June 10, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Experience developing and executing physics-based simulations using tools such as MCNP, SCALE, ORIGEN, COMSOL, and related modeling software, supplemented by data analysis tools such as Python, MATLAB, or C++.
Rockville, MD30+ days ago
li>A masters degree in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of two years of experience. D. in engineering or related field (may include a combination of experience obtained through an academic institution, e.g., design projects, research, or design teams, as well as professional experience) may be in lieu of three years of experience.
Our staff collaborates with Kiewit's vast internal network of resources that span heavy civil and infrastructure, vertical and commercial buildings, industrial, as well our oil and gas and power generation markets, to drive safe and cost-effective solutions that achieve client expectations and further Kiewit's core values of People, Integrity, Excellence, and Stewardship. We offer our fulltime staff employees a comprehensive benefits package that's among the best in our industry, including top-tier medical, dental and vision plans covering eligible employees and dependents, voluntary wellness and employee assistance programs, life insurance, disability, retirement plans with matching, and generous paid time off.
p>The successful candidate will lead technical assessments of foreign nuclear weapons infrastructure, reverse engineer protective hardening measures, and identify vulnerabilities across facilities, processes, and supply chains. Leidos' Analysis Solutions business area is seeking a highly accomplished Principal Nuclear Engineer Subject Matter Expert (SME) to support critical national security missions in Reston, Virginia.
Alexandria, VA30+ days ago
li>Oversee MPR engineers performing neutronics simulations and core design: criticality safety evaluations, critical core configurations, fuel cycle management, activation calculations, radiation detection and shielding analyses: alarm setpoint determination, shielding optimization, ALARA implementation, dosimetry calculations. The role requires deep expertise in or an ability to quickly master several nuclear engineering related topics, including neutronics, thermal hydraulics, shielding, fuel and nuclear materials, and radiological consequence evaluation combined with strong communication skills, adherence to best practices, and an eye for growing MPR''s portfolio.
Reston, Virginia18 days ago
June 10, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
The successful candidate will lead technical assessments of foreign nuclear weapons infrastructure, reverse engineer protective hardening measures, and identify vulnerabilities across facilities, processes, and supply chains.
Rockville, MD30+ days ago
Support for engagements with the US Nuclear Regulatory Commission (NRC) includes pre-application meetings, preparing and reviewing permit and license applications, preparing and reviewing topical reports, and responding to NRC audit questions and requests for additional information. TerraPower is seeking to hire highly motivated and forward-thinking professionals who are interested in focusing on advanced nuclear reactor research and development and influencing change within the nuclear power landscape and bringing forward the critical production of medical isotopes.
Gaithersburg, MD30+ days ago
Communicates client interests and drivers to project team members and develops approaches to accommodate these concerns in the performance of the work on low to moderately complex projects. All applicants must be able to complete pre-employment onboarding requirements (if selected) which may include any/all of the following: criminal/civil background check, drug screen, and motor vehicle records search, in compliance with any applicable laws and regulations.
p>As the Senior Nuclear Surety Systems Engineer, you will: Serve as the Lab's focal point and thought leader for nuclear surety engineering with emphasis on leveraging and implementing systems engineering principles to enhance strategic systems nuclear surety design and modifications.
Are you interested in applying technical leadership, innovation, system engineering skills, and specialty nuclear surety expertise toward the difficult critical challenges of ensuring the safety and security of this nation's most critical defense systems?
Laurel, Maryland30+ days ago
ul>Serve as the Lab’s focal point and thought leader for nuclear surety engineering with emphasis on leveraging and implementing systems engineering principles to enhance strategic systems nuclear surety design and modifications. Description: Are you interested in applying technical leadership, innovation, system engineering skills, and specialty nuclear surety expertise toward the difficult critical challenges of ensuring the safety and security of this nation’s most critical defense systems? .
Additional skills/expereince required: + 6 years of experience supporting projects of varying size and scope + 2 years of DoD Acquisition program or Pentagon experience and a warfare qualified officer + Self-starter who can work with minimal supervision, knowledgeable with project management methodologies and frameworks such as waterfall and agile + Strong ability to analyze data, interpret trends, and draw meaningful conclusions. **Preferred Education, Experience, & Skills** + Submarine Officer with preference for SSBN experience + Nuclear Qualified officer + PMP, CAPM certification + Knowledge/Experience supporting Navy SSP Strategic Weapons System **Pay Information** Full-Time Salary Range: $130355 - $221603 Please note: This range is based on our market pay structures.
li>Specified academic courses -- Successful completion of at least 60 semester hours of courses in the physical, mathematical, and engineering sciences and that included the courses specified in the basic requirements under paragraph A. The courses must be fully acceptable toward meeting the requirements of an engineering program as described in paragraph A.
