GEI Principals

Chad Griffith, PE, CEM, CCP, LEED AP
Chad Griffith, PE, CEM, CCP, LEED APPresident

A Closer Look

Chad resides in Dunwoody, Georgia with his wife and three boys. Outside of managing Griffith Engineering, Chad enjoys spending time with his family and being involved in the local community. Chad has spent time as an Assistant Scoutmaster with Boy Scout Troop 477, and coaching wrestling with the Nava Breffle youth wrestling program in Dunwoody. In general, Chad looks forward to opportunities to inspire and motivate people around him to overcome challenges and realize more of their potential. Some of Chad’s hobbies include hiking, traveling, playing basketball, and watching college football and basketball.

Chad earned his Bachelor of Science in Mechanical Engineering degree from North Carolina State University in 1995. He is the founder and President of Griffith Engineering, Inc. (GEI), and serves as the firm’s Managing Principal. His more than 20 years of industry experience includes mechanical system design, project management, energy auditing, and energy modeling.

He is a licensed professional engineer in sixteen (16) states and is a Certified Energy Manager (CEM), a Certified Cogeneration Professional (CCP), and a Leadership in Energy and Environmental Design Accredited Professional (LEED AP).

Chad’s professional affiliations include the National Council of Examiners for Engineering and Surveying (NCEES), the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE), the U.S. Green Building Council (USGBC), the International Code Council (ICC), the Association of Energy Engineers (AEE), the National Fire Protection Association (NFPA), the American Society of Mechanical Engineers (ASME), the Central Contractor Registration (CCR), and the Georgia Association of Physical Plant Administrators (GAPPA).

His notable design experience includes:

John R. Nott, PE, CEM, CMVP, LEED Green Associate
John R. Nott, PE, CEM, CMVP, LEED Green AssociatePrincipal
John earned his Bachelor of Mechanical Engineering degree from the Georgia Institute of Technology in 2007. He resides in Peachtree Corners, Georgia, with his wife and daughter. When he’s not doting on his daughter, John enjoys rooting on the Georgia Tech Yellow Jackets at various sporting events.

He also stays connected to his alma mater by serving as the scholarship chair of the local alumni club. John’s hobbies include collecting old engineering books, old maps, and refinishing furniture. He is always up for a competition and enjoys playing games and sports with friends and family. He considers himself adventurous and doesn’t pass up the opportunity to go new places and trying new foods.

John is a licensed Professional Engineer in Georgia, and is both a Certified Energy Manager (CEM) and a Certified Measurement & Verification Professional (CMVP) through the Association of Energy Engineers (AEE), and a LEED Green Associate (LEED GA).

John leads GEI’s Energy Modeling team. This team develops models with several traditional modeling software products, and also develops custom programs to evaluate specific measures. He is also very involved with other aspects of GEI’s energy projects including auditing and reporting. John has a background in mechanical systems design and performance contracting, which gives him a unique perspective on the application of many leading energy efficiency strategies. John combines the practical application of proposed energy conservation measures with over a decade of experience evaluating their impacts to ensure accurate predictive modeling, design and construction feasibility.

John’s recent project experience includes the following:

Ryan Parkins, PE
Ryan Parkins, PEPrincipal


Wally B. Ray, PE, CEM, LEED AP BD+C
Wally B. Ray, PE, CEM, LEED AP BD+CPrincipal
Born and raised in Winston-Salem, North Carolina, Wally is a 1996 graduate of North Carolina State University where he earned his Bachelor of Science in Mechanical Engineering degree. He lives with his wife and twin daughter in Cornelius, North Carolina. Outside of his role of managing the Charlotte office of Griffith Engineering, Wally enjoys spending time with his family and being active in his church and community. Wally has spent time volunteering with Habitat for Humanity, serving as a deacon at his church, and helping coach his daughters’ soccer teams. Wally’s personality and leadership style are supportive: he takes pride in motivating GEI team members and encouraging them to reach their potential. Wally enjoys hiking and camping with his family, and is a home theater aficionado.
Wally manages GEI’s Charlotte office. He also serves as Project Manager and lead mechanical engineer on projects that originate in that office. Wally also has mechanical and energy engineering responsibilities on other GEI projects outside of North Carolina.

Wally is a licensed professional engineer in six states, is a LEED Accredited Professional (LEED AP BD+C), is a Certified Energy Manager (CEM). His professional affiliations include the Association of Energy Engineers (AEE), the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), and the American Society of Plumbing Engineers (ASPE).

Wally’s notable project experience includes:

  • Naval Air Station Oceana energy audit and engineering design, Virginia Beach, VA
  • Hoke County School System energy audit, Raeford, NC
  • Mayland Community College renovations, Statesville and Morrisville, NC
  • University of North Carolina at Charlotte multiple renovation projects, Charlotte, NC
  • Memorial University of Newfoundland energy audit and utility analysis, St. Johns, Newfoundland, Canada
  • Forsyth County School System renovations and upgrades, Cumming, GA
  • Veach Baley federal building chiller replacements, Asheville, NC
  • Terry Sanford Federal Building and U.S. Courthouse renovations and upgrades, Raleigh, NC
  • Charles Jonas Federal Courthouse project development study, Charlotte, NC
  • U.S. Custom House study, Charleston, SC
Bart W. Stewart, PE, CEM
Bart W. Stewart, PE, CEMPrincipal
Born and raised in Reidsville, Georgia, Bart is a 1994 graduate of Southern Polytechnic State University (now Kennesaw State University) where he earned a Bachelor of Science in Mechanical Engineering Technology degree.

He resides in Peachtree City, Georgia, with his wife Aude and two stepsons Adrien and Arthur. Bart is an outgoing person who enjoys working with others and creative problem solving. He and his wife are active as volunteers at Southside Church in Peachtree City.

Bart has several hobbies that he enjoys including collecting antique handguns, garden railroading, and playing the acoustic guitar. He also has a General Class Amateur radio license and plans to set up his HF base station in the near future. A gadget lover at heart, Bart loves finding new electronic and mechanical toys to add to his collection. He has a great dry sense of humor and loves to be with a group a people who enjoy life as he does. Bart enjoys riding motorcycles and hopes one day to replace the Harley Road King Classic that he sold several years ago. He also enjoys riding road bikes, and doing projects around the house, but his greatest joy is spending time with his family.

Bart is a licensed Professional Engineer in Georgia and is a Certified Energy Manager (CEM) through the Association of Energy Engineers (AEE). He is also a graduate of the 6 month Trane Professional Engineering Sales program in Lacrosse, Wisconsin. He has provided training nationwide on psychrometrics and variable flow chilled water systems. He wrote the scripts for a psychrometrics DVD training series.

Bart leads all energy projects for GEI and provides cause and origin engineering support to insurance companies on fire claims that have a potential to lead to litigation. He also leads the firm’s commissioning and retrocommissioning projects.

Bart’s project experience includes the following:

Christine Trovato, CFO
Christine Trovato, CFOPrincipal