Sean Callahan

Sean Callahan is a professional engineer with 25 years of diversified civil engineering and land development experience. His responsibilities include civil engineering design for the reconstruction of roadways, storm drainage systems, stream restorations, and
site development projects for various clients including local villages, schools, and private utility companies. Mr. Callahan has extensive experience with stormwater management projects.

Typical responsibilities include:
• Design of stormwater conveyance, detention, retention, and infiltration systems
consistent with Federal EPA and NYS DEC Green Infrastructure regulations.
• Stormwater modeling of large watersheds and municipal drainage systems utilizing
Bentley SewerGEMS V8i software.
• Analysis and design of municipal drainage systems.
• Assessment of storm damage to storm water management systems.