Related curriculum -- Successful completion of a curriculum leading to a bachelors degree in an appropriate scientific field, e.g., engineering technology, physics, chemistry, architecture, computer science, mathematics, hydrology, or geology, may be accepted in lieu of a bachelors degree in engineering, provided the applicant has had at least 1 year of professional engineering experience acquired under professional engineering supervision and guidance.
PLEASE REVIEW THE BELOW LINK FOR OTHER SUPPORTING DOCUMENTS needed for proof of eligibility:
https://www.dla.mil/Portals/104/Documents/Careers/downloads/DODCustomersRequiredSupportingDocumentation.pdf?.
li>Specified academic courses -- Successful completion of at least 60 semester hours of courses in the physical, mathematical, and engineering sciences and that included the courses specified in the basic requirements under paragraph A. The courses must be fully acceptable toward meeting the requirements of an engineering program as described in paragraph A.
Related curriculum -- Successful completion of a curriculum leading to a bachelors degree in an appropriate scientific field, e.g., engineering technology, physics, chemistry, architecture, computer science, mathematics, hydrology, or geology, may be accepted in lieu of a bachelors degree in engineering, provided the applicant has had at least 1 year of professional engineering experience acquired under professional engineering supervision and guidance.
To apply for this position, you MUST provide a complete application package which includes:
- Your two (2) pageRESUME showing all relevant work experience (paid and unpaid) including: duties performed; full name and address of the each employer; start and end dates (month/day/year); work schedule (part-time, full-time, number of hours if intermittent); salary; and any completed education and training (program title, subject area, number of hours completed, and completion date).
data-css="[data-component="cookie-banner"] { --a-cookieBannerWidget-wrapper-color: #0000004D; --a-cookieBannerWidget-text-font-weight: 400; --a-cookieBannerWidget-text-text-decoration: none; --a-cookieBannerWidget-link-text-decoration: underline; --a-cookieBannerWidget-label-font-weight: 600; --a-cookieBannerWidget-label-text-decoration: none; --a-cookieBannerWidget-divider-border-style: solid; --a-cookieBannerWidget-text-margin-top: 0px; --a-cookieBannerWidget-text-margin-right: 0px; --a-cookieBannerWidget-text-margin-bottom: 0px; --a-cookieBannerWidget-text-margin-left: 0px; --a-cookieBannerWidget-text-padding-top: 0px; --a-cookieBannerWidget-text-padding-right: 0px; --a-cookieBannerWidget-text-padding-bottom: 0px; --a-cookieBannerWidget-text-padding-left: 0px; --a-cookieBannerWidget-divider-margin-top: 24px; --a-cookieBannerWidget-divider-margin-right: 0px; --a-cookieBannerWidget-divider-margin-bottom: 24px; --a-cookieBannerWidget-divider-margin-left: 0px; --a-cookieBannerWidget-divider-border-width: 1px; }">. Orano's activities in the U.S. include developing uranium enrichment facility in Oak Ridge, TN ; packages and transportation of uranium & nuclear fuel assemblies ; fabricating & installing used nuclear fuel dry storage canisters and casks, conducting pool-to-pad used nuclear fuel transfers ; providing solutions to the National Labs and to the Dept of Energy ; and supplying U.S. nuclear energy utilities with uranium, conversion, and enrichment services.
Through its design-once, build-many approach and coalition building across communities, regulators, and financial stakeholders, The Nuclear Company is committed to delivering safe and reliable electricity at the lowest cost, while catalyzing the nuclear industry toward rapid development in America and globally. The actual salary offered may vary based on relevant factors as determined in the Company's discretion, which may include experience, qualifications, tenure, skill set, availability of qualified candidates, geographic location, certifications held, and other criteria deemed pertinent to the particular role.
Washington, DC11 days ago
Through its design-once, build-many approach and coalition building across communities, regulators, and financial stakeholders, The Nuclear Company is committed to delivering safe and reliable electricity at the lowest cost, while catalyzing the nuclear industry toward rapid development in America and globally. This is a high-ownership role for a builder who is equally comfortable reviewing application architecture, threat modeling an API, improving GitHub security controls, and partnering directly with engineers to ship secure software quickly.
