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Veteran Owned Certified

Allison Park Office

2859 Oxford Blvd
Allison Park, PA 15101

412-486-0600

Franklin Office

191 Howard St Ste 108
Franklin, PA 16323

814-432-2167

Bellefonte Office

2022 Axemann Road Ste 201
Bellefonte, PA 16823

814-355-2241

© 2025 Letterle & Associates, Inc. All Rights Reserved.
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      Lou is the owner and founder of Letterle & Associates. As President and CEO, Lou ensures that the resources needed to complete each project are available and dedicated. He achieves this by setting corporate priorities and committing experienced scientists and engineers to achieve those priorities. He is also responsible for providing the necessary funding to finance each project in order to eliminate delays and inconvenience to the client. Prior to forming Letterle & Associates in 1998, Lou worked for several other environmental consulting firms in western Pennsylvania, with responsibilities ranging
      Lou is the owner and founder of Letterle & Associates. As President and CEO, Lou ensures that the resources needed to complete each project are available and dedicated. He achieves this by setting corporate priorities and committing experienced scientists and engineers to achieve those priorities. He is also responsible for providing the necessary funding to finance each project in order to eliminate delays and inconvenience to the client. Prior to forming Letterle & Associates in 1998, Lou worked for several other environmental consulting firms in western Pennsylvania, with responsibilities ranging