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We are available to assist you in any facet of managing energy use and costs while maintaining and/or enhancing the environment. We are experienced with energy efficiency technologies, energy load management, on-site power generation and obtaining low-cost and reliable utility services.
JOHN KATRAKIS has 24 years experience in providing energy management services and to institutional, commercial, residential and industrial customers. Projects include: hospitals, K-12 schools, colleges & universities; office buildings; high rise and low-rise multifamily private and public housing; houses of worship; printing, metal finishing and food processing facilities. Applied technologies include energy efficiency improvements, distributed power generation, renewable energy systems and environment enhancement techniques. Services include providing energy studies, monitoring and evaluation, design, assistance during construction phases, and training on all aspects of facility energy management. As principal of J. T. Katrakis & Associates in Barrington, IL his clients include building owners and managers, Energy Service Companies (ESCOs), architectural and engineering firms, and local utilities and government agencies He has developed and directed research & development in building energy science and technology development while at the Center for Neighborhood Technology and has a Special Term Appointment at Argonne National Laboratory. He has published numerous technical articles and has presented at a number of workshops and seminars. He received a Bachelor Science in Engineering from the Illinois Institute of Technology and a Master of Science in Mechanical Engineering from the Massachusetts Institute of Technology specializing in fluid mechanics and heat transfer. John is a registered Professional Engineer in Illinois, an accredited LEED (Leadership in Energy and Environmental Design) professional and a member of the U.S. Green Building Council, ASHRAE, ASES and the City of Chicago Energy Code Committee that developed the City's first building energy code. He received a number of ASHRAE Energy Awards for building energy projects and his ASHRAE publications have earned him the ASHRAE Sam R. Lewis Education Award.
MARK RASMUSSEN has 15 years experience providing energy services to institutional, commercial, residential and industrial customers. Projects include: colleges & universities, office buildings, multi-family public housing, hospitals, industrial facilities, and LEED Clients. He is responsible for lighting system design and analysis, building energy modeling, developing and implementing treatments for electric motors and drives, installation and management of remote electrical metering and electricity demand management systems. Prior to his employment with J. T. Katrakis & Associates he provided similar services as Sole Proprietor of Energy Specialists in Plainfield, IL and as an employee of the Center for Neighborhood Technology. He received his Bachelor of Science in Electrical Engineering from the University of Illinois at Urbana/Champaign. He is a LEED Accredited Professional, Green Lights Certified, and a member of the Illuminating Engineers Society of North America.
DAVID LEHMAN After more than six years as Director of Engineering at his previous employer, David formed a new company in 1996. With this new venture, Lehman Design Consultants, Inc., his goal is to maintain his high standards in the mechanical and electrical design fields. David Lehman's professional career dates to 1979 and includes five years with H. S. Nachman and Associates and over twelve years with Gamze Korobkin Caloger, Inc. He has extensive experience with all types of Mechanical, Electrical, Plumbing and Fire Protection systems for a wide variety of single and mixed use projects. Projects include: university, offices, public institutions, health care facilities & hospitals, museums, apartments, restaurants, thermal storage systems, and cogeneration plants. David brings a nuts and bolts practical approach with sensitivity to architectural and owner program requirements. He is affiliated with American Society of Heating, Ventilation and Air Conditioning Engineers (ASHRAE), Building Officials and Code Administration (BOCA), American Consulting Engineers Council (ACEC), American Society of National Fire Protection Association (NFPA), Plumbing Engineers (ASPE), and Construction Specification Institute (CSI). He is a Registered Architect (RA) and Certified in Plumbing Engineering (CIPE). He received a Bachelor of Architecture in Structural Engineering from the University of Illinois in  Chicago.
MICHAEL CUSACK joined Lehman Design Consultants in 1998 as Project Engineer responsible for the design and of HVAC systems for a wide variety of commercial, institutional and industrial building projects. He previously did HVAC design for Holabird and Root and for Metro Design and for O'hare Engineering contractors. His design skills are augmented by his previous experience doing plant engineering management at Oakton College, facilities engineering management for Heitman Property Management and plant engineering management for manufacturing facilities. He received a Bachelor of Science in Mechanical Engineering from Valparaiso University and an Associates Degree in Business from Harper College. He is a registered Professional Engineer in Illinois, Florida, Ohio, Connecticut, Minnesota and is a member of the NCEE.
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