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Plant Engineer

Quantinuum US
Tokyo, Japan
Posting live until
30 May 2024

Job Details

Quantinuum is expanding its business globally, and Japan plays a pivotal role in its development plan. We are developing quantum software, applications, and hardware that will have a future impact on our everyday lives. Our quantum computers keep improving their performance and continues to break records for quantum volume, one of the measures of quantum computer performance.

This Plant Engineer will be responsible for managing equipment, supplies, devices, and all other resources required for our to-be-opened quantum computer R&D laboratory in Greater Tokyo Area. This is an exciting opportunity to join at the onset of early stage of business expansion in Japan. 

You will work closely with our global ICS Operations team, which manages overall lab facility and projects as well as the Commercial Operation team which manages the actual quantum computer machine. You must have previous experience in managing technical equipment such as cryogenic systems, HVAC systems, optical lasers or fiber cables. Previous work experience in clean room environment, laboratory, manufacturing factory, chemical/material engineering area, electronics, or energy plant is a requirement. Experience in technology sector or Scientific research is highly appreciated. 

Key Responsibilities

  • Lead planning, development and management of our technical facility, in close collaboration with Japan team and global functional team.
  • Provide technical expertise throughout the project’s execution phase , including planning, engineering,  procurement, fabrication, installation, and commissioning. 
  • Perform analysis and develop basic instrumentation, control specifications, sizing of equipment and other infrastructure.
  • Support development and review of basic plant and equipment layout / general arrangement.
  • Work with the Plant Operations Manager to maintain HVAC, electrical and mechanical equipment, gas supply, cryogenic and liquefaction equipment, etc. in the occupied space while closely collaborating with the property management facilities team.  
  • Monitor and maintain key metrics in laboratory such as cryogenic system’s index, temperature, humidity, are at desired level.
  • Work with vendors to ensure all the laboratory and other supplies are in stock.
  • Support Plant Operations Manager to ensure the workplace is meeting all Environment, Health and Safety (EHS) requirements (workplace monitoring, emergency response procedure, first aid, employee training, PPE supply, hazardous material handling, etc. Develop Problem Solving solutions to support our facility and laboratory environments. 
  • Implement corrective/preventive action for technical issues in laboratory and escalate cases to respective leaders and counterparts.
  • Partner with technical team technicians and assist them to troubleshoot mechanical and other building management related systems.
  • Maintain our Preventive Maintenance schedule by ensuring all actions (PM, audits, inspections, etc.) are in the work order system. 
  • Schedule downtimes for construction and mechanical support of systems that maintain site operations and establish appropriate communication process with key stakeholders.  


  • Bachelor’s Degree or equivalent education in Science, ideally in Chemistry, Engineering, Physics Electronics.
  • 5+ years of working experience in manufacturing, technology related industry
  • 5+ years of experience in engineering in laboratory, factory, plant.
  • Experience in working in global, matrixed organization.
  • Fluency in both English & Japanese to conduct complex and technical business communication.
  • Ability to commute and work onsite at the laboratory.


  • High Pressure Gas Production Safety Manager license (高圧ガス製造保安責任者
  • Post graduate education.
  • An educational background in natural sciences or engineering.
  • Experience or a strong interest in quantum or emerging technologies.
  • International experience either in education or work.
  • Facility related certificate/license such as; Hazardous Materials Handler, Class 1 Health Supervisor, Electrician, Machinery maintenance technician

Location:  Metro Tokyo Area, Japan

Please note that employment with us is subject to successfully passing our pre-employment screening checks. We are an inclusive equal opportunity employer. You will be considered without regard to age, race, creed, color, national origin, ancestry, marital status, affectional or sexual orientation, gender identity or expression, disability, nationality, sex, or veteran status.

Quantinuum is the world’s leading integrated quantum computing company, formed in late 2021 by the combination of two leaders in the global ecosystem for quantum computing: Honeywell Quantum Solutions and Cambridge Quantum. Quantinuum’s mission is to accelerate the development of quantum computing and innovation of quantum technologies to deliver real-world quantum-enabled solutions for some of the most intractable problems that classical computers have not been able to solve.

We are an inclusive equal opportunity employer. You will be considered without regard to age, race, creed, color, national origin, ancestry, marital status, affectional or sexual orientation, gender identity or expression, disability, nationality, sex, or veteran status.


Quantinuum image

Our mission is to accelerate quantum computing and use its power to positively transform the world. By applying the laws of quantum physics to computing, we will achieve unprecedented breakthroughs in drug discovery, healthcare, materials science, cybersecurity, energy transformation, and climate change. Our team of scientists is leading the way in the development of quantum computing. As the world’s largest integrated quantum computing company, we united advanced software development with high-fidelity hardware to accelerate quantum computing. With full-stack technology, we’re scaling quantum computing and developing applications to solve the world’s most pressing challenges. We could be even better with you.

Why work for us
We offer an amazing opportunity to join a world-leading quantum computing company. You will be working alongside a highly talented team, with world-leading names in the quantum computing industry. We offer a highly competitive package, and we have a positive approach to flexible working.

Training and development
At Quantinuum, we believe quantum information systems will revolutionize the way we work and live. We are leading the way by helping our customers develop quantum-enabled solutions that provide a competitive edge in their markets. We are also investing in our team members development along the way. We believe in fostering a growth and learning mindset across our organization.

What we are looking for
Always on the leading edge of their fields, our hardware, software, sales, business, and operations teams are focused on personal, business, and technological growth. Curious, driven, and talented, our people are what makes Quantinuum tick. Every one of us is motivated to deliver on our mission to accelerate quantum computing. We are looking for team members with the same ambitions to join us.  

Broomfield, CO, Brooklyn Park, MN, and Arlington, VA, USA; London, Cambridge and Oxford, UK; Tokyo, Japan; Munich, Germany

Number of employees

Main areas of research
Trapped Ion quantum computing; cybersecurity; computational chemistry, compositional intelligence; machine learning

Positions recently recruited for
Experimental physicist; quantum error correction; electrical engineering; mechanical engineering; software engineering; AMO physicist; systems engineering

Desired degree  & disciplines
We hire employees at all degree levels (Ph.D./master’s/bachelor’s/associates). We are looking for AMO physicists with experimental or theory backgrounds. We are also hiring across many core engineering disciplines. The degrees would correspond with the hiring position titles listed (i.e. mechanical engineering degree would connect to a mechanical engineering job posting). Please see job postings for individual requirements

How to apply


Company info
303 S Technology Court

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