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Meet the STPA Team

STPA technical team members come from a number of educational backgrounds, including chemical engineering, environmental engineering, material science, chemistry, biology, safety management and business administration. Some technical team members have previous work experience with other organizations which include engineering firms, private industry, and government and research firms.

Our Team

  • Emory H. Hull


  • Robert D. Bartholomew, P.E.


  • Ewa Labuda, Ph.D.

    Metallurgical Director

  • Gary H. Roberts, P.E.

    Staff Consultant

  • Stephen P. Donner, P.E.

    Staff Consultant

  • John W. McGraw

    Staff Consultant

  • Carl J. Feichtel

    Consulting Engineering Assistant

  • Dania J. Thompson

    Senior Chemist

  • Sidney Carter

    Metallurgical Laboratory Technologist

  • Jocelyn N. Fillmore


The Partnership arrangement established in 1958 continues to serve as the basis for the management and organizational structure of Sheppard T. Powell Associates, LLC (STPA). Consulting services are provided by Associates, Staff Consultants, Engineers, and Consulting Engineering Assistant. The Metallurgical Director is also available to provide consulting services. Comprehensive chemical and metallurgical services are provided by the laboratory.