lockheed Martin](https://jobs.opennash.com/companies/lockheed-martin/) / Cyber Systems Security Engineering Sr - E3

The employer’s listing has no description we could read. See it on their site.

## At a glance
- Posted by the employer: Oct 30, 2026
- First seen by OpenNash: Nov 2, 2026
- Last checked: Nov 2, 2026
- Listed for: 3 days
- Location: Littleton, CO, King of Prussia, PA[Apply on Lockheed Martin’s careers site →](https://lockheedmartin.eightfold.ai/careers/job/996477500896)

## Hiring at Lockheed Martin
- Open jobs: 8,022
- New in the last 7 days: After two weekly collections
- Tracked since: Oct 15, 2026

[All Lockheed Martin jobs](https://jobs.opennash.com/companies/lockheed-martin/) · [Weekly hiring report](/reports/hiring/)

## More jobs at Lockheed Martin

### [Cyber Architect Sr Stf](https://jobs.opennash.com/companies/lockheed-martin/jobs/520aee30d418e8c689a1/)

Littleton, CO, King of Prussia, PA

### [Cyber Systems Security Engineering Stf - E4](https://jobs.opennash.com/companies/lockheed-martin/jobs/66e081bcb39f7fec23e6/)

Littleton, CO, King of Prussia, PA

### [Infrastructure Engineer IV](https://jobs.opennash.com/companies/lockheed-martin/jobs/228690bf4c790dada42d/)

Littleton, CO, King of Prussia, PA

### [Mk7 Thermal Protection Systems (TPS) Product Owner](https://jobs.opennash.com/companies/lockheed-martin/jobs/7462f669597f93924f97/)

Littleton, CO, King of Prussia, PA

### [Project Engineer Sr - Level 3](https://jobs.opennash.com/companies/lockheed-martin/jobs/9eca7380d7c263b44d0e/)

Littleton, CO, King of Prussia, PA

## Similar jobs at other companies

### [Security (Product, Systems, Cyber) Engineering Internship - Summer 2027](https://jobs.opennash.com/companies/qualcomm/jobs/bd3f109cd296093fd8e3/)

Qualcomm · San Diego, California, United States of America

### [Cyber Security, Information Systems Security Manager (ISSM)](https://jobs.opennash.com/companies/bae-systems/jobs/bc7b920627379e0a3add/)

BAE Systems · Hudson, New Hampshire, United States

### [Cyber Security, Information Systems Security Officer (ISSO)](https://jobs.opennash.com/companies/bae-systems/jobs/428f553613b2e41ffdd5/)

BAE Systems · Hudson, New Hampshire, United States

### [Cyber Security Systems Administrator - Cyber Security & TSOC - Akron FirstEnergy Headquarters](https://jobs.opennash.com/companies/firstenergy/jobs/6e2dfe4f8a6d65817570/)

FirstEnergy · Akron, OH, United States

### [Cyber Security Analyst Leads – Cyber Threat Hunting](https://jobs.opennash.com/companies/fidelity-national-information-fis/jobs/91371df9652b5fd4a662/)

Fidelity National Information (FIS) · Jacksonville, FL, United States of America

OpenNash lists jobs from employers’ own careers sites and does not handle applications.
Dates come from the employer where stated; “first seen” and “last checked” are our own observations.

[ OpenNash ](https://opennash.com/)

AI-native services firm that builds custom software and 24/7 AI agents.

OpenNash Jobs is an OpenNash Applied AI project.
[Book time with OpenNash](https://calendly.com/opennash/new-meeting?hide_gdpr_banner=1)

Jobs
- [Search jobs](https://jobs.opennash.com/search/)
- [Companies](https://jobs.opennash.com/explore/)
- [Hiring report](https://jobs.opennash.com/reports/hiring/)
- [AI assistants](https://jobs.opennash.com/connect/)
- [How it works](https://jobs.opennash.com/methodology/)

OpenNash
- [opennash.com](https://opennash.com/)
- [Services](https://opennash.com/ai-agent-consulting/)
- [OpenNash CX](https://opennash.com/cx/)
- [AI Tools](https://opennash.com/ai-tools/)
- [Blog](https://opennash.com/blog/)
- [About](https://opennash.com/about/)

Contact
- [hello@opennash.com](mailto:hello@opennash.com)

- [LinkedIn](https://www.linkedin.com/company/opennash)

- [Support](https://jobs.opennash.com/support/)

- [Privacy](https://jobs.opennash.com/privacy/)

- [Terms](https://jobs.opennash.com/terms/)

© 2026 OpenNash, Inc. Company names and public job postings belong to their respective owners. Employers control source availability and application decisions.