About Us

Meet The Founders

Mark Lai

Mark Lai


Mark Lai is a gifted visionary and he takes pride in creating a company where employees are proud to work.  Mark is well known throughout Canada and abroad for his expertise on asbestos and his ability to provide practical solutions to the challenges faced in managing hazardous materials in buildings.  Mark has a proven track record spanning more than 25 years in environmental consulting and has supervised some of the largest hazardous materials abatement projects in Canada.  Mark is a passionate presenter / trainer and has fostered long-term business relationships both nationally and internationally, resulting in access to countless resources and contacts, ensuring ECOH’s success with projects of practically any magnitude.

Dr. Om Malik, Ph.D, P.Eng., CIH, ROH, FAIHA, QP

Dr. Om Malik, Ph.D, P.Eng., CIH, ROH, FAIHA, QP

CEO & Principal

Om Malik is an internationally recognized expert with more than 40 years’ experience in environmental health and industrial hygiene. Prior to co-founding ECOH, he held senior positions with the Ontario Ministry of Labour, where he directed the control of hazardous materials in industries across the province. An expert in occupational health risk assessment, air quality sampling, and control of asbestos, mould and infectious materials, he has led development of international health and safety conventions as Chair of an International Labour Organization subcommittee representing over 100 countries. A recipient of the Hugh Nelson award for excellence in industrial hygiene, Om is an engaging and sought-after public speaker and expert witness. He has been an adjunct Professor of Industrial Hygiene at the University of Toronto, has been named a distinguished Fellow of the American Industrial Hygiene Association and is designated a Qualified Person for Risk Assessment (QPRA) by the Ontario Ministry of the Environment.

John Lewis, BA, CET

John Lewis, BA, CET


John Lewis is a co-founder of ECOH with over 25 years of senior environmental consulting experience. A recognized expert in all phases of Environmental Site Assessments, contaminant hydrogeology, site decommissioning, and computer modelling. John has managed dozens of large-scale environmental remediation and construction projects including site decommissioning, landfill leachate monitoring, hydrogeology, and site-specific risk assessments.

Our Story

Our name “ECOH” was inspired by a canoe trip in the Fall of 2003.  A thick mist had blanketed the entire lake where we had camped one night in Algonquin Park.  Standing on the shore in the early morning, feeling a little unnerved by the thickness of the mist, I called out to my canoeing buddies to come and look.  A repeating echo bounced back so clearly that we couldn’t help but take turns calling out to the loons across the lake and laughing.  It was one of those quintessential Canadian experiences –awed by the wilderness and humbled by the beauty – that left an indelible mark.  It was clearly in mind a few days later when John, Om and I were toying around with various acronyms to better reflect our combined services – Environmental Consulting & Occupational Health. We agreed that “E C O H” as an acronym had potential, but it wasn’t until my wife Shelley designed a logo to capture the look of sound waves, that we knew ECOH would be our new look and name. In business since 2000, known as ECOH since 2003. 

Mark Lai, President


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Visit Us

Mississauga Office: 75 Courtneypark Drive West,
Unit #1, Mississauga, ON L5W 0E3

Ottawa Office: 666 Kirkwood Avenue,
Unit 100, Ottawa, ON K1Z 5X9

Call Us

Mississauga - O: 905.795.2800
TF: 1.866.231.6855
Ottawa - O: 613.699.2295
TF: 1.866.231.6855

Email Us

General Inquiries: info@ecoh.ca
Careers: resumes@ecoh.ca
Seminars: learning@ecoh.ca

Contact Us