Objectives
It is the objective of the ACOE to maintain the association as an organization of chief engineers, or the industrial equivalent thereof, who have a special interest in the practices of plant engineering. The organizational activity, within the scope of this specialized field of interest, shall be dedicated to the improvement of service to its members, their employing companies, the engineering profession and the community. Association activities shall be directed to accomplish the specific objectives of education, the exchange of information, plant tours and service on governmental licensing boards and industrial code boards.
It is an objective of the association to provide, through an apprenticeship program, a better qualified stationary engineer and to promote the welfare and raise the standard of engineers by instituting educational programs within our organization.
The association emphasizes supervisory concepts and helps the engineer better direct and motivate his staff and interface effectively with other areas of management.
The association strives to enhance the prestige and professional status of stationary engineers and, when appropriate, to serve as a “voice of the stationary engineer.”
It is a goal of this association to maintain an effective level of membership participation.

Code of Ethics
No disclosure of information by a member of the ACOE shall be used for his or her employer’s disadvantage.
ACOE membership shall never be used as a tool of salesmanship toward other members or their employers.
No member of the ACOE shall align himself with any vendor, contractor or supplier for the express purpose of personal gain.
No member of the ACOE shall ever knowingly say or do anything which may jeopardize the position of another member with his or her employer.
Members of the ACOE are expected to conduct themselves in a professional manner in the normal routine of their duties so as to enhance the dignity of their profession and their affiliation with the Association.
Any member that is found to have acted in an unethical manner, by the ethics committee, and is voted on as such, by a quorum of, and at a general meeting will result in the individual’s dues not being accepted for the following year, nor will that person be considered for future membership, unless otherwise stated at the time voting takes place.
Board Of Directors

Hector Rios Jr, Chief Engineer at Transwestern
ACOE President
Cell Phone: 281-960-3528
Email: hector.rios@transwestern.com
Hector Rios Jr. is the Chief Engineer at Transwestern. Hector joined Transwestern in 2018 as a Lead Engineer at Waterway 1 & 2 in The Woodlands. As a result of his leadership, knowledge and dedication, he quickly promoted to Assistant Chief Engineer and shortly after to Chief Engineer at the new Leed Platinum Bank of America Tower building in Downtown Houston.
Hector started his career in the Operating Engineering Field in 2007 when he took an apprenticeship with PMRG. After leaving PMRG in 2012, he transferred to the Bank of America Center, which is now owned and operated by M-M Properties. During his time at the Bank of America Center, he worked as an Operator and gained valuable insight into building operations. He also worked at Hines as an Operating Engineer before making his leadership move to Transwestern. As a leader, Hector has gained the trust and respect of his team and continues to grow in knowledge.
Hector always seeks opportunities to expand his knowledge in his career and has obtained the following credentials, a Third Grade Stationary Engineering License, Maintenance Electrician License and an EPA Universal Certificate.
Hector, a native Houstonian, is the proud father of a ten-year-old son and a seven-year-old daughter. In his spare time, he enjoys going fishing and playing soccer.
Felix Rodriguez, Assistant Director of Operations Simon Property Group
Vice President
Work Phone: 713-966-3535
Email: frodriguez@simon.com
Felix began his career as an apprentice at The Galleria, where he earned his Stationary Engineer License and developed a strong foundation in building operations. He later transitioned into property management, gaining valuable experience in Class A office building operations, which led to a leadership role as Chief Engineer with Cameron Management.
Committed to professional growth, Felix moved into a Project Manager and Business Development Manager role with a local contracting company, overseeing tenant build-outs at The Galleria. His return to the retail environment reaffirmed his passion for the industry and propelled him into his current position as Assistant Director of Operations at The Galleria.
Since 2013, Felix has been a key contributor to the team managing the daily operations of The Galleria, a Level VI, 12-million-square-foot property that includes major anchors, high-rise office buildings, and hotels. The Galleria is the largest mall in Texas and the fourth largest in the United States.
In 2022, Felix was recognized as Best of the Best Peer Choice in the Southwest Region by Simon Property Group. Known for his strong work ethic and “CAN DO” attitude, he plays a critical role in maintaining safety standards, overseeing tenant build-outs, and supporting emergency response efforts.
