
Fiber Optic Specialist

Commonwealth Fusion Systems (CFS)
Company Overview
Commonwealth Fusion Systems
Cambridge, MA, United States
2018
Business Model
Energy
Commonwealth Fusion Systems focuses on developing advanced fusion energy technology. Their core activities include research and development of superconducting magnets and fusion reactors aimed at providing a clean and virtually limitless energy source.
Their revenue streams primarily come from government grants, private investments, and partnerships with various organizations in the energy sector.
Locations & Geography
Commonwealth Fusion Systems operates primarily in the United States, with a significant presence in Cambridge, MA. They are also involved in international collaborations, expanding their influence in the global energy landscape.
Company Culture
Their mission is to accelerate the development of fusion energy to provide a sustainable and clean energy future. They value innovation, collaboration, and a commitment to scientific excellence.
Commonwealth Fusion Systems fosters a dynamic and inclusive work environment that encourages creativity and teamwork. Employees are motivated to push the boundaries of science and technology in a supportive atmosphere.
They emphasize continuous learning and professional growth, offering various training programs and opportunities for employees to advance their skills in the field of fusion energy.
Activities & Projects
Commonwealth Fusion Systems is currently working on the SPARC project, which aims to demonstrate net-positive energy from a fusion reactor. This project is a significant step towards commercial fusion energy.
They are pioneering the use of high-temperature superconductors in fusion technology, which enhances the efficiency and feasibility of fusion reactors. This innovation is crucial for making fusion energy a reality.
Their sustainability practices focus on developing clean energy solutions that minimize environmental impact. By harnessing fusion energy, they aim to provide a sustainable alternative to fossil fuels.
Career Opportunities
Commonwealth Fusion Systems typically has openings for roles in engineering, research, and project management. They seek individuals passionate about advancing fusion technology and contributing to a sustainable energy future.
They offer competitive salaries, comprehensive health benefits, and opportunities for professional development. Employees also enjoy a collaborative work culture that values innovation and creativity.
Contact Information
Last updated on 2025-03-27 | Report an issue
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 over $2 billion in capital – more than any other fusion energy company in the U.S.
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.
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 field applications, 7+ years' experience preferred
- Experience in utilizing distributed sensing arrays (FBG preferred)
- Experience with taking attenuation, insertion loss, and spectral analysis measurements using various measurement equipment (such as OTDR, OSA, OBR, power meter, etc.)
- Must have experience fiber handling in a lab setting with known standards
Bonus points for
- 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, optical multiplexers, optical switches, 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
$30 - $48 an hour
Salary range for this full-time position + equity + benefits. The actual salary will depend on level, location, qualifications, and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations. Benefits include:
- Competitive compensation with equity
- 12.5 Company-wide Holidays
- Flexible vacation days
- 10 sick days
- Generous parental leave policy
- Health, dental, and vision insurance
- 401(k) with employer matching
- Professional growth opportunities
- Team-building activities
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.
About the role
March 19, 2025
Full Time
Company
March 26, 2025
On-site
USD 30–48 per hour
Commonwealth Fusion Systems (CFS)
- Devens, Massachusetts, United States
4+ years preferred, 7+ years for preferred candidates
UTC-05:00
Apply now
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