Meet The Board
Our Board of Governors
2025-2026
Aaron Besseling, C.Tech
President
Aaron has been involved in the chapter since 2015 and held various positions in the Chapter since then. He is a project manager at Besseling Mechanical Inc.
Company: Besseling Mechanical Inc
Education: Fanshawe College, Construction Engineering (2009 – 2012)
Interests: Golf and running………after my kids
Committee History: Chapter Technology Transfer, Young Engineers in ASHRAE, Student Activities
Christopher Hofland, M.Eng., P.Eng., CEM, CMVP’s
President-Elect
Chris has been serving in Chapter Communications since 2018. Under his leadership, we have seen many improvements to chapter communication, including the Hamilton Airways Newsletter, Website and LinkedIn page.
He is currently a Commissioning Consultant at RWDI.
Company: RWDI
Interests:
Committee History: Communications, Newsletter
Jorge Chavez
Secretary
Jorge has been involved in the chapter since 2023. He has over four years of HVAC industry experience and currently holds a position as Technical Sales Representative at Enviroair Industries supporting engineer consultants and mechanical contractors.
Company: Enviroair Industries
Education: Tecnologico de Monterrey, BSc Mechanical Engineering with Electrical Minor (2005 – 2010)
Interests: Travel, Pickleball, Salsa
Committee History: Sustainability
Reaz Usmanali
Chapter Treasurer
Reaz has been involved in the chapter since 2009, starting as Chapter Research Promotion Chair. He has served in various roles including Chapter President (2012 – 2014), – In 2018, he earned the recognition of the Chapter Service Award for dedication and commitment as a chapter member.
He is currently an Account Executive at Johnson Controls.
Company: Johnson Controls Canada
Education: University of Guyana, Electrical Engineering (1987 – 1992)
Interests: Cricket, Travel
Committee History: Research Promotion, Chapter Technology Transfer, Membership Promotion
Mitchell Rohrer, P.Eng.
Past President (2022 - 2024)
Mitchell has been involved in the chapter since 2016, joining as Chapter Technology Transfer (CTTC) Co-Chair. In 2021, he received the ASHRAE Society Dan Mills Chapter Programs Award, which recognizes excellence in ASHRAE chapter program endeavors specific to CTTC for all of ASHRAE.
Mitchell has over nine years of industry experience, working in various roles relating to the HVAC equipment solutions line of business. He is currently an Account Executive at Johnson Controls supporting building owners, consultants and mechanical contractors.
Company: Johnson Controls Canada
Education: McMaster University, Mechanical Engineering & Management (2010 – 2015)
Interests: Hockey, Running, Strength Training, Golfing
Committee History: Chapter Technology Transfer, Research Promotion, Webmaster
WHAT WE DO
About the Board
The above members contribute to the success of the Hamilton Chapter as elected chapter officers forming the Board of Governors. The Board of Governors of the Hamilton Chapter are responsible for managing the affairs of the chapter including: budget, oversight, support for the committees, leadership, and achieving targeted goals; all in accordance with the bylaws of the Society and the chapter.
Please feel free to contact a chapter officer if you have questions, comments, or you are interested in participating with the chapter.
hISTORY OF bOARD OF gOVERNORS
Record
2023 – 2024
President:
Mitchell Rohrer
President-Elect:
Aaron Besseling
Secretary:
Stan Holko
Treasurer:
Reaz Usmanali
Past-President:
Iain Hill
2022 – 2023
President:
Mitchell Rohrer
President-Elect:
Aaron Besseling
Secretary:
Stan Holko
Treasurer:
Reaz Usmanali
Past-President:
Iain Hill
2021 – 2022
President:
Robyn Ellis
President-Elect:
Mitchell Rohrer
Secretary:
Stan Holko
Treasurer:
Aaron Besseling
Board of Governors:
Marco Ciallella
Iain Hill
Christopher Hofland
Mark Long
John Molnar
Mustafa Morsy
Jeremy Stockmans
Reaz Usmanali
2021 – 2022
President:
Robyn Ellis
President-Elect:
Mitchell Rohrer
Secretary:
Stan Holko
Treasurer:
Aaron Besseling
Board of Governors:
Marco Ciallella
Iain Hill
Christopher Hofland
Mark Long
John Molnar
Mustafa Morsy
Jeremy Stockmans
Reaz Usmanali
2021 – 2022
President:
Robyn Ellis
President-Elect:
Mitchell Rohrer
Secretary:
Stan Holko
Treasurer:
Aaron Besseling
Board of Governors:
Marco Ciallella
Iain Hill
Christopher Hofland
Mark Long
John Molnar
Mustafa Morsy
Jeremy Stockmans
Reaz Usmanali
2020 – 2021
President:
Robyn Ellis
President-Elect:
Mitchell Rohrer
Secretary:
Stan Holko
Treasurer:
Aaron Besseling
Board of Governors:
Marco Ciallella
Iain Hill
Christopher Hofland
Mark Long
John Molnar
Mustafa Morsy
Jeremy Stockmans
Reaz Usmanali
2019 – 2020
President:
Iain Hill
President-Elect:
Robyn Ellis
Secretary:
Stan Holko
Treasurer:
Aaron Besseling
Board of Governors:
Mark Long
George Menzies
Frank Mesicek
John Molnar
David Rasmussen
Mitchell Rohrer
Reaz Usmanali
2018 – 2019
President:
Iain Hill
President-Elect:
Robyn Ellis
Secretary:
Stan Holko
Treasurer:
Aaron Besseling
Board of Governors:
Allan Antcliffe
Mark Long
George Menzies
Frank Mesicek
John Molnar
David Rasmussen
Mitchell Rohrer
Reaz Usmanali
2017 – 2018
President:
Frank Mesicek
President-Elect:
Iain Hill
Secretary:
Aaron Besseling
Treasurer:
Allan Antcliffe
Board of Governors:
Robyn Ellis
Mark Long
George Menzies
Frank Mesicek
John Molnar
Mustafa Morsy
David Rasmussen
Jeremy Stockmans
Reaz Usmanali
2016 – 2017
President:
Frank Mesicek
President-Elect:
Iain Hill
Secretary:
Aaron Besseling
Treasurer:
Allan Antcliffe
Board of Governors:
Robyn Ellis
Mark Long
George Menzies
Frank Mesicek
John Molnar
Mustafa Morsy
David Rasmussen
Reaz Usmanali
