Member Directory

Allgeier, Martin and Associates, Inc. is an established Consulting Engineering firm providing electrical engineering, civil engineering, surveying and related services throughout the Midwest since 1954.

We create inspiring, high performance buildings for diverse clients to enhance the global community.

The letters ‘G’ and ‘B’ stand for Gaddie and Branch which are the first names of the founders children; and the motivation behind GB Engineering. The future of the world is in the next generation, and as cliché as it sounds, the construction industry and the process by which we envision, design, and build projects is changing faster than ever before in history; and we should be considering the legacy we are leaving behind with our projects.

All land development projects are unique, with each location having its own distinctive design challenges and local regulations. By taking a creative approach using conventional civil engineering practices, we can, and have numerous times, come up with simple solutions to challenging situations.

We are a multidisciplinary professional services firm with the experience and capability to serve a wide variety of clients throughout the United States.
Founded in 1933 in St. Louis, H&S has grown to offer services to meet the ever-changing needs of our clients and to keep ahead of technological developments in the field of engineering.

We offer professional services in all phases of a project, from feasibility planning and development, funding application assistance, land survey and 3D scanning, and environmental planning, to engineering design and construction administration, as well as GIS mapping services. Our projects are managed in a way that allows for thorough review by senior-level staff, no matter the size of the project. H&S has demonstrated innovative design on numerous projects, receiving recognition in the form of professional awards and repeat assignments from 80% of our clients.

As a 100% employee-owned firm, every staff member has a personal vested interest in completing work to the satisfaction of our clients. These reasons and more make Horner & Shifrin the Right Choice for any project.

We’re Olsson, a nationally-recognized, employee-owned engineering and design firm with a rich history of success. Founded in 1956 on the very mindset that drives us today, we exist to improve communities, like yours, making it more sustainable, better connected, and more efficient. Simply put, we exist to leave the world better than we found it. 

Though our philosophy hasn’t changed since John E. Olsson opened our doors many years ago, we have certainly evolved, adding dozens of offices across eight states and developing a comprehensive list of services to best serve a comprehensive list of markets. We achieved Top 100 engineering firm status in 2018 (No. 98 on Engineering News-Record’s Top 500 Design Firms national list), proving that tenacity, teamwork and a philanthropic mindset is indeed a winning combination. 

Years Established and Former Names

Established in 1956, Olsson became an employee-owned corporation on October 1, 1970. Previous firm names include John E. Olsson (3/9/1956); Olsson & Burroughs (1958); Clark, Enersen, Olsson, Burroughs, & Thomsen (1962); John E. Olsson & Associates (10/2/1970); and Olsson Associates, Inc. (11/1/1973).

Type of Services Qualified to Perform
and Assistance Expected

Team based and purpose driven, we have more than 1,100 team members in nearly 30 offices across eight states and offer a comprehensive list of services: planning & design, engineering, field services, environmental and technology.

Prairie Engineers brings innovation and excellence to every project. Trust us for comprehensive design solutions that elevate your vision to reality. We provide civil, structural, mechanical, and plumbing engineering, as well as surveying, mapping, and natural resources management,