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Thomas Dean & Hoskins, Inc. (TD&H) is a consulting engineering firm offering a diverse range of services throughout Montana, Washington, Idaho, North Dakota, and Pennsylvania. We serve a diverse clientele ranging from individuals and rural water districts to large corporations in populous cities. We assist our clients through all phases of their projects, starting with concept development through construction completion. TD&H has been satisfying clients since its incorporation in 1965 and has built an impressive resume of successful projects. TD&H strives to provide innovative engineering solutions to challenging technical problems by assigning professionals who understand the issues and deliver results. We place a high priority on service and measure our success in terms of each client’s success.

TD&H Engineering Questions

The TD&H Engineering annual revenue was $12.5 million in 2026.

Steve Marsh is the President and CEO of TD&H Engineering.

69 people are employed at TD&H Engineering.

TD&H Engineering is based in Great Falls, Montana.

The NAICS codes for TD&H Engineering are [5413, 541, 54, 54133].

The SIC codes for TD&H Engineering are [871, 87].

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