A native Houstonian, Felix has built a strong nationwide network within the Construction, Engineering, and Property Management industries, and is respected for his leadership, professionalism, and collaborative approach.
Glen Llamas, Senior Chief Engineer at STREAM
Treasurer
Work Phone: 713-679-9117
Email: Glen.Llamas@streamrealty.com
Glen Llamas is an accomplished and results-driven Stationary Engineer with over 30 years of proven success in Service Management and Operations, Diagnostics, Repair, Building Maintenance, Preventive Maintenance, Engineering, Supervision, Training, and Tenant/Staff Relations. Known for his reliability and professionalism, Glen consistently meets commitments, assesses situations quickly, and delivers high-quality results on time and within budget.
He has a strong track record of implementing innovative and effective staff development strategies, fostering a customer-focused culture that enhances organizational satisfaction while reducing operational costs, waste, and loss. Glen currently serves as a board member for the Association of Chief Operating Engineers (ACOE) and Hispanics in Commercial Real Estate (HCRE), where his active networking has helped him build an extensive base of engineering and property management contacts.
Glen thrives in fast-paced, dynamic environments, maintaining a practical, focused, and solution-oriented approach to every challenge. His expertise includes Commercial Maintenance, Repair, and Construction; Management and Operations; HVAC; Electrical; Mechanical; Plumbing; Troubleshooting; Preventive Maintenance; Procurement; Vendor Relations; Boilers; Hot Water Heaters; Laundry Equipment; Blueprint and Wiring Diagram Interpretation. He also possesses excellent hand dexterity and eye coordination and is bilingual, fluent in both English and Spanish.
Elias Iglesias, Lead Engineer at Transwestern
Secretary
Cell Phone: 832-768-3027
Email:
elias.iglesias@transwestern.com
Elias Iglesias is the Lead Engineer at Transwestern with over 17 years of experience in commercial building operations and engineering. He was recognized as the ACOE Engineer of the Year in 2024 and named Transwestern Rising Star in 2023, honoring his leadership, technical expertise, and commitment to excellence.
Elias specializes in HVAC, plumbing, electrical systems, and fire/life safety, with a proven ability to maintain safe, efficient, and high-performing building operations. In his role, he oversees daily engineering functions, preventive maintenance programs, vendor coordination, and system troubleshooting, ensuring reliability, compliance, and tenant satisfaction.
An active member of the Association of Chief Operating Engineers (ACOE), Elias remains engaged in professional development and industry best practices. Known for his strong work ethic, hands-on leadership, and problem-solving skills, he mentors engineering teams, supports operational improvements, and contributes to energy efficiency and long-term asset performance.
Oscar Gomez Assistant Chief Engineer at Griffin Partners
Position #1
Work Phone: 281-772-1408
Email: ogomez@griffinpartners.com
Oscar joined Griffin Partners in 2018 as an Apprentice Engineer, quickly distinguishing himself through his strong work ethic, technical ability, and dedication to professional growth. Over the past six years, he has rapidly advanced to the role of Assistant Chief Engineer, a testament to his commitment, leadership potential, and consistently high performance.
In his current position, Oscar plays a key role in supporting building operations across multiple Griffin commercial office properties, as well as industrial facilities. He is actively involved in preventive maintenance, system troubleshooting, vendor coordination, and daily engineering operations, helping ensure that properties operate efficiently, safely, and in compliance with industry standards.
Oscar has earned his SMA / SMT professional designations through SEAS / BOMA, reflecting his dedication to expanding his technical knowledge and industry expertise while attending Houston Community College (HCC) over the past four years. His ongoing commitment to education and skill development continues to strengthen his impact within the engineering and property management fields.
Outside of work, Oscar enjoys spending quality time with his family and friends, and is known for his positive attitude, reliability, and eagerness to learn. His strong foundation in engineering operations, combined with his drive for continuous improvement, positions him as a rising professional with a promising future at Griffin Partners.

Adrian Escareno, Chief Engineer at JLL
Position 2
Cell Phone: 832-570-9031
Email: adrian.escareno@am.jll.com
Adrian Escareno serves as Chief Engineer at JLL, bringing seven years of extensive industry experience in building operations and engineering leadership. Mr. Escareno has established a distinguished reputation for his technical expertise, reliability, and unwavering commitment to operational excellence.
