Numark Associates Inc.

William Krotiuk Senior Executive Consultant


  • Engineer Degree (Mechanical Engineering), Polytechnic University
  • Master of Science in Nuclear Engineering, Columbia University
  • Bachelor of Science in Mechanical Engineering, Polytechnic University

Areas of Specialization/Experience

  • Management of engineering studies and testing activities 
  • Fluid-thermal computer code development, analysis and assessment 
  • PWR, BWR, advanced reactor and nuclear test facility thermal-hydraulic computer modeling, analysis and assessment 
  • Fluid-thermal analysis studies and testing activities for nuclear power plants
  • Fluid-thermal spacecraft system and component design, analysis and testing
  • Thermal-hydraulic assessment, testing and analysis for space-based reduced gravity systems 
  • Dry and pressure-suppression containment design and analysis for nuclear power plants
  • Fossil power plant thermal-hydraulic analysis and testing 

Previous Positions

  • U. S. Nuclear Regulatory Commission:
    • Senior Reactor Systems Engineer, Office of Nuclear Regulatory Research 
  • Dynatherm Corporation Inc.:
    • Senior Technology Manager 
  • Lockheed Martin Communications & Power Center:
    • Staff Engineer, Communications Products 
  • Lockheed Martin Astro Space:
    • Staff Engineer, Lead Spacecraft Fluid-Thermal Engineer 
  • Battelle, Pacific Northwest Laboratory:
    • Senior Research Engineer, Thermal-Hydraulic Lead USDOE Space Nuclear Power Program 
  • EBASCO Services Inc.:
    • Principal Engineer, Applied Physics Dept., Advanced Technology Division 
    • Supervisor, Thermal-Hydraulics Section 
    •  Group Technical Lead for PWR and BWR Power Plants
  • Combustion Engineering, Inc:
    •  R&D Project Engineer, Boiler Design and Performance Dept

Bottom Image - Management Team