A Team of Certified Energy Experts in Texas
Green Building Energy Sustainability (GBES) is a Texas-based energy consulting and inspection firm specializing in building performance, energy efficiency, and sustainable design verification.
Our multidisciplinary team includes:
• Professional Engineers
• Certified Energy Code Inspectors
• Infrared Thermographers
• RESNET HERS Raters
We help clients reduce risk, improve efficiency, and achieve compliance through scientific testing and integrated planning.
Our mission: Build smarter today for a more efficient tomorrow.
Jeremy is a passionate fisherman, dog lover, and devoted family man. He has a daughter, Riley, and is expecting another child later this year. Jeremy has a remarkable background in Quality Control, Customer Service, and Hospitality from his tenure at the Ritz-Carlton in Laguna Niguel, California. He worked with a California Builder as an Associate Loan Officer. Jeremy was also a Landscaping Supervisor when he worked, overseeing crews. His infusion of knowledge, experience, and professional ism into his roles as President of GBES, Energy Code Inspector, EDI Stucco Inspector, and Level II Infrared Thermogra her shows his professionalism. Jeremy merges his interest in construction and Energy Efficiency with an unwavering commitment to excellence and professionalsm to improve the world. He is hard working and dedicated, with a can do attitude that adds exceptional value to the business and profession.
Jeremy Wentz
GBES PresidentIECC #10276573 79 EDI # TX 243
Luis is a Spanish-speaking Fort Worth native and first-generation college graduate. Luis pursued a Bachelor of Science in Mechanical Engineering Technology from the University of North Texas. He worked in the construction field as an apprentice for many years under his father, a Residential Framing contractor. Luis has always been captivated by the art of digital modeling and building homes. His degree in Engineering has helped him deepen his understanding of energy efficiency through courses such as Heat Transfer and Thermodynamics. Science plays a tremendous role in Energy Conservation and Energy Efficiency. Luis began performing 3rd-party energy code inspections, pressure testing, and Thermal Imaging in 2021. He is also certified in commercial air balancing. He has continued to learn and grow his expertise in the field daily. Luis is certified as a Residential and Commercial Energy Inspector by the International Code Council. He is a Home Energy (HERS) Rater with the Residential Energy Services Network (RESNET), a Level III Thermographer, and a certified Commercial and Residential Green Building inspector with the IgCC.
Luis Chabes
GBES Vice PresidentIECC #10164111 77/79 B.S. Mechanical Engineering Technology Undergraduate Academic Certificate in Manufacturing Engineering Technologies, Infraspection Level III Thermographer 19260
Adrian Jourdan is a Mechanical and Energy Engineer whose expertise spans residential and commercial energy inspection. He is a HERS (Home Energy Rating System) Rater and a recognized authority in evaluating and optimizing building energy efficiency. Adrian is also a Level II Thermographer and bilingual in English and Spanish. He is committed to sustainability and energy conservation as he assesses structures to ensure they meet the highest energy performance standards.
Adrian generates Manual J, S, and D calculations, as well as Manual N calculations, for Commercial and Residential properties. He is certified in commercial air balancing. He is passionate about environmental responsibility as he is pivotal in creating comfortable, energy-efficient, and environmentally friendly spaces. Adrian’s dedication to mechanical engineering and energy efficiency helps transform structures into energy-efficient, sustainable buildings. He strives to shape a greener and more efficient future for residential and commercial spaces.
Adrian Jourdan
GBES SecretaryMechanical and Energy Engineer IECC #10111758 77/79 Resnet HERS Rater 0311071 Commercial Air Balancing
Jacqueline serves as Bookkeeper and Treasurer with a strong commitment to accuracy, transparency, and thoughtful financial stewardship. She genuinely enjoys keeping things organized and ensuring every detail is properly documented. Jacqueline helps GBES operate smoothly and responsibly. Beyond the numbers, she is a proud wife and mom who understands the importance of balance, trust, and community. When she is not working, you’ll likely find her with her nose in a good book. She brings the same care and dedication to her work that she brings to her family and personal passions—believing that integrity, consistency, and heart matter in everything she does.
Jacqueline Wentz
GBES Treasurer
Jim Hemsell has been a building inspector for over 45 years and helped evaluate over 30,000 residential and commercial buildings. He is a Certified Energy Manager with AEE, a Level III Thermographer, and a HERS Rater. Jim holds 6 ICC certifications in Energy and Green Building inspections and is a Certified EDI Stucco inspector. He is a Level III Thermographer. Jim is a retired TREC Professional Inspector and Lead Paint Risk Assessor. Jim has helped start numerous businesses, bringing experience and perspective to Green Building Energy Sustainability. He is dedicated to improving Energy Efficiency in Commercial and Residential buildings and improving the Sustainability of buildings and businesses using technology and Predictive Preventive Maintenance practices. Jim started GBES and helps with finances, sales, scheduling, training, and company development.
Jim Hemsell
GBES Strategic consultantCertified Energy Manager 25143 ICC 5242295 77/78/79, ECS, G1, G8 Level III Thermographer 9632, Retired TREC Professional Inspector #129