Our Team

Meet the Criterium-Jansen Engineers

Our Criterium-Jansen team is dedicated to enhancing peoples’ lives through improved understanding and performance of the buildings in which they work and live.

Committed to being the leading provider of investigative and diagnostic engineering services for commercial, residential, and condo buildings, our enthusiastic and talented team looks forward to working with you.

Get to know our engineering and management teams below:

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Henry Jansen
Professional Engineer, ACCI, President, Owner

Henry J. Jansen, P.Eng., ACCI is president and owner of Criterium-Jansen Engineers. Henry started his office in 2007.

“There are 2 things that people will always need: food and shelter. Criterium-Jansen Engineers is in the shelter business.”

Henry graduated from McMaster University in 1992 and earned his P.Eng. license in 1994. He has always been a design engineer helping to solve problems. Engineering is applied science. Engineers use theory and then apply practical knowledge to develop solutions. As his career moved to business ownership, he partnered with Criterium Engineers as one of the building engineering leaders in North America.

Henry loves to help clients with their building needs and has developed strong industry leaders to meet the demands of our residential, commercial, and condominium clients. Criterium-Jansen Engineers is a family team.

Henry is currently on the Board of Directors for CCI-Grand River and Greater Dufferin Home Builders Association; is a proud member of the ACMO Associates Committee and Guelph and District Home Builders Association; and is a contributor to the PEO Performance Audit and Reserve Fund Committee. Henry also chairs the Annual Industry Luncheon for Greater Dufferin.

In his spare time, Henry enjoys spending time with family, renovating his home, and camping.

Marilyn Jansen

Marilyn Jansen
Office Manager, Owner

Marilyn has been with Criterium-Jansen Engineers since it was founded in 2007. As the Office Manager, she organizes and coordinates the office operations and procedures in order to ensure effectiveness and efficiency.

Marilyn takes care of finances and accounting, marketing, arranges for networking events/conferences, explores new venues for advertising the firm’s services and expertise, ensures proper organization and communication, and that the overall office environment is running smoothly.

“Criterium-Jansen Engineers is a like a family – we work together, we support each other, we laugh together! We are a group of people who want to work and partner with our clients to help them answer the tough questions and make sound decisions.”

In her spare time Marilyn likes to be spend time with family, go camping, read, and bake.


Jim Rammos
Professional Engineer, EEEI, Director of Building Science & Restoration

Jim graduated from Ryerson University in 1991 and from the University of Toronto in 1993, and earned his P.Eng. license in 1995. Jim is a Senior Building Science Engineer and has 25 years of work experience in building science, thermographic scanning, mechanical and electrical engineering, new and restoration construction, and related environments. He possesses skills that give clients a sound understanding of all aspects of the building science umbrella, including building envelope investigations and assessments, reserve fund studies, mechanical and electrical systems design and assessments, due diligence, and building evaluation for real estate transactions.

Jim is a Certified Thermographer, a member of OACHI (Ontario Association of Certified Home Inspectors) and has his BCIN.

In his spare time, Jim is a hockey coach for a local team, he enjoys spending time with family, classic car restoration, and camping.


Jaime Rodriguez
B.Tech. Arch.Sc., C.E.T., RRO, Senior Project Manager – Building Sciences

Jaime joined Criterium–Jansen Engineers in the Spring of 2021. Jaime Rodríguez is a Certified Engineering Technologist and a graduate of Ryerson University with over 20 years of experience in the consulting industry specializing in building envelope engineering.

Jaime is primarily engaged in project management, condition assessments and building science/engineering design for the Building Science Engineering Team. He enjoys connecting with people in the industry and remaining informed about construction technology so that projects are up to date with the latest innovations. Jaime’s approach has always been hands-on, and he is not afraid to get his hands dirty.

As part of his enthusiasm for technology, Jaime is a consummate audiophile, always chasing the latest trends in equipment to enjoy music reproduction in the highest resolution sound.


