System Engineer, Senior

Reference: 735042BRPosted: 2026-08-06Location: Littleton, ColoradoSalary: $89,300 - $157,550Clearance: Top SecretCompany: Lockheed MartinDescription: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, where we can do more — we can innovate, invest, inspire and integrate our capabilities to transform the future. At Lockheed Martin Space, we aim to harness the full potential of space to cultivate innovation, reduce costs, and push the boundaries of what technology can achieve. We’re creating future-ready solutions, focusing on resiliency and urgency through our 21st Century Security vision. We’re erasing boundaries and forming partnerships across industries and around the world. We’re advancing spacecraft and the workforce to fuel the next generation. And we’re reimagining how space can connect us, ensuring security and prosperity.Join us in shaping a new era in space and find a career that's built for you.For over 70 years, the Fleet Ballistic Missile (FBM) team has supported the Navy’s mission to provide affordable and credible strategic defense. We offer unique career opportunities and challenges on a program with a rich history and exciting future. We help keep this nation and our allies secure. The FBM Program is experiencing significant growth and we need your expertise to deliver amazing new technologies to our customers while maintaining the technical requirements of the strategic deterrence.Learn about the Trident II D5 Fleet Ballistic Missile.Lockheed Martin (LM) is looking for an resourceful Systems Engineer, Senior to become a member of the Systems Engineering and Integration Team (SEIT).As a Systems Engineer, Senior member of the SEIT Interfaces team, you will:• Work as liaison between a diverse array of teams from several technical disciplines both within and outside of Lockheed Martin. • Facilitate and coordinate technical discussions regarding translation of the system requirements and architecture into a set of agreements on critical design parameters for each party to meet in order to fulfill customer needs. • Evaluate, communicate, document, and maintain the agreed upon design solution between teams.• Focus on the physical interfaces (mechanical fit, compatibility, and dynamic interoperability of physical systems) between systems and subsystems in a highly complex system-of- systems environment. • Work both independently and as part of an integrated team to execute detailed action plans to accomplish major efforts involving multiple teams.The successful Candidate will:• Meet each of the Basic Qualifications• Have 3+ years of professional experience with a Bachelor's (related Internships/Coops may be considered)• Hold an Active Secret Clearance with the ability to obtain a Top Secret Clearance• Have the ability to work On-Site at our Littleton, CO campus Full-TimeBasic Qualifications:• Experience with 3D parametric computer aideddesign (CAD) modeling software; Creo and/or similar • Experience working with various engineering disciplines (i.e. mechanical, electrical, safety, test, etc.) to develop System Engineering Products• Must have a Secret clearance with the ability to obtain and maintain a Top Secret clearance; US Citizenship requiredDesired Skills:• Demonstrated ability to learn• Knowledge in Systems Engineering concepts and processes• Demonstrated ability to work within and coordinate multi-disciplinary teams• Experience with design, integration and/or test of mechanical systems• Experience with PTC Creo (and/or AutoCAD programs) to create physical interface models and drawings • Ability to create and manage Interface Control Documentation• Excellent written and verbal communication skills, excellent social skills, and ability to create consensus among peers while forming ​relationships with team members• Knowledge of Interfaces• Knowledge of DOORS• Knowledge of CAMEO• Knowledge of Requirements• Knowledge of MBSE• Experience in systems engineering, preferably in a defense or aerospace environment• Experience with coordinating Systems Milestones reviews (SRR, PDR, CDR)• Strong understanding of systems engineering principles • Ability to articulate detailed technical andprogrammatic issues to subordinates, peers,management and customers• Active Top Secret clearanceSecurity Clearance Statement: This position requires a government security clearance, you must be a US Citizen for consideration.Clearance Level: Top SecretOther Important Information You Should KnowExpression 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 offPay Rate: The annual base salary range for this position in California, Massachusetts, and New York (excluding most major metropolitan areas), Colorado, Hawaii, Illinois, Maryland, Minnesota, New Jersey, Vermont, Washington or Washington DC is $89,300 - $157,550. For states not referenced above, the salary range for this position will reflect the candidate’s final work location. Please note that the salary information is a general guideline only. Lockheed Martin considers factors such as (but not limited to) scope and responsibilities of the position, candidate's work experience, education/ training, key skills as well as market and business considerations when extending an offer.Benefits offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Education Assistance, Parental Leave, Paid time off, and Holidays. (Washington state applicants only) Non-represented full-time employees: accrue at least 10 hours per month of Paid Time Off (PTO) to be used for incidental absences and other reasons; receive at least 90 hours for holidays. Represented full time employees accrue 6.67 hours of Vacation per month; accrue up to 52 hours of sick leave annually; receive at least 96 hours for holidays. PTO, Vacation, sick leave, and holiday hours are prorated based on start date during the calendar year.This position is incentive plan eligible.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 ProfessionalBusiness Unit: SPACERelocation Available: PossibleCareer Area: Systems Engineering: OtherType: Full-TimeShift: First