Infrastructure Solutions Group, LLC provides engineering design, construction management, and design-build services for civil, environmental, transportation, bridge, and development projects. We are equally skilled at identifying the engineering needs of both public and private sector clients, and present solutions that address each client’s unique set of circumstances. ISG is committed to your project’s success from inception to completion.

The Three Pillars of our reputation

Since 1943, Infrastructure Solutions Group, LLC has built its reputation on three core principles: 1. Quality Engineering, 2. Excellent Customer Service, and 3. Efficiency. We apply these three pillars of our reputation on each project we handle.


Quality Engineering

Each step of our planning and design process – including calculations, computer runs, preliminary reports, plan sheets and specifications – is thoroughly checked by a team of registered professional engineers.


Excellent Customer Service

We believe communication is vital to the success of any project. Infrastructure Solution Group prides itself on the personal involvement of its officers and project managers on each project to conquer the challenges and achieve the project objectives in a timely manner.



We have a proven history of performance in the design, management, construction and inspection of roadway, bridge, drainage, water, and wastewater infrastructure projects and have experienced personnel to complete them successfully.

ABout ISG Engineering

Infrastructure Solutions Group has been providing professional engineering services for clients since 1943. Our company currently maintains three offices in Oklahoma City, Tulsa, and McAlester, OK.

The staff of Infrastructure Solutions Group includes a total of 50 professional, technical, and support personnel. Although our company provides multi-discipline engineering services to industrial and commercial clients, the strength of our firm and the majority of experience is in the planning and design of Governmental Public Works Projects, and Transportation/Bridge Projects.

Infrastructure Solutions Group provides quality engineering services to a number of municipalities, water districts and industrial clients. These services include the design and construction management of…

  • Industrial buildings / water and wastewater treatment
  • Water supply treatment and distribution
  • Site design and storm water management
  • Vehicular and pedestrian transportation facilities
  • Wastewater treatment and collection
  • Wastewater lift stations
  • Water transmission facilities
  • Water treatment facilities
  • Booster pump stations
  • Storm water systems
  • Storm water pump stations
  • Solid waste facilities
  • Water distribution systems
  • Wastewater collection system rehabilitation
  • Railroad Transportation
  • Transportation
  • Bridges

The planning, design, and project management capability of Infrastructure Solutions Group is enhanced by extensive use of computer technology. Infrastructure Solutions Group computer facilities include multiple high speed servers with Branch to Branch interconnect, desktop and laptop computers.  Our reproduction ability is enhanced by high-speed wide format printers, black-and-white copiers and color printers and plotters.

Financial Experience

Infrastructure Solutions Group prides itself on a thorough knowledge of project funding and financial processes. This understanding allows our company to assist the client in obtaining financial aid from numerous agencies or programs that provide grants or loans to serve clients. Infrastructure Solutions Group has successfully obtained funding from state and federal agencies including Oklahoma Water Resources Board, Oklahoma Department of Commerce, and United States Development of Agriculture – Rural Development, United States Department of Housing and Urban Development, and the Oklahoma Department of Transportation.

Project Management and Quality Control

The primary goal of Infrastructure Solutions Group is to provide each client with a quality engineering service that results in projects delivered within the client’s schedule and budget. The capacity and capability of any professional service organization to provide its clients with quality and timely performance is dependent upon the firm’s management, the number of personnel available, and the qualifications of the personnel. The management of Infrastructure Solutions Group is committed to the satisfaction of our clients and providing a professional service that will keep those clients returning to Infrastructure Solutions Group for future projects.

With the number of personnel on staff, the firm has the ability to meet the planning and design needs of our clients. Infrastructure Solutions Group has demonstrated this commitment with 90% of our base workload being repeat business. The number of projects currently under design and construction and those completed along with the firm’s number of repeat clients is the best indication of any firm’s reputation for completing projects within the time and budget. We invite you to contact any of the Owner/Client references listed to inquire about Infrastructure Solutions Group and its personnel.

Infrastructure Solutions Group is committed to performing quality planning and engineering services to the firm’s clients. Infrastructure Solutions Group carries professional liability insurance. Each step of the planning/design process including calculations, computer runs, preliminary reports, plan sheets, and specifications is thoroughly checked by a registered Professional Engineer.

Infrastructure Solutions Group commitment to adhering to a quality control plan for project planning and design is indicative of the firm’s policy of providing the highest quality engineering services. Infrastructure Solutions Group is and will continue to meet the highest professional engineering standards.

Project Team

A team of professional engineers and support personnel are assembled for each project and are available on an as needed basis. Infrastructure Solutions Group policy requires the involvement of two (2) engineers on all projects. The two engineers will be working members of the project team. The policy assures the client prompt response and availability for the duration of any given project.