LEHDER Principals

The LEHDER company name is pronounced LEADER and comes from the surnames of the founders. The name was selected to reflect our commitment to being an innovative leader in consulting services. LEHDER founders: Sid Lethbridge, Des Hayles, Michael Denomme and Mark Roehler. There are now seven Principals including Peter Pakalnis, Marnie Freer and Penny McInnis.

LEHDER Principals

Sid Lethbridge

Principal Emeritus

Mr. Lethbridge is a Chemical Engineer with over thirty years of experience in environmental management and chemical process development. He has managed and conducted projects for emission inventory development, air dispersion modeling studies, industrial site assessments, site remediation, environmental audits, preparation of permit applications and facilitation of the approval process in Ontario, Quebec and Alberta, development of air pollution control equipment, odor evaluation studies of industrial plants and acquisition and divestiture due diligence programs. He was a major contributor to a chemical research and development program which culminated in the construction and commissioning of a commercial foam insulation product.

Des Hayles

Principal

Mr. Hayles is a professional engineer with over twenty years of experience in environmental engineering and IT technology. He has managed environmental projects in several areas including site remediation, process development for pollution control equipment design and construction, environmental compliance audits, site and facility audits for acquisition and divestiture due diligence programs and development of environmental management systems and permit development for operations in Ontario, Quebec and Alberta.

Michael Denomme, QSTI

Principal

LEHDER President, Mr. Denomme, has over thirty years of experience in the environmental management field. His experience includes environmental audits, source and emission inventories, dispersion modeling and the acquisition of facility operating permits. He has notable and extensive technical expertise in industrial source emission testing and has directed and managed hundreds of stack sampling projects at industrial locations throughout North America.

Mark Roehler

Principal

Mr. Roehler has over thirty years of experience in environmental management and chemical research and development. The projects he has managed and conducted include environmental stewardship, industrial site assessments, source emission surveys, personal and area exposure sampling, environmental audits, WHMIS, Material Safety Data Sheets and transportation regulations for dangerous goods and wastes. Mr. Roehler has developed and taught environmental courses at the request of Lambton College in Sarnia, Ontario and the Centre for Health Environment & Safety (CHES) in London, Ontario.

Peter Pakalnis, QSTI

Principal

Mr. Pakalnis is an Environmental Technologist with twenty years of experience in the source testing field. Peter has managed and conducted hundreds of stack monitoring programs in numerous industrial sectors for both compliance and process testing purposes. Peter also has vast experience in conducting CEMS RATA's. Between 1996 and 2010, Peter has been teaching the stack monitoring portion of the sixth semester ENVR 5006 air monitoring course at Fanshawe College in London, Ontario. Peter is also a Qualified Source Testing Individual (QSTI) for Groups I and III.

Marnie Freer

Principal

Mrs. Freer has fifteen years of environmental consulting and project management experience. She is a member of the Modeling Practitioner Group providing technical input to the MOECC for the implementation of O. Reg. 419. She has managed and conducted projects including emission inventory development, air dispersion modelling and air approvals, population and implementation of database systems, creation of algorithms for MSDS authoring software, TDG and WHMIS training programs and workplace exposure monitoring.

Penny McInnis

Principal

Mrs. McInnis is an Environmental Engineer with over fifteen years of experience in environmental consulting, advanced dispersion modeling and project management. The projects Penny has managed and conducted include regional air quality studies, emission inventory development, industrial air dispersion modeling studies, industrial site assessments, site remediation, environmental audits, permit applications and facilitation of the approval process in Ontario and Alberta. Penny is the Technical Lead for Air Dispersion Modeling at LEHDER.