Monte Carlo Codes Postdoctoral Research Associate
Listed on 2026-09-09
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Research/Development
Research Scientist, Data Scientist
What You Will Do
The Monte Carlo Codes Group (XCP-3, https://(Use the "Apply for this Job" box below).) at Los Alamos National Laboratory is seeking an early career postdoctoral researcher to join our world-class team! The successful applicant will gain experience in Monte Carlo particle transport methods and code development with one of the world's foremost Monte Carlo particle transport teams.
XCP-3 provides the Monte Carlo particle transport capability needed to accurately predict the interaction of radiation with matter. Our predictive capability is the world's foremost predictive tool for nuclear criticality safety simulations and plays a central role in many fields including nuclear energy, nuclear medicine, radiation detection, and radiation safety. The successful applicant will perform research and development to improve modeling and simulation capabilities in areas that support the national-security programs and mission of the Laboratory.
WhatYou Will Do
The Monte Carlo Codes Group (XCP-3, https://) at Los Alamos National Laboratory is seeking an early career postdoctoral researcher to join our world-class team! The successful applicant will gain experience in Monte Carlo particle transport methods and code development with one of the world's foremost Monte Carlo particle transport teams.
XCP-3 provides the Monte Carlo particle transport capability needed to accurately predict the interaction of radiation with matter. Our predictive capability is the world's foremost predictive tool for nuclear criticality safety simulations and plays a central role in many fields including nuclear energy, nuclear medicine, radiation detection, and radiation safety. The successful applicant will perform research and development to improve modeling and simulation capabilities in areas that support the national-security programs and mission of the Laboratory.
WhatYou Will Do What You Will Do What You Will Do
XCP-3 provides the Monte Carlo particle transport capability needed to accurately predict the interaction of radiation with matter. Our predictive capability is the world's foremost predictive tool for nuclear criticality safety simulations and plays a central role in many fields including nuclear energy, nuclear medicine, radiation detection, and radiation safety. The successful applicant will perform research and development to improve modeling and simulation capabilities in areas that support the national-security programs and mission of the Laboratory.
XCP-3 develops the widely used Monte Carlo N-Particle® (MCNP®) code () and the Monte Carlo Application Toolkit (MCATK) and associated capabilities. Our work supports a variety of Laboratory missions, including stockpile stewardship, nonproliferation, threat reduction, and energy and environmental sciences. We deliver technology, methods, production quality codes, and training to sponsors, primarily U.S. federal agencies, through research, development, and maintenance of high-quality software and documentation.
We are seeking a highly motivated Postdoctoral Research Associate to contribute to the modernization of electron transport capabilities in the MCNP code. The successful candidate will support the development of advanced Monte Carlo transport methods and the integration of modern scientific software practices. Responsibilities include developing and maintaining high-performance scientific software in Fortran, C/C++, and Python; conducting verification and validation (V&V) studies for electron transport and coupled multi-particle transport physics;
performing software testing, benchmarking, and documentation; and supporting modern software engineering workflows, including version control and continuous integration.
The candidate will work collaboratively with researchers who have expertise in computational physics, particle transport, and nuclear engineering to improve the accuracy, robustness, and maintainability of next‑generation electron transport capabilities in the MCNP code. This position will also provide opportunities to present research at professional conferences, publish…
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