Refrigeration / Cooling Systems Engineering Consultants: 4

David G. Shreve, PE,  is a licensed Professional Engineer in 18 states. He holds a certification from the National Council of Examiners for Engineering and Surveying (NCEES), is a LEED® accredited professional for Building and Construction and holds a Certified in Plumbing Design (CPD) credential. 

Mr. Shreve has over 30 years of experience in design, construction administration and forensic analysis of Mechanical, Plumbing, Fire Protection, and HVAC /  Energy Management Systems for commercial, institutional and residential projects. He is also a member of American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), American Society of Plumbing Engineers (ASPE) and International Code Council (ICC).

Mr. Shreve joined Ivey Engineering in 2014. His primary responsibilities include forensic analysis of HVAC, plumbing, fire protection and energy management systems. Mr. Shreve and the team at IEI have designed and built HVAC systems for commercial, health care and LEED buildings; multi-family residential projects of all types; industrial and government facilities; hospitality projects; and detention facilities. 

EXPERIENCE (partial listing)
∗ Approximately 300 HVAC, fire protection and plumbing design projects
∗ Approximately 10 LEED® design projects
∗ Approximately 20 feasibility studies
∗ Approximately 125 expert witness engagements

Areas of Expertise:

View David Shreve's Expert Witness Profile.

John Hatcher is an industry leader in Building Systems Engineering including, Information Technology, Audio Visual, Security, Building Automation Systems, Fire Alarm Systems, Intelligent Building Concepts and Commissioning. He has worked on some of the most prestigious facilities in the world including the Americas, Europe, Middle East, Russia, India and Southeast Asia. 

Roger W. Griffith, PE, has over 37 years of professional experience as a Mechanical Engineer in the design, maintenance, and operation of mechanical systems. He specializes in the areas of Plumbing, HVAC, and Fire Sprinkler Systems Design.

Background - As the principal of Griffith Engineering & Consulting for 23 years, his design experience with commercial and industrial projects include convention centers, schools, office buildings, condominiums, apartment buildings, hotels, churches, manufacturing facilities, medical buildings, restaurants, historic buildings, dormitories, fire halls, and maintenance facilities. Prior to that, Mr. Griffith worked at the Tennessee Valley Authority (TVA) as a mechanical engineer for 14 years. 

His roles at TVA included nuclear piping analyst, valve and heat exchanger specialist, maintenance engineer, and later maintenance supervisor at a fossil plant, and quality manager. His engineering roles included failure analysis of plant equipment. He also taught many courses on the subject of problem-solving and failure analysis for company employees.

Consulting Services:

View Roger W. Griffith's Expert Witness Profile.

Caylor Engineering & Associates, PLLC is a private consulting mechanical engineering firm specializing in NH₃ and CO₂ Refrigeration Systems used in process and cold storage applications. Clients have included Leprino Foods, Safeway, Dreyer’s, Tyson,  ConAgra, Unilever, Nestlé, Imperial Irrigation District, Lineage Logistics, and Grupo Kuo (Kekén).  

Consulting Services:

James Caylor, PE, Principal at Caylor Engineering spent his first 15 years in the refrigeration business were spent as a service and startup technician, including a UA steamfitter apprenticeship, 11 years in the industrial field and the final 8 years self-employed as Caylor Refrigeration. He then returned to college and graduated from Arizona State University in 2000 with a BSME.

Mr. Caylor worked as a project engineer for two design/build contractors and became a PE before moving to Tyson Foods’ corporate design group in 2005.  He joined Jacobs Engineering’s Food and Beverage Group in Fort Worth in 2007, finished in 2013 as Deputy Director in charge of all refrigeration projects and opened his own consulting firm in 2014.

Current committee service includes the International Institute of Ammonia Refrigeration (Standards-CM and Government Relations-VM) and the American Society of Heating, Refrigerating and Air-Conditioning Engineers (Std 15, TC 10.1, TC 10.3 and TC 10.5; VM on all and chair of TC 10.3). He has revised portions of chapter 2 in the 2014 and 2018 editions of the ASHRAE Refrigeration Handbook and is completing calculations of CO2 piping capacities in chapter 3. 

 Mr. Caylor's work with the Refrigerating Engineers and Technicians Association includes vice president of the Oakland, CA chapter, founder and first president of the Phoenix, AZ chapter and presentation of "Evaporator Leaks and Control Valve Selection" at the 2018 RETA National Conference. 

View James Caylor's Expert Witness Profile.