Fall 2026 Mechanical Engineering Intern

About this role

Sierra Space Careers: At Sierra Space, we build the missions and systems that keep our world secure in the domain above Earth.     Sierra Space team members share a spirit of innovation and collaboration and a belief that we can deliver on the boldest missions in space today. Together with our customers, we aim to safeguard our nation, sustain human presence in space, and secure the freedom of operations in low Earth orbit and beyond.  

Our success is measured by the trust of those who rely on what we build and deliver, and our technologies keep the United States and its allies mission-ready throughout space.

We are mission-driven, and together, we are an extraordinary team.

About the Role 2026 Fall Mechanical Engineering Intern About You Our mission is driven by an unyielding commitment to advancing space-based technology in service of our customers and safeguarding national security. We seek individuals who are passionate about innovating beyond boundaries and relentlessly pursuing solutions that protect, preserve and empower – to join us in this critical mission.  

We’re looking for team members who align with our values, mission and goals – while also meeting the minimum qualifications below. The preferred qualifications are a bonus, not a requirement.

Launch Your Future at Sierra Space   

Begin your career journey alongside the industry's most brilliant and innovative minds. At Sierra Space, interns engage with meaningful projects while developing the foundation for an exceptional career in aerospace and defense. Our early career professionals  benefit  from a distinctive experience—receiving dedicated mentorship while collaborating directly with recognized industry experts on real-world challenges aligned with their academic focus. Bring your knowledge and passion for learning, and  we'll  provide transformative experience.   

2026 Fall Internship

The Sierra Space Fall Internship will run from September – December of 2026 for undergrad students graduating between December 2026 and June 2027. Participants work on meaningful projects, network with industry experts, and develop skills at one of our state-of-the-art facilities.    

Position Available  

Mechanical Engineer:   Help design and test mechanical components use d   in spacecraft and   aerospace   systems.   You’l l   work   with engineers t o   develop CAD models, analyze mechanical performance, and support testing hardware   using tools such as MATLAB. Interns may contribute to   product   development   activities including prototyping, thermal analysis, stress   calculations , and material   selection   while   documenting engineering results.   You will   leave your internship with hands - on experience with mechanical design, manufacturing processes, and how hardware moves from concept to flight-ready systems!  

Professional Development   

During your internship, you will:   

• Master essential business processes and procedures   

• Strengthen your technical  expertise  through hands-on application and expert guidance   

• Engage in cross-functional workshops and leadership sessions that  provide  valuable insights into our operations and Sierra Space's forward-thinking culture    

• Join us in our mission to build the next generation of space innovation and become part of the team  that's  expanding humanity's reach beyond Earth.   

Minimum Qualifications  

• Actively enrolled in an undergraduate degree program.  

• Expected graduation date between December 2026-June 2027.   

• Passion for solving   problems by   leveraging   data and technology.   

• Excellent written and verbal communication   

• Ability to work in a highly collaborative team environment.   

• Strong organization skills, detail oriented, and self-initiative.   

• The ability to obtain and  maintain  a U.S. Security Clearance is  required .   

• To conform to U.S. Government international trade regulations, applicant must be a U.S. Citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State or U.S. Department of Commerce.   

 Preferred Majors  

• Aerospace Engineering  

• Industrial Engineering  

• Mechanical Engineering  

• Electrical Engineering  

• Computer Science  

• Information Science  

• Physics  

Office Environment  

Corporate,   in-person   internship  

Job Location  

We have opportunities available in the below locations for this role.  

• Centennial, CO

Compensation  

The pay rate for this internship is $30.00/hour   

About Sierra Space   

Headquartered in Colorado, Sierra Space is an industry-leading defense-tech space company. We design, manufacture, and deliver satellites, spacecraft and space subsystems including reusable spaceplanes, hypersonic technologies, propulsion systems, and infrastructure for the nation’s most critical missions.    

With more than three decades of space flight heritage, expansive classified and unclassified infrastructure and disruptive  cutting-edge  technology, Sierra Space is trusted by National Security, civil and commercial customers. Our flight-proven technologies advance our customers’ missions, including safeguarding our nation, protecting space-based assets, and enabling the next generation of space exploration and economic development.   

Sierra Space is dedicated to defining the new era of space defense, strengthening deterrence today and preserving freedom of action for generations to come.   

    Compensation :

Pay : $30.00 Elevate Your Career At Sierra Space, we are committed to your personal and professional development. We empower you to make profound and meaningful contributions and foster a vibrant culture of collaboration, where teamwork ignites breakthrough innovations.    We also offer a generous benefit package, including medical, dental, and vision plans, 401(k) with 150% match up to 6

Similar jobs

• Fall 2026 Engineering Internship — Mach · Huntington Beach, CA
• Mechanical Engineering Intern - Fall 2026 — Hermeus · Los Angeles, CA
• Mechanical Engineering Internship - Fall 2026 — Vital Lyfe · Los Angeles - Greater Area
• Mechanical Engineer Intern [Fall 2026] — Figureai · San Jose, CA
• Mechanical Engineering Intern - Fall — Make Rain · El Segundo, CA
• Mechanical Engineer Intern (Spring 2027) — Astranis · San Francisco
• Manufacturing Engineering Intern Fall 2026 — Rocketlab · Long Beach, CA
• Mechanical Engineering Intern (Winter/Spring 2027) — Formlabs · Somerville, MA