Senior Specialist, Systems Engineering (Modeling and Simulation)

L3Harris Technologies; Schriever Space Force Base (CO); On-site; USD 93,000 - 172,000; Full time

Benefits offered by this job

Health and disability insurance

401(k) match

Flexible spending accounts

Education assistance

Parental leave

Paid time off

Company-paid holidays

Job summary

L3Harris Technologies invites applications for a Senior Specialist, Systems Engineering, Model and Simulation Systems Engineer at Schriever Space Force Base, CO. The role develops concepts of operations and system architectures to enable live, virtual, and constructive training for USSPACECOM missions.

The candidate will work with government and contractor teams, applying STK and MBSE/SysML tools to advance warfighting concepts.

Qualifications

• Bachelor’s degree with 6+ years of relevant experience; graduate degree with 4+ years; or 10 years in lieu of degree.
• Active Top Secret clearance with SCI eligibility and ability to obtain a polygraph.

Responsibilities

• Develop concept of operations and notional system architecture for live, virtual, and constructive training.
• Support space operations and space warfighting mission analysis for NSDC at Schriever SFB.
• Generate, share, and present briefings for senior leadership and enterprise awareness.
• Collaborate with Government and Contractor staff to advance tactics, techniques, and procedures.

Skills

STK

MBSE

SysML

Space operations

Orbital mechanics

Wargame modeling

AoA analysis

Space Domain Awareness

SDCCS

Iron Stallion

Security clearance

Education

Bachelor’s Degree

Graduate Degree

Tools

STK

MBSE tools

SysML modeling tools

Job description

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.

Job Title: Senior Specialist, Systems Engineering (Model and Simulation Systems Engineer)

Job Code: 42289

Job Location: Schriever Space Force Base, CO

Job Schedule: 5/8 Monday-Friday

L3Harris Technologies has an opening for a Model and Simulation Systems Engineer for an important national Security Program.

The successful candidate will support a high-performing team of Government and Contractor professionals in developing a concept of operations and a notional system architecture to enable future live, virtual, and constructive training, exercises, and experiments for command and control of USSPACECOM-assigned tactical units. This role requires experience in space operations, COA and TTP execution, and the Space Warfighting mission. Additionally, the candidate must demonstrate the ability to thrive in a dynamic, high-energy environment with constantly evolving tasks and priorities. This position supports the Space Superiority Business within the Space Systems sector.

Essential Functions:

• Professional that is highly skilled in Systems Tool Kit (STK) and other simulation tools in order to support space operations, current and future operations (CUOPS & FUOPS), and training at the National Space Defense Center (NSDC) at Schriever SFB.
• Model and Simulation efforts will be used to increase customer capability for live, virtual and constructive training as well as expanding NSDC Advanced Concept Experimentation (NACE).
• Modeling and Simulation of real-world engagements, training events, and mission planning operations will play a key role in expanding customer understanding of the warfighting domain and support the development of tactics, techniques, and procedures.
• Mod and Sim products will provide a foundation for future requirements development of common operating picture tools used in operations.
• Participating in exercises and other government driven events to derive performance benchmarks and technical utility.
• Work full-time at a customer site in Colorado Springs
• Generate, share, present briefings and products for senior leadership and enterprise awareness.
• Perform additional duties and responsibilities as assigned.

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 Top Secret clearance with Sensitive Compartmented Information eligibility and the ability to obtain a Counterintelligence Polygraph.

Preferred Additional Skills:

• Requires strong knowledge of space operations, orbital mechanics, and the Space Domain Awareness mission area.
• Possess advanced knowledge of Systems Tool Kit (STK), Model Based Systems Engineering software (MBSE), and Systems Modeling software (SysML); knowledge of Space Domain Command and Control System (SDCCS) or Iron Stallion (IS) is beneficial.
• Experience with wargame model development and the integration of real-world data into hypothetical analysis.
• Experience developing courses of action for operational maneuvers and applying analysis of alternatives (AoA) in operations planning and what-if drills.
• Possess a broad range of knowledge of space systems to include DoD, national assets and adversary systems.

In compliance with pay transparency requirements, the salary range for this role in Colorado is $92,500 to $171,500.00. 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 11/21/2026

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.