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Supplier Quality Engineer
BAE Systems
Fort Wayne, IN
…brilliant on the basics, and developing our teams and leaders? BAE systems puts our customers first – exemplified by our missions: “We Protect Those Who Protect…
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Buisness Development Director
BAE Systems
McLean, VA · Sterling, VA
…annual growth objectives. Working across program leadership, engineering, finance, security, recruiting, capture, and external partners, this role connects customer mission needs with…
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Inspector II
BAE Systems
Greenlawn, NY
Operations: Our Operations employees turn innovative engineering designs into real solutions to meet our customers’ needs. From Supply Chain, to manufacturing and test, Electronic Systems…
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Composite Technician
BAE Systems
Phoenix, AZ
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Lead Janus Core Software Architect
BAE Systems
Nashua, NH
…Core Software Architect to own the technical judgment to guide engineering decisions, evaluate risk, lead through significant operational events, and ensure the Janus Suite continues to…
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Optical Engineer Senior
BAE Systems
Westminster, CO · Broomfield, CO · Boulder, CO
Job Description As an optical engineer at BAE Systems Aerospace & Mission Systems (AMS), you will play a key role in advancing our technology and developing innovative optical systems for…
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Principal Quality Program Engineer
BAE Systems
Westminster, CO
Job Description BAE Systems Aerospace & Mission Systems (AMS) is looking for a Program Quality Engineer to join our team. The successful candidate will be a key program leadership member…
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Manufacturing Tech V (IUID Technical Specialist)
BAE Systems
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Compile, Organize and upload engineering documentation to customers data base.
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Herndon, VA
Job Description BAE Systems, a top‑ten prime contractor to the U.S. Department of Defense, enables the U.S. government to transform data into intelligence and provides engineering,…
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Data Analytics Engineer II
BAE Systems
Nashua, NH
…development opportunities, your chances to grow are limitless. BAE Systems' Digital Architecture Team (DAT) is looking to hire a Data Analytics Engineer II to join our team. We are…
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Electrical Engineer III
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Wilmington, NC
The Electrical Engineer will work closely with manufacturing engineering, technology development, operations, external system integrators, and machine builders to deliver fully integrated…
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SAP GATP & Batch Determination Specialist
Computer Task Group, Inc
Hercules, CA
- $60 to $63 USD / hour
Bachelor's degree in Information Systems, Computer Science, Supply Chain Management, Engineering, or a related discipline.
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Senior Data Modeler
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Dallas, TX
Use Erwin Data Modeler to manage subject areas, model templates, DDL generation, forward/reverse engineering, model versioning, and model comparisons.
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New construction – Engineering, fabrication and installation of mechanical systems for new projects following lean construction practices
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Quality Engineer I
Baxter Healthcare Corporation
Cleveland, MS
Support Manufacturing, Engineering, and Quality Management departments with the development and implementation of new processes and technology.
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Recruiter
NEW YORK POWER AUTHORITY
White Plains, NY
…recruiting experience to identify and engage talent across engineering and essential operational functions. You’ll partner closely with leaders and HR colleagues to deliver a thoughtful,…
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Machine Operator / Sr. Machine Operator
STENA
Baltimore, MD
- $22 to $25 USD / hour
…aerostructures including aircraft and rocket components, engine nacelle systems, thrust reversers and advanced composite products, we apply the latest digital technologies and automation in…
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Product Engineer
Saab Aeronautics Indiana LLC
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…candidate has strong analytical and communication skills, relevant engineering experience, and the ability to work effectively across functions. An understanding of aerospace configuration…
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C Lineman - Underground (PE)
Dallas, TX
…to construct and repair electrical underground distribution systems. You will work on energized and de‑energized powerlines and may be required to travel to different job sites, including…
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Operations Training Manager
Aligned Data Centers, LLC
United States
Partner with Operations, Engineering, Commissioning, Construction, Safety, Facility Managers, Maintenance Program Managers, and equipment SMEs to develop training on engineering design,…
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Permitting Coordinator - CC
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Pike Engineering employees play critical roles in ensuring that essential services like electric power, gas, telephone and wireless communications are up and running when people and…
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Electrical Engineer
CTDI
West Chester, PA
CTDI is a large-scale Engineering, Repair, and Logistics company that services the country’s largest wireless telecommunications providers, as well as the largest High-speed Internet &…
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Imaging Specialist
Connection
Wilmington, OH
- $24.04 to $30.29 USD / hour
Working under general supervision of the Mgr, Solution Engineering Group, the Imaging Specialist primarily creates images per design spec provided by Solution Architect for customer…
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Maintenance Supervisor
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AIC - Chemical Engineer
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Bachelor’s in chemical engineering or related field

ColdQuanta

Inertial Quantum Physicist

Louisville, CO, United States

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Job details

Experience: 2+ years of post-PhD experience in a postdoctoral role, quantum-related industry, precision measurement, or related hardware development environment
Posting language: English
Posted: Nov 3, 2026

Original job description

Infleqtion is a global quantum technology company solving the world's most challenging problems. The company harnesses neutral atom quantum technology to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables "quantum everywhere" through our ecosystem of devices and platforms. We are recruiting for a Staff Quantum Sensor Physicist to help translate customer needs into practical architectures and devices for deployable atom-based inertial and gravitational sensors.

