Mathieu is a construction engineer, with over 15 years’ experience in the design, construction, management and commissioning of urban, rural and industrial infrastructure for environmental purposes. As an advocate for sustainable development, he has cultivated strong technical expertise in the fields of soil, water and air, as well as in waste management. He has been involved with the construction of several roads, composting plants, recycling centres and several projects related to water management and treatment. He has also participated in the rehabilitation of contaminated sites, mainly those of former mines.
In addition, Mathieu has been actively involved in the success of environmental companies, notably ENV Consultants, which he co-founded. In this capacity he managed human resources, finances, legal affairs, administration and development.
Since 2014, Mathieu has been a member of the board of directors of the not-for-profit organization Dysphasie-Estrie. He is currently the vice-chair and sits on several committees of the organization.
Mathieu joined Trans Canada Trail in July 2017.