History

Through hard work, honesty and commitment, my family has lived the promise of the American dream. My great grandfather came to the United States and started out as a boiler room engineer in New York City, a skilled tradesmen. My grandfather worked in the engineering and construction business on prominent heavy civil projects, and my father started the company which bears our name. Tiernan & Patrylo’s reputation for honesty, integrity and quality work has been the key to our success story, and today remains at the core of our business philosophy.Tiernan & Patrylo is moving into its fourth decade in the engineering and construction industry. Founded by partners and fellow engineers Jack Tiernan and Dennis Patrylo in 1984, the company’s early success was fueled by hard work and ingenuity. Often called upon to take on difficult technical challenges that other companies try to avoid, those early successes are still paying dividends.