(228) 864-6289 

  • Civil and Structural Engineering
  • Feasibility Studies
  • Investigations
  • Project Inspections
  • Expert Testimony

Welcome to Simpkins & Costelli, Inc.

Simpkins & Costelli, Inc. is an experienced professional engineering firm that has served the Mississippi Gulf Coast since 1973. Specializing in the fields of civil and structural engineering design, our portfolio includes project management and construction administration.

Our services include: structural engineering for pile-supported concrete wharf construction, tied-back steel or concrete bulkheads, warehousing,structural repairs for existing wharves; design of foundation and superstructure for commercial, industrial and institutional buildings; municipal and industrial water and wastewater treatment facilities; and civil site work including drainage, utilities, pavement and stormwater control for commercial, industrial or residential subdivisions.

Our expertise is sought after by public and private clients, including industries, municipalities, and state and federal governments. Since our founding, Simpkins & Costelli, Inc. has provided professional consulting engineering services in the field of civil and structural engineering, feasibility studies, investigations, project Inspections and expert testimony.  We also offer consulting services to Architects and Engineers.

Our team

Madeline Costelli Pettry, P.E.
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Michael R. Costelli, P.E.
Vice President
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David P. LeBlanc, P.E.
Construction Engineer
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Taylor Jakins
CADD Operator

Rick Strickland
CADD Operator
engineers without borders

Simpkins & Costelli, Inc. and its team members Michael Costelli and Maddie Pettry have been actively involved with Engineers Without Borders since 2010. Projects include the design and construction of a concrete masonry school building in Togo, Africa from 2010-2014 with the Ole Miss Student Chapter of Engineers Without Borders and the design and construction of a steel suspension bridge in Boca de Cuiria, Panama from 2014-present with the Mississippi Gulf Coast Professional Chapter of Engineers Without Borders. Several trips have been made to assess and construct each project. It is our goal at Simpkins & Costelli, Inc. to do our best to serve not only our community, but fulfill engineering needs in remote locations of the world.

Company Office
401 32 1/2 Street
Gulfport, MS 39506
Email: info@simpkins-costelli.com
Telephone: 228.864.6289
Fax Line: 228.864.2897