Carnegie Mellon University. Department of Civil and Environmental Engineering.

• Duquesne Light Company Professor (7/2014 – present)
• Professor (7/08 to present)
• Associate Professor (7/05 to 7/08)
• Assistant Professor (7/99 to 7/05)
• Director, Center for Water Quality in Urban Environmental Systems (2008-present)

Northwestern University. Department of Civil Engineering.

• Visiting Assistant Professor (9/98 to 6/99)

Department of Energy. Center for Risk Excellence at Argonne National Laboratory.

• Environmental Engineering Intern, GS-11 (6/98 to 8/98)

Evanston Township High School in IL.

• Science Teacher (physics and chemistry) (9/91 to 6/92)

Waverly Junior-Senior High School in NY.

• Chemistry Teacher (9/90 to 8/91)