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System Engineer Sr - Level 3 - Top Secret Clearance Required

Lockheed Martin

Engineering Jobs

System Engineer Sr - Level 3 - Top Secret Clearance Required

internshipPosted: Dec 17, 2025

Job Description


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 builder. Our amazing people are on a mission to make a difference in the world and every single day we use our skills and experiences to create, design, and build solutions to some of the worlds’ hardest engineering problems. Our culture encourages employees to dream big, perform with excellence, and create incredible products. We provide the resources, inspiration and focus and if you have the passion and courage to dream big, we want to build a better tomorrow with you.

**** This Position is contingent upon program award expected in early 2026.****

You will be responsible for developing system level artifacts and engaging with customers, mission partners, and other stakeholders to satisfy and fulfill customer directed objectives

As a member of the Systems Engineering team you will:
• Perform in an accelerated, collaborative, dynamic small team environment, closely integrated with customers and contractors
• Ensure consistency of requirements and traceability back to customer objectives
• Planning and generating test cases in support of program milestone testing events
• Perform requirements verification to ensure the system is able to meet customer needs
• Ensure consistency of feature acceptance criteria to meet customer objectives

Successful Applicants will demonstrate effective communication skills, desire challenges and be willing to engage in frequent internal interactions with peers, teammates, and customers.

Selected applicants must meet eligibility requirements for access to classified information, and must maintain the required security throughout the course of employment
Basic Qualifications:
• Experience working with Agile teams leveraging Scrum or Kanban
• Ability to communicate effectively and work in a collaborative environment
• Experience developing Systems Engineering artifacts (e.g. requirements, architecture, procedures, etc.)
• This position requires a Top Secret clearance with investigation date within 5 years clearance prior to start with the ability to obtain and maintain an SCI clearance
Desired Skills:
• Experience with model-based systems engineering (MBSE) and proficiency with systems engineering toolsets
• Experience with modern engineering practices such as Cross-Functional Agile teams
• Experience with Systems Engineering tools such as JIRA, and Confluence.
• Ability to interact with software developers to ensure mission requirements are satisfied
• Experience with Integration testing, software testing, system testing and independent verification and validation
• Experience with DevOps, CI/CD Pipelines, and deploying applications to test environments
• Experience writing, reviewing, tracing, and verifying requirements
• Experience working with external interfaces and generating documentation (e.g. ICDs) to support integration
Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.
Clearance Level: TS/SCI
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: Systems Engineering: Software
Type: Full-Time
Shift: First

Locations

  • King of Prussia, Pennsylvania, United States

Salary

Estimated Salary Rangemedium confidence

140,000 - 180,000 USD / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • Agile teams (Scrum or Kanban)intermediate
  • effective communicationintermediate
  • collaborative environmentintermediate
  • Systems Engineering artifactsintermediate
  • requirements verificationintermediate
  • JIRAintermediate
  • Confluenceintermediate
  • MBSEintermediate
  • DevOpsintermediate
  • CI/CD Pipelinesintermediate

Required Qualifications

  • Experience working with Agile teams leveraging Scrum or Kanban (experience)
  • Ability to communicate effectively and work in a collaborative environment (experience)
  • Experience developing Systems Engineering artifacts (e.g. requirements, architecture, procedures, etc.) (experience)
  • This position requires a Top Secret clearance with investigation date within 5 years clearance prior to start with the ability to obtain and maintain an SCI clearance (experience)

Preferred Qualifications

  • Experience with model-based systems engineering (MBSE) and proficiency with systems engineering toolsets (experience)
  • Experience with modern engineering practices such as Cross-Functional Agile teams (experience)
  • Experience with Systems Engineering tools such as JIRA, and Confluence. (experience)
  • Ability to interact with software developers to ensure mission requirements are satisfied (experience)
  • Experience with Integration testing, software testing, system testing and independent verification and validation (experience)
  • Experience with DevOps, CI/CD Pipelines, and deploying applications to test environments (experience)
  • Experience writing, reviewing, tracing, and verifying requirements (experience)
  • Experience working with external interfaces and generating documentation (e.g. ICDs) to support integration (experience)

Responsibilities

  • Perform in an accelerated, collaborative, dynamic small team environment, closely integrated with customers and contractors
  • Ensure consistency of requirements and traceability back to customer objectives
  • Planning and generating test cases in support of program milestone testing events
  • Perform requirements verification to ensure the system is able to meet customer needs
  • Ensure consistency of feature acceptance criteria to meet customer objectives

Benefits

  • general: flexible schedules
  • general: competitive pay
  • general: comprehensive benefits
  • general: 9x80 every other Friday off

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Lockheed Martin logo

System Engineer Sr - Level 3 - Top Secret Clearance Required

Lockheed Martin

Engineering Jobs

System Engineer Sr - Level 3 - Top Secret Clearance Required

internshipPosted: Dec 17, 2025

Job Description


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 builder. Our amazing people are on a mission to make a difference in the world and every single day we use our skills and experiences to create, design, and build solutions to some of the worlds’ hardest engineering problems. Our culture encourages employees to dream big, perform with excellence, and create incredible products. We provide the resources, inspiration and focus and if you have the passion and courage to dream big, we want to build a better tomorrow with you.

