SESI Consulting Engineers

About

SESI was founded in 1976 by William (Bill) St. Pierre, father of our current president Michael St. Pierre. After working for a company that was not a good cultural fit, Bill started SESI out of his home alongside his wife. Bill did the soils work in the basement and then rented a single room in an office building in Wayne, NJ. Over the following 3 years, they began to expand after hiring Jay Adam in 1978. Working together, they won a large client just outside New York City. Soon after that, they hired Steve Byszewski, and the business began to expand rapidly. Currently, SESI has grown to over 100 employees and retired consultants who continue to support SESI and our growth.