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Staff Biographies

Malcolm Verdict

Malcolm is an Associate Director, Research Engineer, and senior Project Manager for Continuous Commissioning® at the Energy Systems Laboratory (ESL). He serves as chair of ESL’s nationally acclaimed International Conference on Enhanced Building Operations [ICEBO] and the Industrial Energy Technology Conference [IETC] as well as liaison with state and federal government and public energy policy groups.
Malcolm’s field of expertise is in energy management and energy policy. He has had over thirty-four years of experience in these fields in both the public and private sectors. He has provided energy management and Continuous Commissioning® services while at ESL that have saved over $10 million in avoided energy cost.
Malcolm has managed several major Continuous Commissioning® projects for ESL, including the Austin airport and City Hall, Texas Facility Commission, Texas A&M International University, Alamo Community College District and fifteen IBM plants and data centers in US, Canada and U.K. He authored a landmark study for the national Transportation Research Board on “Reducing Energy Use in U.S. Airports.” He is the Lab liaison to state and the Federal governments on energy policy issues related to the ESL mission and serves on the Energy Policy Committee of the Alliance to Save Energy in Washington, D.C.
Prior to joining the ESL, he was responsible for national legislation that requires all federal buildings be constructed 25% greater than AHSRAE, be sub-metered for energy use and have a retro-commissioning assessment every four years. He championed energy efficient construction practices with Millard Fuller, founder of the Habitat for Humanity, which ultimately resulted in their adoption of Energy STAR practices nationwide. He also created the highly successful LoanSTAR revolving loan program for energy retrofits that has saved over $250 million in Texas public buildings since 1991.
Malcolm has B.S. in Mathematics at the U.S. Air Force Academy, a Master’s in Business Administration from Louisiana Tech University and a banking certificate from the SMU School of Banking. He is a Certified Energy Manager [CEM] and a member of the Hall of Fame (2011) of the Association of Energy Engineers as well as recipient of their Energy Manager of Year award (2005).

David Claridge

Dr. David Claridge is the Director of the Energy Systems Laboratory (ESL). He is responsible for the development and implementation of the Continuous Commissioning® group used to improve energy efficiency in hundreds of large building including higher education facilities, medical facilities, office buildings and airports. He is also responsible for developing a significant portion of the techniques incorporated in the International Performance Measurement and Verification Protocol for determination of saving from energy efficiency projects.

Dr. Claridge’s field of expertise is in the field of energy analysis and energy savings. He has over 30 years of experience in energy analysis and measurement in buildings at Stanford University, the Office of Technology Assessment of the U.S. Congress, the Solar Energy Research Institute, and the University of Colorado and at Texas A&M University. He is an ASME Fellow who has served as a member or officer of numerous ASHRAE and ASME committees, and currently serves as a U.S. delegate to the International Energy Agency Annex 47 on Commissioning of Existing and Low Energy Buildings. He is the author of over 300 publications and over 100 reports dealing with analysis and measurement of energy use in both residential and commercial buildings. He is a recipient of the E.K. Campbell Award and the Distinguished Service Award from ASHRAE, a Faculty Distinguished Achievement in Research Award from the Texas A&M Association of Former Students (awarded to six of 2500 faculty members each year) and has received three Best Paper Awards from ASME.

While at the Energy Systems Lab, Dr. Claridge has been the Principal Investigator on over $8 million in research projects. He has worked extensively on building energy calculation methods, ground coupled heat transfer, and analysis methods used to both diagnose HVAC operating problems and measure energy efficiency savings in buildings. He has also led in the development of the Continuous Commissioning process of system fine-tuning which has saved over $75 million in over 300 buildings.

Dr. Claridge received a B.S. from Walla Walla College, a M.S. and a Ph.D. from Stanford University. He is a registered professional engineer and serves as the Leland Jordan Professor of Mechanical Engineering at Texas A&M University.