**** This Position is contingent upon program award expected in early 2026.****

You will be responsible for developing system level artifacts and engaging with customers, mission partners, and other stakeholders to satisfy and fulfill customer directed objectives

As a member of the Systems Engineering team you will:
• Perform in an accelerated, collaborative, dynamic small team environment, closely integrated with customers and contractors
• Ensure consistency of requirements and traceability back to customer objectives
• Planning and generating test cases in support of program milestone testing events
• Perform requirements verification to ensure the system is able to meet customer needs
• Ensure consistency of feature acceptance criteria to meet customer objectives

Successful Applicants will demonstrate effective communication skills, desire challenges and be willing to engage in frequent internal interactions with peers, teammates, and customers.

Selected applicants must meet eligibility requirements for access to classified information, and must maintain the required security throughout the course of employment
Basic Qualifications:
• Experience working with Agile teams leveraging Scrum or Kanban
• Ability to communicate effectively and work in a collaborative environment
• Experience developing Systems Engineering artifacts (e.g. requirements, architecture, procedures, etc.)
• This position requires a Top Secret clearance with investigation date within 5 years clearance prior to start with the ability to obtain and maintain an SCI clearance
Desired Skills:
• Experience with model-based systems engineering (MBSE) and proficiency with systems engineering toolsets
• Experience with modern engineering practices such as Cross-Functional Agile teams
• Experience with Systems Engineering tools such as JIRA, and Confluence.
• Ability to interact with software developers to ensure mission requirements are satisfied
• Experience with Integration testing, software testing, system testing and independent verification and validation
• Experience with DevOps, CI/CD Pipelines, and deploying applications to test environments
• Experience writing, reviewing, tracing, and verifying requirements
• Experience working with external interfaces and generating documentation (e.g. ICDs) to support integration
Security Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.
Clearance Level: TS/SCI
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: Systems Engineering: Software
Type: Full-Time
Shift: First

Locations

  • King of Prussia, Pennsylvania, United States

Salary

Estimated Salary Rangemedium confidence

140,000 - 180,000 USD / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • Agile teams (Scrum or Kanban)intermediate
  • effective communicationintermediate
  • collaborative environmentintermediate
  • Systems Engineering artifactsintermediate
  • requirements verificationintermediate
  • JIRAintermediate
  • Confluenceintermediate
  • MBSEintermediate
  • DevOpsintermediate
  • CI/CD Pipelinesintermediate

Required Qualifications

  • Experience working with Agile teams leveraging Scrum or Kanban (experience)
  • Ability to communicate effectively and work in a collaborative environment (experience)
  • Experience developing Systems Engineering artifacts (e.g. requirements, architecture, procedures, etc.) (experience)
  • This position requires a Top Secret clearance with investigation date within 5 years clearance prior to start with the ability to obtain and maintain an SCI clearance (experience)

Preferred Qualifications

  • Experience with model-based systems engineering (MBSE) and proficiency with systems engineering toolsets (experience)
  • Experience with modern engineering practices such as Cross-Functional Agile teams (experience)
  • Experience with Systems Engineering tools such as JIRA, and Confluence. (experience)
  • Ability to interact with software developers to ensure mission requirements are satisfied (experience)
  • Experience with Integration testing, software testing, system testing and independent verification and validation (experience)
  • Experience with DevOps, CI/CD Pipelines, and deploying applications to test environments (experience)
  • Experience writing, reviewing, tracing, and verifying requirements (experience)
  • Experience working with external interfaces and generating documentation (e.g. ICDs) to support integration (experience)

Responsibilities

  • Perform in an accelerated, collaborative, dynamic small team environment, closely integrated with customers and contractors
  • Ensure consistency of requirements and traceability back to customer objectives
  • Planning and generating test cases in support of program milestone testing events
  • Perform requirements verification to ensure the system is able to meet customer needs
  • Ensure consistency of feature acceptance criteria to meet customer objectives

Benefits

  • general: flexible schedules
  • general: competitive pay
  • general: comprehensive benefits
  • general: 9x80 every other Friday off

Target Your Resume for "System Engineer Sr - Level 3 - Top Secret Clearance Required" , Lockheed Martin

Get personalized recommendations to optimize your resume specifically for System Engineer Sr - Level 3 - Top Secret Clearance Required. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "System Engineer Sr - Level 3 - Top Secret Clearance Required" , Lockheed Martin

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

AerospaceDefenseSecurity Clearance72C1A00:CS3 Space Security

Answer 10 quick questions to check your fit for System Engineer Sr - Level 3 - Top Secret Clearance Required @ Lockheed Martin.

Quiz Challenge
10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.