Fiber Optic Specialist - Second Shift

Commonwealth Fusion Systems

1050

Somerville, MA, United States

Posted on: 2025-09-23

Category: renewables

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Employment type:

Full time

Experience required:

Intermediate

Salary

Salary not provided

About the company:

Commonwealth Fusion Systems (CFS) is on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity’s biggest challenges.

It’s urgent. The gap between the energy we need and the energy we have is widening every day. Fusion is a critical part of the energy transition away from fossil fuels, a new chapter for the world’s energy supply.

We’re committing to delivering fusion power plants and a full-fledged fusion energy industry as we’ve delivered on other promises. Like the world’s strongest high-temperature superconducting magnet, the game-changing technology that’s making commercial fusion energy a reality.

We’ve raised over $2 billion in capital — more than any other fusion energy company — and attracted top talent to design, build, and deliver commercial fusion power plants. And we’re working with policymakers and suppliers to make fusion energy available globally.

As we push toward the fusion-energy future, we’ll keep setting and meeting milestones, sharing and validating our progress, and encouraging others to do the same.

About Commonwealth Fusion Systems:

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.

Combining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future.

We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world.

Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.

If that’s you and this role fits, we want to hear from you.

Join the power movement as a Fiber Optic Specialist

The Fiber Optic Applications Technician is an exciting and evolving role with a responsibility for assisting R&D and production staff with all aspects of optical fiber work such as fiber splicing, testing, and incorporation of fibers into complex design features while minimizing damage and attenuation to the fiber throughout its lifetime. The technician will ensure functional operation and preventative maintenance of equipment as well as continuous improvement. Responsibilities include close cooperation with Operations, Maintenance, Quality and other departments to ensure goals and objectives are met. This role will lead the way to making Earth sustainable for the future to come.

This work is conducted within a multi-disciplinary team of technicians and engineers. Participation and clear, concise communication while working with the team is crucial.

This position will cover second shift- 2:30 pm - 11:30 pm.

#LI-Onsite

At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

What you'll do:

Work with engineering to develop splicing/routing techniques of >1000 fibers to minimize complexity, time, and cost

Train manufacturing technicians in the proper installation, splicing, routing, and measurement procedures

Improve safety protocols for laser and fiber optic handling

Fulfill manufacturing and R&D fiber needs

What we’re looking for:

4+ years experience in fiber optics applications with focus on splicing, 7+ years' experience preferred

Experience with Fiber Optic Testing: taking attenuation, insertion loss, and/or spectral analysis measurements using measurement equipment (for example OTDR, OSA, OBR, power meter, etc.)

Bonus points for:

Experience fiber handling in a lab setting with known standards

Experience in utilizing distributed sensing arrays (FBG preferred)

Experience with polyimide coated fibers

At least 1 year experience in teaching and/or training fiber splicing techniques and cable assemblies

Experienced with designing, building, and testing fiber cable assemblies, particularly in cryogen and vacuum conditions

Skills:

* Fiber coating removal

* Fiber re-coating

* Specialty fiber splicing

* Fiber proof-testing

Measurement techniques using optical tools and equipment such as interrogators, fault locators, OTDR, etc.

Knowledgeable about various optics sensing techniques and optical attenuation/insertion loss mechanisms

Basic Materials Science knowledge

Good communication skills

Good attention to detail

Must-have Requirements:

Ability to occasionally lift up to 50 lbs

Perform activities such as stooping, typing, standing, or sitting for extended periods of time, may need to operate in small confined places in odd locations

Dedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, and cryogenics

Willingness to travel or work required nights/weekends/on-call occasionally

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