Throughout his tenure at JLL, Mr. Escareno has exhibited consistent professional growth and exemplary leadership, garnering recognition for his dedication and outstanding performance. His significant contributions and impact were formally acknowledged when he was bestowed the title of JLL Rising Star in 2019, subsequently followed by the prestigious honor of JLL Engineer of the Year in 2024—a testament to his continuous professional development and leadership prowess within the organization.
Mr. Escareno possesses an impressive array of professional credentials, including SMA and SMT certifications, an Electrical License, and an HVAC 1 License. He maintains an unwavering commitment to expanding his technical knowledge base and advancing his career within the commercial real estate and facilities management sectors.
Beyond his professional pursuits, Mr. Escareno engages in activities such as boxing, golfing, fishing, and real estate investment. These interests reflect his disciplined approach, competitive spirit, and long-term strategic mindset, qualities that are evident in both his professional and personal endeavors.
“The dignity of labor is the foundation of all respect.” — Grover Cleveland
President’s Roster
- 1952 R. E. Humphrey
- 1953 F. D. Garvin
- 1954 O. W. Rosin
- 1955 C. V. Parker
- 1956 V. B. Wampler
- 1957 R. F. Dowling
- 1958 D. E. Eames
- 1959 A. R. Plowman
- 1960 H. U. Matthew, Jr.
- 1961 H. B. Dodge
- 1962 S. A. Winn
- 1963 J. V. Stephens
- 1964 Joe Sadler
- 1965 R. E. Brown
- 1966 J. H. Rider
- 1967 H. L. Harrell
- 1968 Walter Linderman
- 1969 Jerry Trncak
- 1970 J. B. Deglandon
- 1971 James Lewis
- 1972 Ben Buckner
- 1973 Bill Gray
- 1974 Al Barstch
- 1975 J. L. Kelley
- 1976 John Thomason
- 1977 Jacki Meyers
- 1978 John Woods
- 1979 John Little
- 1980 Tony Morille
- 1981 Ronald T. Peters
- 1982 Donald Chrisner
- 1983 C. J. Portella
- 1984 Albert W. Sallee
- 1985 Don McCartney
- 1986 Marvin E. Henry
- 1987 Thomas Easley
- 1988 James Thornton
- 1989 Roy A. Paul
- 1990 Richard B. Dudczak
- 1991 T. Soule / G. Perez
- 1992 Scott Van Dusen
- 1993 Ron Hutchinson
- 1994 Edmond Yargo
- 1995 Dave Teehee
- 1996 Joe Mathis
- 1997 Ronald T. Peters
- 1998 Rick Gates
- 1999 Melvin T. Craddock
- 2000 John T. Bays
- 2001 Tim Nall
- 2002 Richard Burrows
- 2003 David Pommerencke
- 2004 Lloyd Wilkinson
- 2005 Steven Lloyd
- 2006 Lloyd Blackstock
- 2007 Danny Rodriguez
- 2008 Jack Hollis
- 2009 Dennis Wingo
- 2010 Danny Allsup
- 2011 Tommy Wood
- 2012 Danny Rodriguez
- 2013 Danny Rodriguez
- 2014 Tom Wilson
- 2015 Tom Wilson
- 2016 Rudy Matamoros
- 2017 Rudy Matamoros
- 2018 Jose Hernandez
- 2019 Jose Hernandez
- 2020 Jericho Whitener
- 2021 Jericho Whitener
- 2022 Jose Hernandez
- 2023 Jose Hernandez
- 2024 Felix Rodriguez
- 2025 Felix Rodriguez
- 2026 Hector Rios
ACOE Founders
- A. A. Reinhart
- A. B. Pitts
- Alton Elliot
- C. V. Parker
- D. L. Taylor
- F. D. Garvin
- F. W. Berma
- Foy Gates
- H. A. Reeves
- H. T. Pearson
- Ira Deglandon
- K. G. Warfield
- L. H. McCoy
- L. O. Sudduth
- O. W. Rosin
- R. A. Amal
- R. B. McFarland
- R. D. Williams
- R. D. Withrow
- R. E. Humphrey
- R. P. Massey
- R. W. Means
- V. P. Wampler
- W. P. Giles
Thank you to all that served.
Our sincere gratitude to the pioneers who foresaw the need for this organization.