Bahman Yazdani

Mr. Bahman Yazdani, P.E., has over 38 years of practical experience in the field of energy management, energy efficiency, and energy codes. He has served as the PI for over $45,000,000 in research projects for the USDOE and other research projects in the field of energy efficiency and energy management. Over the years he has helped over 150 municipalities, 20 counties, and 30 school districts in Texas, as well as many other private entities with various energy efficiency programs. Since 2001, Mr. Yazdani has been a Co-Principal Investigator for the ESL’s mandated legislative responsibilities under the Texas Emissions Reduction Plan (TERP). Several of ESL’s mandated responsibilities under the TERP are focused on supporting and assisting the state-wide implementation of the Texas Building Energy Performance Standards. This support is provided by the ESL through various channels including: the review of new energy codes then providing recommendations to the state regarding the adoption of new energy codes, assisting municipalities with local energy-code amendments, developing and providing energy code compliance tools such as the ESL’s International Code Compliant Calculator (IC3), and providing various technical training to code officials and other stakeholders in the building industry. Another main ESL legislative responsibility under the TERP, for which Mr. Yazdani is a Co-Principal Investigator, is to report to state and federal agencies on the impact of energy efficiency programs and renewable energy programs on emissions reduction. Since 2004, Mr. Yazdani has been a Co-Principal Investigator for the US EPA’s National Center of Excellence at the ESL. Over the past eleven years, he has been the Conference Chair for ESL’s Clean Air Through Energy Efficiency (CATEE) Conference. The CATEE Conference, which is held annually, is a premiere educational conference and business exhibition connecting public and private decision makers, for the purpose of helping communities improve decisions that determine the energy and water intensity of the built environment and reduce related emissions. Throughout his 18 years with the ESL, Mr. Yazdani has been heavily involved in the ESL’s Continuous Commissioning® process and projects. He is ESL’s Principal Investigator for the DFW Airport and Houston Airport System projects. Other projects include: the Texas A&M University, Conroe ISD, and Alamo Colleges. In addition, during his time with the ESL, Mr. Yazdani was the manager of the US-DOE Rebuild America Program for Texas for seven years, providing a network of technical and business expertise that helped the state/local governments and businesses cooperate as community partners to save money by: cutting energy use in their facilities, creating jobs, promoting growth, and protecting the environment. Prior to working for the ESL, Mr. Yazdani had served both as the Energy Manager for Dallas County and the Energy Manager for Bryan ISD. He was the President and CEO of Texas Energy Engineering Services, Inc., as well as an independent Engineering Consultant, where he provided engineering design and construction management for various projects including: central chiller plants, direct digital energy management, control systems, alternative energy design, indoor air quality design, and improvements. Mr. Yazdani received a B.S. in Mechanical Engineering from Louisiana State University and a M.S. in Mechanical Engineering from Texas A&M University. He is a registered professional engineer in Texas and is currently an active member of the new State Energy Conservation Office’s Energy Codes Compliance Collaborative for Texas (2012). He is a member of the North Central Texas Council of Governments (NCTCOG) Building and Energy Advisory Board, NCTCOG Regional Coordinating Committee, and the Building Officials Association of Texas.

Jeff S. Haberl

Dr. Jeffrey S. Haberl, P.E.inactive, is a Professor of Architecture and Associate Department Head for Research in the Department of Architecture at Texas A&M University. He is also an Associate Director of the Energy Systems Laboratory. He is an ASHRAE Fellow, an IPMVP Fellow, and an IBPSA Fellow. Dr. Haberl's educational background includes B.S., M.S., and Ph.D. degrees from the University of Colorado at Boulder and post-doctoral research at Princeton University's Center for Energy and Environmental Studies. Dr. Haberl came to Texas A&M in 1989 and has dedicated nearly 3 decades ($32.8M as a Co-PI and $2.3M as a PI) performing building energy research at Texas A&M University, Princeton University, the University of Colorado, Rockwell International, the Colorado State Office of Energy Conservation, the City of Boulder, and the USDOE Administrative Services.

