Evans-Graves Engineers Inc

The Sigma Consulting Group is a full-service business that provides a range of engineering services. It serves federal, municipal, state, industrial and private clients in the southern Gulf Coast. The privately owned company operates in Louisiana and Florida. Incorporated in 1987, the Sigma Consulting Group also offers surveying, planning and transportation solutions. It has a staff of more than 30 individuals. In addition, the company undertakes projects for Williams Travel Centers, Cox Communications and Pennington Dam. The Sigma Consulting Group is recognized as an Indian Owned Business by the federal government. It also provides construction administration and wastewater engineering services.

Duplantis Design Group, also known as DDG, offers civil engineering, architectural and surveying services. It undertakes projects for office buildings, retail centers, health care and recreational facilities, educational institutions and restaurants. The company offers programming, building design, space planning, bidding, permitting and construction observation services. Duplantis Design Group also provides cost estimation, roof evaluation and assessment solutions. The company is affiliated with the American Institute of Architects, National Council of Architectural Registration Boards, American Society of Civil Engineers, American Council of Engineering Consultants, Louisiana Engineering Society and National Society of Professional Engineers. It additionally offers site investigation, due diligence coordination, zoning, drainage study, highway improvement and land use planning solutions. Duplantis Design Group maintains its corporate office in Thibodaux, La.