The Sigma Team

Louisiana Offices

Miles B. Williams, P.E. - President

Miles is currently President and Co-Owner of Sigma and is responsible for administration, client relations and general project oversight. He is a Professional Civil Engineer licensed in Louisiana. Miles is a 1983 graduate of LSU with a B.S. in Civil Engineering. His professional experience is specialized in highway design and wastewater collection design. Miles currently serves an appointment to the Louisiana Professional Engineering and Land Surveying Board.

Stephen J. Brasuell, P.E. - Director

Steve is a Co-Owner and Director for Sigma. He is a Professional Civil Engineer licensed in Louisiana and Oklahoma. Steve is a 1975 graduate of LSU with a B.S. in Civil Engineering. He is a civil/structural engineer specializing in industrial structural applications.

M. Gregory Breaux, P.E., P.L.S. - Vice-President

Greg is the Chief Land Surveyor for Sigma. He is a Professional Civil Engineer licensed in Louisiana and Professional Land Surveyor licensed in Louisiana and Mississippi. He is a 1972 graduate of LSU with a B.S. in Civil Engineering. Greg is responsible for subdivision development, boundary and topographic surveying, construction stakeout and site development for Sigma.

Gregory P. Sepeda, P.E. - Chief Engineer

Greg is a civil/structural engineer and serves as Chief Engineer for Sigma. He is responsible for all technical aspects and risk management within Sigma. He is a Professional Civil Engineer licensed in Louisiana, Florida, and Mississippi. He is a graduate of LSU with a B.S. (1990) and M.S. (2002) in Civil Engineering. Greg has a broad engineering background which includes structural design, bridge design, highway design, hydraulics, hydrology and site development.

Robert J. Lear, P.E., L.S.I. - Project Manager

Robbie is a project manager for Sigma. He is a Professional Civil Engineer licensed in Louisiana, and a Land Surveyor Intern in Louisiana. He is a 1996 graduate of LSU with a B.S. in Civil Engineering. Robbie has a diverse engineering and surveying background including highway design, topographic surveying and mapping, GPS control surveying, mapping and modeling, site development, bridge analysis/rating, and environmental permitting.

Jason L. Crain, P.E. - Project Manager

Jason is a project manager for Sigma. He is a Professional Civil Engineer licensed in Louisiana and Mississippi. He is a 1998 graduate of LSU with a B.S. in Civil Engineering. Jason has an extensive background in hydraulics/hydrology, sewer collection design and analysis, floodplain and drainage impact studies, highway design and traffic analysis.

Florida Office

Michael N. Dooley, P.E., MBA - Director

Mike is the founder and Co-Owner of Sigma, and Director of Florida Operations. He is a Professional Civil and Environmental Engineer licensed in Louisiana and Florida. He is a 1974 graduate of LSU with a B.S. in Civil Engineering and a 1980 MBA graduate of Arizona State. He is a civil/structural engineer specializing in bridge design.

Jason L. Lashley, P.E. - Project Manager

Jason is a project manager for Sigma. He is a Professional Civil Engineer licensed in Florida, Alabama and Mississippi. He is a 1996 graduate of University of Florida with a B.S. in Environmental Engineering. Jason has a diverse engineering background in hydraulics/hydrology, drainage design, site development, solid waste, environmental permitting and construction management.

David S. Lamar, P.E. - Project Manager

David is a Professional Civil Engineering licensed in Florida & Alabama. He holds a M.S. in Construction Engineering from the University of Florida (1980) and a B.S. in Civil Engineering from Auburn University (1973). David provides vast experience in various services performed for private, public and institutional clients in Escambia & Santa Rosa Counties; Projects include: office, retail, restaurants, banking, recreational and warehouse; educational facilities; residential subdivisions, townhomes and multi-family condominiums; military including: office, warehouse and fire training.


Sigma takes pride in its technical staff, which is represented by our low turnover rate and high quality services. Our CADD specialists are trained in the latest versions of AutoDesk Land Development Desktop / Civil 3D, the primary software used by Sigma for civil design. We also have technicians trained in Microstation, ArcGIS and XP-SWMM modeling software. We take special efforts to ensure that our staff has the tools to efficiently perform their jobs, which in turn provides our clients with unrivaled quality, on time and within budget.