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Sr. Project Engineer
Parsons Technical Services, Inc.
NJ
…(Pavement/Materials) to join our team! In this role you will get to lead the empirical evaluation, modeling, and optimization of runway materials systems and experimental pavement designs…
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Vice President – Senior Program Director / DC Operations Manager
Parsons Transportation Group
WA
Parsons is looking for a talented executive to be our DC Office Operations Manager supporting Transportation Engineering. In this role you will get to lead the Transportation Engineering…
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Lead Verification Engineer
Astera Labs
San Jose, CA · CA
As a Technical Lead on Verification at Astera Labs, you will be responsible for verifying the firmware and microcontroller subsystems for Astera Labs’ SoC and system products. In this role,…
Added 2 mins ago
Project Executive - Mission Critical Construction
STO Building Group
Springfield, IL · Saint Louis, MO · Indianapolis, IN
Ajax Building Company, part of STO Building Group, is seeking a Mission Critical Project Executive to lead large-scale data center projects from preconstruction through commissioning and…
Added 2 mins ago
Traveling Senior Superintendent - Corrections
STO Building Group
Jacksonville, FL
…delivering exceptional projects. As Superintendent, you will lead day-to-day field operations, manage craft and subcontractor teams, and ensure projects are delivered safely, on schedule,…
Added 2 mins ago
Project Executive - Mission Critical Construction
STO Building Group
Saint Louis, MO
Ajax Building Company, part of STO Building Group, is seeking a Mission Critical Project Executive to lead large-scale data center projects from preconstruction through commissioning and…
Added 2 mins ago
Preconstruction Manager
STO Building Group
Tallahassee, FL
Serve as the strategic lead during preconstruction - guiding pricing, validating estimates, and ensuring alignment with project goals
Added 2 mins ago
Traveling Senior Superintendent - Corrections
STO Building Group
Tampa, FL
…delivering exceptional projects. As Superintendent, you will lead day-to-day field operations, manage craft and subcontractor teams, and ensure projects are delivered safely, on schedule,…
Added 2 mins ago
Preconstruction Manager
STO Building Group
Gainesville, FL
Serve as the strategic lead during preconstruction - guiding pricing, validating estimates, and ensuring alignment with project goals
Added 2 mins ago
Senior Project Manager - K-12 Construction
STO Building Group
Atlanta, GA
Ajax Building Company, part of the STO Building Group, is seeking a driven Senior Project Manager to lead the planning and execution of complex construction projects from preconstruction…
Added 3 mins ago
Dimensional Inspection Planner & Foreman / Senior Dimensional Inspection Planner & Foreman - Active Clearance Required
LLNL
Livermore, CA
We have an opening for a Planner & Foreman / Senior Planner & Foreman in Dimensional Inspection to join the 321 Complex within the Manufacturing Engineering Section of the Material…
Added 3 mins ago
Laboratory Vacuum Equipment Technologist / Sr. Technologist
LLNL
Livermore, CA
…is in the the Vacuum Processes Laboratory within Materials Engineering Division (MED) in the Engineering…
Added 3 mins ago
Senior Construction Manager
KEITH
Belle Glade, FL
Lead construction progress meetings and coordinate resolution of project issues.
Added 3 mins ago
Senior Collaboration Architect
LiveRamp, Inc.
New York, NY
If you are energized by complex, high-stakes program builds, thrive at the intersection of technical depth, operating model, and commercial strategy, and take genuine satisfaction in…
Added 3 mins ago
Sr. Collaboration Architect
LiveRamp, Inc.
New York, NY
If you are energized by complex, high-stakes program builds, thrive at the intersection of technical depth, operating model, and commercial strategy, and take genuine satisfaction in…
Added 3 mins ago
WP
Environmental Permitting, Lead
WESTWOOD PROFESSIONAL SERVICES INC
West Henrietta, NY
- $105,000 to $160,000 USD / year
The Environmental Permitting Lead serves as a technical lead and project manager for environmental permitting and compliance activities supporting electric transmission, distribution,…
Added 3 mins ago
WP
Environmental Permitting, Lead
WESTWOOD PROFESSIONAL SERVICES INC
Midlothian, VA
- $105,000 to $160,000 USD / year
The Environmental Permitting Lead serves as a technical lead and project manager for environmental permitting and compliance activities supporting electric transmission, distribution,…
Added 4 mins ago
A
Construction Engineer V
AECOM
Houston, TX
- $145,000 to $165,000 USD / year
The Construction Engineer V is a senior, licensed engineer who leads Construction Engineering and Inspection (CEI) on transportation projects for public owners such as TxDOT, toll…
Added 4 mins ago
Highway Construction Inspector IV
AECOM
Houston, TX
The Inspector IV is a Senior Field Inspector on Construction Engineering and Inspection (CEI) teams for transportation projects. Clients are public owners such as state DOTs, toll…
Added 4 mins ago
Construction Assistant Project Manager - Solar
Mortenson
Minneapolis, MN
Lead project buyout with subcontractors and trade partners
Added 4 mins ago
U
Vice President, Strategic Partnerships
Upgrade
Remote, United States
- $250,000 to $275,000 USD / year
In this role, you will lead the development of strategic white-label partnerships with financial institutions, fintechs, and major consumer-facing brands, enabling them to offer personal…
Added 5 mins ago
CAPEX Project Manager
GKN Aerospace Careers
Garden Grove, CA
The CAPEX Project Manager is responsible for leading and executing large, complex capital investment projects for the Garden Grove site. This role manages projects from initial concept and…
Added 6 mins ago
Senior Environmental Project Manager
ARM Group LLC
Canonsburg, PA
Lead proposal preparation efforts in response to RFPs with complex multidisciplinary work scopes.
Added 6 mins ago
Senior Automation Controls Engineer
ARM EnerTech Associates, LLC
Mechanicsburg, PA
Strong organizational and project management skills with the ability to manage multiple complex projects.
Added 6 mins ago
Senior Project Planner
Hitachi Rail GTS USA LLC.
NY
The Senior Project Scheduler / Planner will be responsible for developing, maintaining, and managing complex project schedules supporting infrastructure and transit projects, in New York…

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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More about this job

Skills

Research
C
Firmware
Debugging
Develop models
Packaging
Communication skills
Leadership

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