His work emphasizes building energy modeling, statistical modeling, methods for diagnosing operational problems, operator feedback using comparisons of predicted and actual energy use, artificial intelligence, advanced energy usage graphics, prescreening calculations for improving commercial and residential energy audits, public-domain M&V algorithms, computerized solar shading procedures, accuracy tests for HVAC systems, BIM-to-thermal procedures, and procedures for calculating air pollution savings from energy efficiency and renewable energy projects (i.e., SOx, NOx, CO2, PM and Hg).

He is a Co-PI of the Laboratory’s Texas Emissions Reduction Program (TERP), along with Mr. Bahman Yazdani, where he provides technical leadership for the code compliance calculator and emissions calculations from energy efficiency and renewable energy. He is a Co-PI for the USEPA’s National Center of Excellence on Displaced Emissions Reductions (CEDER), with Dr. Charles Culp and Mr. Bahman Yazdani, which was established in the Spring of 2007 to help the EPA transfer the Texas emissions reductions calculation procedures to other states; a Co-PI for the Laboratory’s Continuous Commissioning® program for improving energy efficiency in existing buildings; PI and/or Co-PI on numerous ASHRAE Research Projects (RP-827, RP-865, RP-1050, RP-1093, RP-1017, RP-1468); Co-PI on an NSF project for creating physically-based, BIM-to-thermal simulations; PI on the NAS TRB project for benchmarking airport terminal energy use; and the Co-PI of Texas A&M University’s 2007 Solar Decathlon Effort, with Pliny Fisk as the PI.

He was the Principal Investigator for the Computer Support and Improved Energy Audit of the Texas LoanSTAR project from 1990 to 2002, a $98.6 million revolving loan for the state of Texas that was the largest first large-scale project in the United States to continuously measure and report energy savings in over 160 building energy conservation retrofits, and he has served as the Chair for 17 MS and 16 PhD students.

Dr. Haberl is a registered, inactive Engineer in the State of Texas (P.E. #67618), has authored or co-authored 50 publications, 24 books or book chapters, 185 conference proceedings, 266 publications, 331 reports, developed 54 software packages, and holds numerous U.S. patents. He was the chairman for ASHRAE’s Performance Metric Protocols committee, and he has been the chairman of TC 4.7, and the Handbook chairman of ASHRAE TC 1.5 (Computer Applications) and has contributed to the ASHRAE Handbook Chapters #49 and #60. He also helped develop ASHRAE Standard 140 and ASHRAE Guideline 14. He received a Boulder County Energy Conservation Award, two USDOE innovative research awards for work performed at the University of Colorado (with Dr. Claridge), a USDOE special citation for his work at the Forrestal and Germantown complexes, a 1990 GSA Design Award, and a 1992 National Endowment of the Arts Federal Design Award for his work at the Forrestal building, and a 2001 ASHRAE Distinguished Service Award.

Detailed bio.(PDF)


David E. Claridge


  • B.S. (cum laude), 1964, Engineering Physics, Walla Walla College
  • M.S., 1966, Physics, Stanford University
  • Ph.D., 1976, Physics, Stanford University
  • Professional Engineer (Mechanical), State of Texas #69305
  • Professional in Continuous Commissioning (PCC®)


