Modeling Simulation Engineer

Job not on LinkedIn

🔥 22 hours ago

🇺🇸 United States – Remote

⏱ Part Time

🟠 Senior

🔴 Lead

👷🏻‍♀️ Engineer

👻 Ghost score 10%

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Salas O'Brien

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

💼 Consulting

🏗️ Construction

🏥 Healthcare

Consulting • Construction • Healthcare

Salas O'Brien is a multidisciplinary engineering and design firm delivering MEP, structural, civil, energy and resiliency, process engineering, digital automation, and sustainability and forensic consulting for buildings, industrial facilities, and infrastructure. The firm specializes in advanced energy and renewables, decarbonization strategy, microgrids, energy optimization, and integrated facility design and commissioning, serving institutional, healthcare, education, data center, aerospace, and manufacturing clients. Salas O'Brien focuses on sustainable, resilient solutions and technical project delivery for other organizations and public-sector partners.

📋 Description

• Provide senior technical analysis in radiation transport, shielding analysis, and nuclear modeling and simulation • Support shielding optimization for a high-energy X-ray inspection facility using an electron linear accelerator (LINAC) • Develop conservative bounding analyses from incomplete design information • Refine computational models as equipment and facility data mature • Recommend practical shielding configurations that meet radiation-protection objectives while reducing concrete volume, footprint, and cost • Work with architects, engineers, radiation-protection specialists, clients, and regulatory stakeholders to define data needs and evaluate alternatives • Document assumptions and uncertainties and translate technical results into defensible design recommendations • Lead or support advanced radiation transport, shielding, and dose analyses for accelerator, X-ray, nuclear facility, and other complex radiological applications • Serve as a recognized technical expert on complex modeling, shielding, and radiation-protection challenges • Construct, execute, review, and document Monte Carlo radiation transport models • Evaluate photon, electron, and neutron transport, including secondary particle production and activation where applicable • Assess LINAC beam energy, current or power, duty cycle, workload, beam orientation, target characteristics, leakage, scatter, operating modes, and credible bounding conditions • Evaluate primary and secondary barriers, roofs, mazes, doors, joints, ducts, cable penetrations, and other streaming paths • Compare conventional concrete, high-density concrete, steel, and layered or advanced shielding systems • Plan and execute shielding trade studies, sensitivity studies, and uncertainty analyses • Apply verification, validation, peer-review, and quality-assurance practices to models, input data, calculations, and reported results • Define client and vendor inputs and identify data gaps • Coordinate with architectural, structural, mechanical, electrical, systems, safety, and radiation-protection personnel • Prepare calculation packages, technical memoranda, reports, presentations, and review responses for clients, independent reviewers, qualified experts, and regulatory authorities

🎯 Requirements

• Bachelor's degree, or equivalent, in nuclear engineering, physics, health physics, engineering, mathematics, or a related technical discipline with 12 to 15 years of relevant experience; or a master's degree with 10 to 13 years of relevant experience • Recognized expertise in radiation transport, radiation shielding, nuclear modeling and simulation, health physics, nuclear engineering, or a closely related technical area • Demonstrated experience developing, applying, or independently reviewing models using MCNP, MCNPX, MCNP6, or another comparable Monte Carlo radiation transport code • Experience producing or reviewing defensible shielding, dose, or radiation-transport calculations for accelerators, radiation-generating equipment, nuclear facilities, or comparable complex radiological systems • Working knowledge of photon, electron, and neutron transport; source-term development; material definitions; attenuation and scattering; radiation streaming; and dose assessment • Ability to independently define objectives, select appropriate analytical methods, establish conservative assumptions, and solve complex problems when information is incomplete or evolving • Experience with model verification and validation, sensitivity or uncertainty analysis, technical peer review, and documentation of model limitations and design margin • Strong technical writing, presentation, and collaboration skills • Preferred: Advanced degree in nuclear engineering, physics, health physics, or a closely related discipline • Preferred: Direct experience with high-energy electron LINACs, industrial radiography, accelerator shielding, or X-ray inspection facility design • Preferred: Experience optimizing shielding systems using concrete, high-density concrete, steel, layered barriers, penetrations, or other space-efficient shielding materials and configurations • Preferred: Familiarity with applicable NCRP, ANSI/HPS, DOE, and state radiation-protection guidance; experience supporting national laboratories, DOE/NNSA programs, national security missions, or regulatory design reviews

🏖️ Benefits

• Part-time employment • Reasonable disability accommodations for applicants • Equal employment opportunity and anti-discrimination protections