Our Management Team
Patrick Usereau is the owner and President of Sedexlab inc., materials testing laboratory and consulting firm, which he founded in 1999. As a registered Quebec Geologist, he has 20 years of experience in the field of expansive reactions related to iron-sulfide-containing aggregates, overseeing over 20,000 building assessments related to pyrite and pyrrhotite-bearing aggregate used in the residential and commercial construction industry. Over the past years, Patrick has overseen petrographic examinations on more than 1000 concrete cores sampled from building foundations at risk with concrete deterioration related to pyrrhotite-bearing coarse aggregate. Moreover, his extensive background has enabled him to build a highly skilled and effective team of petrographers and technicians.
As President, Patrick is responsible for the leadership of the company, marketing efforts and business strategies. He works closely with the Project Managers on contracting, budgets, client satisfaction and quality control. Being the leader of a small business Patrick finds himself relying on his varied skills to complete a wide range of tasks. He succeeds in facilitating a team environment that empowers his employees resulting in the successful operation of the company.
Pascal is a professional geologist and a member of the Ordre des géologues du Québec (OGQ member #1414). He joined the firm Sedexlab in 2007.
Pascal has performed thousands of microscopic examinations on aggregates, concrete, and materials potentially containing asbestos.
He is our go-to expert in optical mineralogy and microscopy and plays a key role in the identification and quantification of pyrrhotite and other iron sulfides.
As Director of Operations, Pascal has ensured and monitored quality on various materials testing projects, ranging from residential investigations related to pyrrhotite to asbestos studies in industrial settings. Pascal has overseen thousands of evaluations related to pyrite and was instrumental in developing our pyrrhotite expertise division in 2013.
He demonstrates daily his ability to excel in a fast-paced and ever-changing environment.
Ryan joined Sedexlab in 2005. He has been a Field Manager since 2008 and is certified as an asbestos inspector by ATC Group Services. His expertise lies mainly in the areas of inspection and sampling techniques for the purpose of material testing and laboratory analysis.