Senior Specialist, Systems Engineer

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 for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work‑life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech. With customers’ mission‑critical needs always in mind, our employees deliver end‑to‑end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. As a Senior Specialist, Systems Engineer, you will contribute to a diverse technical team on the Maintenance of Space Situational Awareness Integrated Capabilities (MOSSAIC) Space Surveillance Telescope (SST) team. This position supports the Space Defense portfolio within the Space & Mission Systems segment, a great team of talented professionals with world‑class technical expertise who take a collaborative approach to engineering and enjoy working together. We have a long history of innovative and exceptional performance; we have earned our place as a trusted provider to our customers. In this position, you will bring your systems engineering background to a system engineering role where you can make a broad impact on programs and projects that are critical to our customers! Essential Functions 2+ years’ experience with SysML/MBSE Excellent communication and presentation skills and the ability to work harmoniously in a team environment with government customers and other contractors Ability to negotiate solutions among functional groups (Systems Engineering, Mission Engineering, Software Engineering, etc.) Proven analytical and troubleshooting skills demonstrated by related work experience Strong coordination and organization skills with a focus on details Proficient with domain knowledge (space systems engineering, ground optical systems, general systems) Participate in agile execution, MBSE, and requirements analysis. Possess interpersonal leadership skills with support to customers, including meetings and briefings. Possess DoD engineering experience, System Development Life Cycle knowledge, familiarity with DoD 5000. Experience with DoD Systems Engineering artifacts (SEP, SEMP, TEMP, CMP, DMP). Experience with INCOSE and/or NASA Systems Engineering Handbook requirements writing guide. Potential 10% travel required. Qualifications Bachelor’s Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related experience. In lieu of a degree, minimum of 10 years of prior related experience. Active Secret security clearance. Preferred Additional Skills Experience with and knowledge of Space Domain Awareness mission and systems Experience with MagicDraw MBSE tool Experience with development and editing of MBSE diagrams, requirements, use‑cases, and traceability to requirements Experience with Engineering Drawings and traceability MagicDraw Rational Dynamic Object‑Oriented Requirements System (DOORs) experience SysML/MBSE experience Willingness to travel to remote location for up to a month per year In compliance with pay transparency requirements, the salary range for this role in Colorado state is $92,500-$171,500. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. L3Harris also offers a variety of benefits, including health and disability insurance, 401(k) match, flexible spending accounts, EAP, education assistance, parental leave, paid time off, and company‑paid holidays. The specific programs and options available to an employee may vary depending on date of hire, schedule type, and the applicability of collective bargaining agreements. The application window for this position will close on 10/1/2026. L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug‑free workplace and performs pre‑employment substance abuse testing and background checks, where permitted by law. Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information. By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions. L3Harris Technologies is an E‑Verify Employer. Please click here for the E‑Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish. #J-18808-Ljbffr