Sheldon Peeters
P.E.Y Co-Op (Professional Experience Year Co-Op) University of Toronto

Sheldon began working for Criterium-Jansen Engineers in September of 2020 and is taking a professional year off of school to gain more experience in his field. He is studying Civil Engineering at the University of Toronto and is excited to learn more about Building Science.

Sheldon has always been fascinated with engineering and construction, seeing the rapid urban expansion of the GTA and its influence on rural communities. He is passionate about sustainable and equitable design in the construction industry, and the issue of gentrification in the urban core.

In his spare time, Sheldon enjoys watching the NBA, exercising, and beating people at Super Smash Bros.

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Michael Aresta
Professional Engineer, Director of Building Engineering & Architectural Design

Mike has been with Criterium – Jansen Engineers since the Spring of 2015. His specialty is in structural design – focussing on specialized engineering and construction techniques to provide outstanding solutions and projects. Mike has the ability to quickly address and resolve issues and keep the project moving.

Mike has always had a fascination for buildings, and Criterium – Jansen Engineers is a company whose specialty is buildings. As a result, Criterium – Jansen Engineers has allowed him to pursue his passion and has given him a great opportunity to get his engineering career off on the right foot!

Now here’s something not everyone can do – Mike can bench press 260 pounds!! Hmmm…how many 2×4’s is that?


Suja John
Professional Engineer, FEC, Senior Structural Engineer

Suja has been a part of the Criterium – Jansen Engineers Team since Spring of 2016. Being a Structural Engineer allows her to fully focus on her specialty as she assists clients with multiple structural queries in the buildings she inspects.

Suja loves being part of the team that makes up Criterium – Jansen Engineers where we are able to bounce ideas off each other and work together to meet deadlines. She really enjoys the variety of work as it challenges her.

Fun thing to note about Suja is that she lived and worked in Singapore and the Middle East before making Canada home several years ago. Once in Canada, she worked with another consultancy and in the steel industry before joining Criterium – Jansen Engineers.

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Mike Coleman
ATPS, Architectural Technician Project Specialist

Mike Coleman has been with Criterium-Jansen Engineers since April 2018. Mike has always been passionate about the building trade and expanded his skills by obtaining an Architectural Technician Diploma from Sheridan College. Mike’s background includes being a carpenter working within the residential construction industry as well as Architectural Design while working for an Architect.

Mike loves to stay current on building science as it constantly evolves and uses that knowledge to help clients achieve a quality solution for their design requirements. Having a keen eye and a sharp attention to detail help create innovative and flexible solutions.

On a personal note, Mike is passionate about nature and the environment and loves to escape into cottage country when possible.


Parker Bowie
Architectural Technologist

Parker joined the Criterium – Jansen Engineers Team in September 2020. He started his journey in the building field by graduating from the Architectural Technologist program at Algonquin College in 2014. Since then (and a few years before that), he has gained multiple years in experience working hands on as a carpenter, learning how the trade works before stepping into the office atmosphere as a Technologist.

Parker enjoys the problem-solving aspect of his job, from designing the wall placement to ensure proper flow of a building, to refining the details on how exactly something can be constructed. He helps friends and family with home renovations to stay up on his skills.

Parker tries to stay active while not at work by juggling all of his favourite hobbies. While never afraid to take on a new challenge, some activities he enjoys are hockey, golf, fishing, hiking, camping, and the list goes on.


Tammy Hoving
Administrative Assistant

Tammy joined Criterium-Jansen Engineers in August 2016 as the Administrative Assistant support for the engineers and clients. A variety of tasks include communicating with the clients, recording job information, filing, editing and printing projects for clients.

She loves working at Criterium-Jansen Engineers because of the fun, friendly, family-like atmosphere.

Some fun facts about her is in her spare time she likes playing Candy Crush and Soda Crush and she loves to watch movies with her kids (especially Marvel movies!).

Contact Criterium-Jansen

To learn more about the Criterium-Jansen team, please visit our Qualifications page or contact us today at 1-888-940-0571.