What are the responsibilities and job description for the Criticality Safety Engineer position at Idaho National Laboratory?
Idaho National Laboratory is hiring a Criticality Safety Engineer to work in our Criticality Safety Department. Our team works a 9x80 schedule located out of our Idaho Falls, Idaho facility with every other Friday off.
Apply nuclear physics, ANSI/ANS-8 series industry standards, unique computer codes, and state-of-the-art neutron cross section data to derive administrative and engineered controls for the prevention of an inadvertent nuclear chain reaction. Interface with facility operations staff to develop criticality safety controls specific to the facility and operation. Determines safe parameters for safe handling, processing, and storage for the various forms of fissionable materials. This position is part of the INL Nuclear Nexus.
Responsibilities Include
INL is a science-based, applied engineering national laboratory dedicated to supporting the U.S. Department of Energy’s mission in nuclear energy research, science, and national defense. With more than 6,300 scientists, researchers, and support staff, the laboratory works with national and international governments, universities and industry partners to change the world’s energy future and secure our nation’s critical infrastructure.
INL Mission
Our mission is to discover, demonstrate and secure innovative nuclear energy solutions, other clean energy options and critical infrastructure.
INL Vision
Our vision is to change the world’s energy future and secure our nation’s critical infrastructure.
Selective Service Requirements
To be eligible for employment at INL males born after December 31, 1959 must have registered with the Selective Service System (SSS). For more information see www.sss.gov.
Equal Employment Opportunity
Idaho National Laboratory (INL) is an Equal Employment Opportunity (EEO) employer. It is the policy of INL to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information.
Reasonable Accommodation
We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.
Other Information
When applying to positions please provide a resume and answer all questions on the following screens. Applicants, who fail to provide a resume or answer the questions, may be deemed ineligible for consideration.
INL does not accept resumes from third party vendors unsolicited.
Primary Location
US-ID-Idaho Falls
Job
Engineering
Organization
Environment, Safety, Health & Quality (Hxxx)
Schedule
Full-time
Employee Status
Regular
Job Posting
Dec 22, 2025, 4:19:11 PM
Unposting Date
Jan 20, 2026, 1:59:00 AM
RELOCATION
Position Relocation Eligible
TELEWORK
On-Site Worker
Apply nuclear physics, ANSI/ANS-8 series industry standards, unique computer codes, and state-of-the-art neutron cross section data to derive administrative and engineered controls for the prevention of an inadvertent nuclear chain reaction. Interface with facility operations staff to develop criticality safety controls specific to the facility and operation. Determines safe parameters for safe handling, processing, and storage for the various forms of fissionable materials. This position is part of the INL Nuclear Nexus.
Responsibilities Include
- Perform criticality safety reviews or assessments of existing and proposed facility safety bases, engineering studies, research plans, facility procedures, operating nuclear facilities, proposed new facility designs, and existing facility modifications.
- Perform criticality safety evaluations that meet DOE-STD-3007 requirements.
- Apply Conduct of Operations principles in assisting nuclear safety and operations in Safety Basis Implementation Reviews and in conducting training for operations personnel.
- Perform independent checks of other engineers' computer models and written criticality safety evaluations.
- Collaborate with project managers, operators, nuclear safety, and criticality safety officers in discussing progress, input assumptions, and proposed controls.
- Perform software and hardware installation, testing, records, and maintenance activities in accordance with the Software Quality Assurance plan.
- May act as an organizational point of contact for multiple nuclear facilities on criticality safety issues, particularly criticality safety dose calculations for operations, engineering, environmental safety and health, and project personnel.
- May perform duties as the System Administrator for the Criticality Safety computational cluster.
- Perform software quality assurance activities to maintain software configuration management.
- Support nuclear safety using DOE STD-3009 to create new or update existing Documented Safety Analyses (DSA).
- Work with and/or lead team evaluations that support safe, cost-effective, and compliant solutions.
- Other duties as assigned.
- Level 1: Bachelor of Science Degree in Nuclear Engineering or other relevant engineering degree (Physics, Mechanical, Chemical).
- Level 2: Bachelor of Science Degree in Nuclear Engineering or other relevant engineering degree and (2) years of related experience or a Masters Degree in Nuclear Engineering or other relevant engineering degree.
- Must complete criticality safety engineer qualification, upon hire.
- This position requires the ability to obtain and maintain a Department of Energy "Q" clearance, which requires US Citizenship.
- Experience with MCNP or SCALE computer codes.
- Experience with LINUX-based operating environment.
- While performing the duties of this classification, the employee is frequently required to stand, walk, sit, stoop, kneel, bend, and work in an office and laboratory environment. The job requires hand/finger dexterity to keyboard or type, handle materials, manipulate tools, and reach with hands and arms. The job requires operation of job-related equipment and driving a vehicle. The employee must occasionally lift and/or move up to 50 pounds. Sufficient visual acuity and hearing capacity to perform the essential functions and interact with the public is required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.
- The pay range for this position is: Level 1 ($ 65,064 - $133,416)/ Level 2 ($77,628 - $159,228).
- At Idaho National Laboratory compensation decisions are determined using factors such as education, relevant experience, and other credentials.
- TDP: This is a testing designated position; you will be required to submit to a pre-employment drug screen and periodic drug testing throughout the term of your employment.
- Multi-Level: This is a multi-level posting and you will be placed at the appropriate level dependent on depth and breadth of proven experience and skills.
- Medical, Dental, Vision, and Flexible Spending Accounts
- 401(k) with a 4.2% employer contribution and up to 4.8% match
- Paid time off (personal leave)
- Employee Education Program (tuition assistance)
- Comprehensive Relocation Package
- Benefit eligibility subject multiple factors, including employment status and position classification.
INL is a science-based, applied engineering national laboratory dedicated to supporting the U.S. Department of Energy’s mission in nuclear energy research, science, and national defense. With more than 6,300 scientists, researchers, and support staff, the laboratory works with national and international governments, universities and industry partners to change the world’s energy future and secure our nation’s critical infrastructure.
INL Mission
Our mission is to discover, demonstrate and secure innovative nuclear energy solutions, other clean energy options and critical infrastructure.
INL Vision
Our vision is to change the world’s energy future and secure our nation’s critical infrastructure.
Selective Service Requirements
To be eligible for employment at INL males born after December 31, 1959 must have registered with the Selective Service System (SSS). For more information see www.sss.gov.
Equal Employment Opportunity
Idaho National Laboratory (INL) is an Equal Employment Opportunity (EEO) employer. It is the policy of INL to provide equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran or disabled status, or genetic information.
Reasonable Accommodation
We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.
Other Information
When applying to positions please provide a resume and answer all questions on the following screens. Applicants, who fail to provide a resume or answer the questions, may be deemed ineligible for consideration.
INL does not accept resumes from third party vendors unsolicited.
Primary Location
US-ID-Idaho Falls
Job
Engineering
Organization
Environment, Safety, Health & Quality (Hxxx)
Schedule
Full-time
Employee Status
Regular
Job Posting
Dec 22, 2025, 4:19:11 PM
Unposting Date
Jan 20, 2026, 1:59:00 AM
RELOCATION
Position Relocation Eligible
TELEWORK
On-Site Worker
Salary : $65,064 - $159,228