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Senior Software Engineer (Top Secret Clearance)

Lockheed Martin

Posted today

Job Requirements

King of Prussia, PA
Top Secret Polygraph Unspecified
Career Level not specified
Salary not specified
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Job Description

Job Number 720814BR

Description:Lockheed Martin's Victor Portfolio of Space Security is seeking a highly skilled, motivated, and experienced Senior Software Engineer to join an Agile, cross-functional team dedicated to protecting critical space assets. This role will focus on developing web-based applications within an open-architecture infrastructure that supports mission-critical space-security operations. The successful candidate will collaborate with internal development teams and subject-matter experts, and thrive in a fast-paced environment where each day brings new challenges.

Key Responsibilities
• Full-Lifecycle Development - Design, implement, test, deploy, and maintain web applications and services that enable space-asset protection.
• Agile Collaboration - Participate in Scrum ceremonies (stand-ups, sprint planning, retrospectives) and contribute to continuous-improvement of team processes.
• Open-Architecture Integration - Build modular, reusable components that conform to open-architecture standards and facilitate integration with existing and future mission systems.
• Technical Leadership - Mentor junior engineers, conduct code reviews, and drive adoption of best practices (CI/CD, automated testing, secure coding, performance profiling).
• Stakeholder Engagement - Work closely with domain experts to translate mission needs into technical solutions.

Applicants selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information, and must maintain the required security throughout the course of employment.

*** This position is contingent upon the program award expected in Summer of 2026 ***
Basic Qualifications:
• Proficiency in modern languages such as Java, C#, Python, or JavaScript/TypeScript; strong understanding of object-oriented design and principles.
• Hands-on experience with RESTful APIs, HTML5, CSS3, modern JavaScript frameworks (e.g., React, Angular, Vue), and UI/UX best practices.
• Familiarity with pipelines (Jenkins, GitLab CI, Azure DevOps), containerization (Docker, Kubernetes), and version control (Git).
• Proven track record working in Scrum or Kanban teams; comfortable with iterative development and rapid feedback cycles.
• US citizenship is required to obtain a government security clearance
• Active DOD Top Security Clearance with an investigation or Continuous Vetting (CV) date within 5 years
Desired Skills:
• Experienced with Horizon software application providing command and control services for satellites, antennas, and ground hardware assets.
• Experience in application containerization (e.g. Docker, Kubernetes, Helm, etc.) in a cloud environment (AWS/Azure/Openstack/Openshift)
• Hands-on experience with RESTful APIs, HTML5, CSS3, modern JavaScript frameworks (e.g., React, Angular, Vue), and UI/UX best practices.
• Domain Experience in Mission Management, Planning and Scheduling, Orbital Mechanics, SSA (Space Situational Awareness)

#LMSpaceSoftwareEng
#SpaceSecurity
Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.
Clearance Level: Top Secret with Investigation or CV date within 5 years
Other Important Information You Should Know
Expression of Interest: By applying to this job, you are expressing interest in this position and could be considered for other career opportunities where similar skills and requirements have been identified as a match. Should this match be identified you may be contacted for this and future openings.
Ability to Work Remotely: Onsite Full-time: The work associated with this position will be performed onsite at a designated Lockheed Martin facility.
Work Schedules: Lockheed Martin supports a variety of alternate work schedules that provide additional flexibility to our employees. Schedules range from standard 40 hours over a five day work week while others may be condensed. These condensed schedules provide employees with additional time away from the office and are in addition to our Paid Time off benefits.
Schedule for this Position: 9x80 every other Friday off
Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.
The application window will close in 90 days; applicants are encouraged to apply within 5 - 30 days of the requisition posting date in order to receive optimal consideration.
At Lockheed Martin, we use our passion for purposeful innovation to help keep people safe and solve the world's most complex challenges. Our people are some of the greatest minds in the industry and truly make Lockheed Martin a great place to work.

With our employees as our priority, we provide diverse career opportunities designed to propel, develop, and boost agility. Our flexible schedules, competitive pay, and comprehensive benefits enable our employees to live a healthy, fulfilling life at and outside of work. We place an emphasis on empowering our employees by fostering an inclusive environment built upon integrity and corporate responsibility.

If this sounds like a culture you connect with, you're invited to apply for this role. Or, if you are unsure whether your experience aligns with the requirements of this position, we encourage you to search on Lockheed Martin Jobs , and apply for roles that align with your qualifications.
Experience Level: Experienced Professional
Business Unit: SPACE
Relocation Available: Possible
Career Area: Software Engineering
Type: Full-Time
Shift: First
group id: lckmtncx

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The F-35, PAC-3, and the GOES weather satellite... What do all of these technologies have in common, you might ask? Talented people, plus a company culture that isn't afraid to get things done. At Lockheed Martin, you'll be able to solve a broad range of issues, covering everything from national security to environmental protection, supported not only by our extensive resources but also a long legacy of getting things done. We apply our passion for purposeful innovation to keep people safe and solve the world's most complex challenges. We help employees experience a mission that matters through: Mission-Focused Innovation; Foundational Values; Diverse Career Opportunities with Meaningful Work; Your Health, Your Wealth, Your Life; and Empowered to Be Your Best. Join us at Lockheed Martin. Your mission is ours.
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Job Category
IT - Software
Clearance Level
Top Secret