  • 9/07 – Present Director, Energy Systems Laboratory, Texas A&M Engineering Experiment Station, Texas A&M University System, College Station, Texas
  • 1/05 – Present Holder of Leland Jordan Endowed Professorship, Mechanical Engineering Department, Texas A&M University, College Station, Texas.
  • 9/95 - Present Professor, Mechanical Engineering Department, Texas A&M University, College Station, Texas.
  • 3/07 – 8/07 Deputy Director, Energy Systems Laboratory, Texas A&M Engineering Experiment Station, Texas A&M University System, College Station, Texas
  • 9/90 – 3/07 Associate Director, Energy Systems Laboratory, Texas A&M Engineering Experiment Station, Texas A&M University System, College Station, Texas
  • 9/86 - 8/95 Associate Professor, Mechanical Engineering Department, Texas A&M University, College Station, Texas.
  • 1/82 - 8/86 Associate Professor of Civil, Environmental & Architectural Engineering, University of Colorado, Boulder.
  • 1/80 - 1/82 Manager, Analysis Group (10/80-1/82) and Senior Program Planner/Senior Research Analyst (1/80-1/82), Solar Energy Research Institute, Golden, Colorado.
  • 1/76 - 1/80 Project Director (7/79-1/80), Professional Staff Member/Analyst (1/77- 7/79) and Congressional Science Fellow (1/76-1/77), Office of Technology Assessment (OTA), U. S. Congress.

Dr. Claridge is internationally known for his work over the last 20 years directing the development and participating in the implementation of the Continuous Commissioning® process for improving the comfort and energy efficiency of buildings. It has been applied in several hundred large buildings that include higher education facilities, military facilities, medical facilities, and office buildings. He has made major contributions to the analysis of heat transfer between buildings and ground and to the analysis of air leakage in buildings. He is also a world leader in development and application of measurement and verification techniques to determine savings from efficiency projects..

He has taught numerous commissioning workshops and is the author of over 400 journal and conference papers and holds 12 patents. He had 10 years of experience in the HVAC field, prior to coming to Texas A&M in 1986. He frequently gives presentations at national and international conferences and is a Fellow of the American Society of Mechanical Engineers and of ASHRAE and is active nationally in both societies.

Significant Honors And Awards

  • Honorary International Member, Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 2011
  • Faculty Distinguished Achievement in Research Award, Texas A&M University Association of Former Students, 2003 (Six awarded among ~2500 faculty each year)
  • ASHRAE Fellow, 2008
  • ASME Fellow, 2001
  • TEES Senior Fellow, Texas A&M Engineering Experiment Station, September, 1999
  • E.K. Campbell Award of Merit from the American Society of Heating, Refrigerating and Air Conditioning Engineers for outstanding service and achievement in teaching, January, 1998
  • TEES Fellow, Texas A&M Engineering Experiment Station, September, 1997 and September, 1998
  • Graduate Teaching Award, Texas A&M Mechanical Engineering Department, October. 1997
  • Distinguished Service Award, American Society of Heating, Refrigerating and Air Conditioning Engineers, June, 1997
  • Dresser Industries Professorship, Dwight Look College of Engineering, Texas A&M University, September, 1996
  • Best Paper on Conservation and Solar Buildings, ASME Solar Energy Division, 1988-89, 1991-92 and 1993-94.
  • Congressional Science Fellow of the American Association for the Advancement of Science, 1976.


  • Over 400, including technical journals, books, book chapters, and conference publications, including over 100 dealing with monitoring of buildings, analysis of monitored building data, or building diagnostics. He is also an author of well over 100 reports.

Research Projects

P.I. or Co-P.I. on over $45 million in projects.

Student Research Advising

Advisor for 70 completed M.S. degrees and 14 Ph.D. degrees

Professional Service

  • Member, ASHRAE Conference and Expositions Committee
  • Member, ASHRAE Conference and Expositions Executive Committee
  • Technical Chair, ASHRAE 2015 Annual Meeting, Atlanta
  • ASHRAE Guideline Project Committee 0.2 The Systems Commissioning Process for Existing Buildings
  • Editorial Board, Journal of Building Performance and Simulation
  • Past activities include serving as President, ASHRAE College of Fellows, Deputy Editor, International Journal of Energy Research, Director or Technical Program Chairman of six conferences and as a member or officer of numerous ASHRAE and ASME committees, including chair of ASHRAE Special Publications Committee, chair of ASHRAE TC 4.7 Energy Calculations Committee, and Chair of the ASME Solar Energy Division.
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