Washington, DC11 days ago
p>This is a high-ownership role for a hands-on security builder who is equally comfortable designing AWS account architecture, reviewing Terraform, hardening VPC and transit-network patterns, building IAM guardrails, debugging cloud logs, and partnering directly with engineers to ship secure infrastructure quickly. The Nuclear Company is searching for a Cloud Security Engineer to help secure the AWS cloud infrastructure, network architecture, identity systems, and deployment platforms that power our Nuclear Operating System, internal engineering platforms, data environments, and mission-critical business systems.
p>FOREIGN EDUCATION: Applicants who have completed part or all of their education outside of the U.S. must have their foreign education evaluated by an accredited organization to ensure that the foreign education is comparable to education received in accredited educational institutions in the U.S. A written evaluation of any foreign education must be provided with your application in response to this vacancy announcement or be received by the closing date of this announcement. Certain Military Spouses: Permanent Change of Station (PCS) orders authorizing you to accompany the Military member to the new duty permanent station; OR verification of the members 100% disability (VA Letter); and/or verification of the members death while on active duty (DD-1300 and Death Certificate) AND verification of the marriage to the service member (i.e., a marriage license or other legal documentation verifying marriage).
li>Specified academic courses -- Successful completion of at least 60 semester hours of courses in the physical, mathematical, and engineering sciences and that included the courses specified in the basic requirements under paragraph A. The courses must be fully acceptable toward meeting the requirements of an engineering program as described in paragraph A. Related curriculum -- Successful completion of a curriculum leading to a bachelors degree in an appropriate scientific field, e.g., engineering technology, physics, chemistry, architecture, computer science, mathematics, hydrology, or geology, may be accepted in lieu of a bachelors degree in engineering, provided the applicant has had at least 1 year of professional engineering experience acquired under professional engineering supervision and guidance. Specialized experience is: - Participating in technical evaluations of operational performance, including evaluations of supporting technical documentation, in a high-hazard facility (i.e., hazards with potential consequences affecting a large number of onsite or offsite personnel);
- Assisting in preparing portions of technical reports, briefing materials or other documentation detailing performance relative to safe and efficient operations or documenting operational incidents, accidents, malfunctions or non-routine operations; and.
p>1301- Degree: physical science, engineering, or mathematics that included 24 semester hours in physical science and/or related engineering science such as mechanics, dynamics, properties of materials, and electronics OR Combination of education and experience -- education equivalent to one of the majors shown in A above that included at least 24 semester hours in physical science and/or related engineering science, plus appropriate experience or additional education. Certain Military Spouses: Permanent Change of Station (PCS) orders authorizing you to accompany the Military member to the new duty permanent station; OR verification of the members 100% disability (VA Letter); and/or verification of the members death while on active duty (DD-1300 and Death Certificate) AND verification of the marriage to the service member (i.e., a marriage license or other legal documentation verifying marriage).
li>Specified academic courses -- Successful completion of at least 60 semester hours of courses in the physical, mathematical, and engineering sciences and that included the courses specified in the basic requirements under paragraph A. The courses must be fully acceptable toward meeting the requirements of an engineering program as described in paragraph A. Related curriculum -- Successful completion of a curriculum leading to a bachelors degree in an appropriate scientific field, e.g., engineering technology, physics, chemistry, architecture, computer science, mathematics, hydrology, or geology, may be accepted in lieu of a bachelors degree in engineering, provided the applicant has had at least 1 year of professional engineering experience acquired under professional engineering supervision and guidance. To apply for this position, you MUST provide a complete application package which includes:
- Your RESUME showing all relevant work experience (paid and unpaid) including: duties performed; full name and address of the each employer; start and end dates (month/day/year); work schedule (part-time, full-time, number of hours if intermittent); salary; and any completed education and training (program title, subject area, number of hours completed, and completion date).
Rockville, MD30+ days ago
This position will lead the execution of core architectural tasks without close supervision, provide guidance to more junior team members, and contribute to the coordination of multiple workstreams within an assigned technical area to ensure timely, high-quality design delivery. The Architect IV will collaborate with a multi-disciplined team of engineers, suppliers, construction contractors, and other project stakeholders, and will support key objectives in deploying the Xe-100 plant that has advantages in safety, reliability, economics, and sustainability relative to current-day power generation units.
Washington, DC30+ days ago
Act as Senior Technical Representative and Program Manager in the planning, direction and success of major projects, systems development efforts, and research or technology initiatives which have great significance to NUWC' Autonomous Maritime Systems Test Center (AMSTC). You will be leading a team that works closely with the customer to deliver management, engineering, acquisition, and logistics support required to conduct system upgrades, maintenance, and sustainment in support of autonomous underwater vehicles.
Washington, DC20 days ago
Through its design-once, build-many approach and coalition building across communities, regulators, and financial stakeholders, The Nuclear Company is committed to delivering safe and reliable electricity at the lowest cost, while catalyzing the nuclear industry toward rapid development in America and globally. The actual salary offered may vary based on relevant factors as determined in the Company's discretion, which may include experience, qualifications, tenure, skill set, availability of qualified candidates, geographic location, certifications held, and other criteria deemed pertinent to the particular role.