ST. LOUIS — Eric Stegmann, biologist, recently joined Hanson Professional Services Inc.’s St. Louis office. He will conduct wetland delineations, water quality and habitat assessments and threatened and endangered species surveys for power, industry, rail and airport clients. He also will help obtain Clean Water Act permits, including Section 404 permits and Section 401 water quality certifications.

Prior to joining the company, Stegmann was an aquatic biologist/malacologist for an ecological consultant in O’Fallon. He received a bachelor’s degree in wildlife biology and a master’s degree in biology, both from Missouri State University.

Hanson is a national, employee-owned consulting firm providing engineering, planning and allied services. The St. Louis office is located at 600 Washington Ave., Suite 950, St. Louis, MO 63101. The office may be reached by phone at (314) 770-0467.