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Energy and Environment Directorate

Carmen Cejudo Marmolejo

Carmen Cejudo Marmolejo

(206) 528-3125


Carmen Cejudo, PE, joined BCS this week as a Buildings Energy/Water Efficiency Research Engineer 3. She graduated from the University of Southern California with a BS in Environmental Engineering. She is a licensed Mechanical Engineer with 12+ years’ experience designing and delivering energy and water efficient HVAC, Plumbing, and Fire Protection systems for a variety of building types ranging from Office, Retail, Multifamily, Laboratories and even an Aquarium. Carmen is passionate about sustainable building practices with a specific emphasis on the interconnection between energy and water use in the built environment. When not at work, she enjoys reading, gardening, cooking, hiking, and sewing face coverings for friends and family. Carmen will be based in the Seattle office.

Research Interests

  • Energy Modeling and Efficiency Analysis
  • Codes and Standards Development
  • HVAC Performance Optimization
  • Domestic Hot Water Generation and Delivery
  • Net-Zero Water and Alternative Water/Wastewater Systems
  • Water Resource Management and Strategic Planning

Education and Credentials

  • BS Environmental Engineering, University of Southern California
  • Mechanical Professional Engineer (PE), Washington State
  • Mechanical Professional Engineer (PE), Oregon State
  • LEED Accredited Professional (LEED AP BD+C), USGBC
  • Building Commissioning Practitioner (BCxP), ASHRAE

Affiliations and Professional Service

  • President Puget Sound Chapter 2018-2019; Member, ASHRAE, 2011 to Current
  • Member, American Society of Plumbing Engineers (ASPE), 2012 to Current
  • Member, International Association of Plumbing and Mechanical Officials (IAPMO), 2012 to Current
  • Member, National Fire Protection Association (NFPA), 2016 to Current
  • President Puget Sound Professionals Chapter 2010-2013; Member, Engineers Without Borders (EWB USA), 2008 to Current

PNNL Publications



  • Hart R., J. McNeill, M.M. Tillou, C. Cejudo, C. Chandrasekharan Nambiar, H. Nagda, and D.E. Maddox, et al. 2021. Expanded Energy Credits in Energy Codes: Technical Brief. PNNL-31572. Richland, WA: Pacific Northwest National Laboratory. Expanded Energy Credits in Energy Codes: Technical Brief

Energy and Environment

Core Research Areas