LOCATION

Infleqtion has 6 office locations, operating out of Boulder, CO; Louisville, CO; Madison, WI; Chicago, IL; Melbourne, AU and Oxford, UK. This position is a full-time role based in our Louisville, CO office.

POSITION SUMMARY

The newly hired physicist will contribute to research, customer-driven development, and commercial projects to turn high-level mission needs into practical sensor concepts, requirements, error budgets, system architectures, and working instruments. The Quantum Physicist's role includes a combination of self-directed and collaborative efforts with a team of fellow physicists, engineers, and technicians.

This role is highly practical, hands-on, and system oriented. The successful candidate should be motivated by turning advanced AMO physics into useful instruments that can progress from R&D prototypes toward customer demonstrations and eventual deployed operation.

JOB RESPONSIBILITIES

The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time with or without notice.

Participates in research and development projects involving atom interferometry, atom-based inertial and gravitational sensing, cold-atom systems, laser systems, vacuum systems, controls, and quantum sensing systems
Translates customer needs, use cases, and specifications into practical quantum sensor architectures, requirements, error budgets, trade studies, operating concepts, and development plans
Supports development from concept and architecture phases all the way through test, operation, and eventual deployment
Develops and maintains physics models, simulations, calculations, and error budgets to guide architecture decisions, performance estimates, and identification of technical risks
Evaluates sensor concepts against real-world and deployed-system constraints including sensitivity, bandwidth, dynamic range, SWaP-C, environmental robustness, manufacturability, reliability, cost, schedule, and technical risk
Works with electrical, mechanical, software, firmware, vacuum, laser, and controls engineering teams to develop requirements, guide design trades, and convert physics concepts into buildable and operable instrument designs
Participates in proposal development and customer technical discussions, including practical work scope, risks, system concepts, and deployment considerations
Communicates project findings and progress to both internal stakeholders and external customers

Requirements

PhD in atomic physics, optical physics, quantum sensing, precision measurement, or related field
Practical experience with atom-based inertial and/or gravitational sensors, atom interferometry, or closely related AMO or precision-measurement hardware
Strong practical judgment in balancing physics performance against constraints such as reliability, operability, integration complexity, usability, cost, schedule, SWaP-C, environmental robustness, and technical risk
Experience designing, building, integrating, testing, operating, and debugging complex hardware and software systems
Experience developing models, simulations, calculations, and/or error budgets to inform instrument designs
Ability to work effectively with engineering teams on optical, mechanical, electrical, software, firmware, vacuum, laser, controls, packaging, and instrument-operation challenges
Professional-level communication skills, including the ability to share technical information clearly with technical and non-technical staff, leadership, and customers
Ability to travel domestically and potentially internationally up to 10%
Candidates must be authorized to work in the United States without current or future sponsorship

Additional Preferred Qualifications

Direct experience with atom interferometry, cold-atom gravimetry, gravity gradiometry, quantum inertial sensing, Bose Einstein condensates, or optical lattices
Experience building, testing, operating, or deploying practical AMO/quantum systems, including fieldable sensors, transportable instruments, or robust laboratory prototypes
Experience with cold or ultracold atoms, Bose-Einstein condensates, MOTs, optical lattices, or related technologies
Demonstrated ability to translate customer needs or performance goals into implementable system architectures, requirements, engineering trades, and test approaches
Experience writing proposals, leading technical work, serving as a Principal Investigator (PI) or technical lead, and/or working directly with customers
2+ years of post-PhD experience in a postdoctoral role, quantum-related industry, precision measurement, or related hardware development environment
This position may require access to information protected under U.S. export control laws and regulations, including the Export Administration Regulations (EAR) and the International Traffic in Arms Regulations (ITAR). Please note that any offer for employment may be conditioned on authorization to receive software or technology controlled under these U.S. export control laws and regulations without sponsorship for an export license.

Benefits

Salary Range: per year 135000-170000
100% company-paid medical, dental, vision, short/long-term disability
Employer-funded Health Savings Account
Unlimited PTO
401(k) match
Company-paid Life and AD&D Insurance
Flexible Savings Account
Paid FMLA, Maternity/Paternity Leave
Employee Assistance Program
Student Loan Repayment
Equity Program

Notice to Recruitment Agencies:

Infleqtion does not accept unsolicited resumes from agencies. Infleqtion is not responsible for any fees related to unsolicited resumes.

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Skills

Research
C
Firmware
Debugging
Develop models
Packaging
Communication skills
Leadership

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