In 1962, OHM Advisors began with a simple premise: to create extraordinary relationships with our clients.
Since our beginnings, we've understood that meeting the advisory needs of our clients starts with building their trust. For over 50 years, our goal has been to create honest client partnerships for today's challenges that last well into the future.
Relationships, Not Clients
In 1962, engineering veteran John E. Hiltz joined Melvin “Ernie” Orchard to form John E. Hiltz & Associates in Detroit, Michigan, with 15 employees. Their vision was a firm built on extraordinary relationships with municipal clients, providing insightful engineering counsel, and delivering on a promise to Advance Communities.
Over the years, John E. Hiltz & Associates became Orchard, Papke, Hiltz and McCliment, Inc., Orchard, Hiltz & McCliment, Inc., and then OHM Advisors; while continually growing and diversifying our team and offerings to become a full-service consulting firm.
Some of our growth has been through strategic mergers and acquisitions and some has been organic, but the driving force has always been to create an exceptional team of people committed to best serving our clients.
Close to 60 years later—with a 500+ team in three states—we’re still living our mission of Advancing Communities through our work with municipalities, state and regional agencies, schools, corporations, developers and local entities. We’ve grown our extraordinary relationships to become our clients’ trusted advisors, and continue to nurture those partnerships to endure for tomorrow's challenges.
OHM Advisors was founded to build relationships with people. You treat them in such a way that when you tell them something, they believe and have faith in what you’re telling them.
1962: Beginnings in Detroit, Michigan
John E. Hiltz, an engineer with more than 30 years of municipal engineering experience, joins forces with Melvin "Ernie" Orchard of Orchard Engineering, and Frank Papke and Dick Toal of Salle Engineering to form John E. Hiltz & Associates, Inc. The company starts in Detroit with 15 employees and serves as the consulting engineer for the City of Livonia, the beginning of a relationship that continues today.
1972: Name Change & New Headquarters
Founding partner John E. Hiltz retires and the firm changes its name to Orchard, Papke, Hiltz and McCliment, Inc. Co-founder Ernie Orchard becomes President and continues to develop our culture of acting as trusted advisors to our community clients. The firm moves to a new, larger building, and serves five major Michigan municipal clients still with us today: the cities of Livonia, Ypsilanti, and Farmington and the townships of Superior and Pontiac (now the City of Auburn Hills).
1984: Client Community & Technology Expansions
The firm expands to provide services for county road agencies and we complete our first projects for the Michigan Department of Transportation. We also delve into the new world of computer-aided drafting, launching a Structural Design Group focused on roadway infrastructure the following year.
1995: Robust Service Growth & Second Office Opening
Our second office in
2005: Merger Brings Architecture Expertise
The firm expands to Michigan's Upper Peninsula, joining forces with Hitch, Inc. of Houghton, Michigan. The merger brings new service offerings to our clients including architecture and mechanical and electrical engineering services. The office also extends our client community family to include K-12 schools, universities and the federal government.
2008: Nashville Office Opening Grows Firm Regionally
The opening of our Nashville, Tennessee location begins a future of successful professional relationships with the Tennessee Department of Transportation, the city of Nashville and many other cities and municipalities in the firm’s new service region.
2010: Merger Adds Planning & Landscape Architecture
Under the leadership of new President John J. Hiltz, we again expand our geographic reach and diversify our client service offerings through a merger with Columbus, Ohio-based Bird Houk Collaborative. The merger integrates our public-sector focused services to municipalities and agencies with Bird Houk’s architecture, planning, and urban design for both private and public sectors, beginning a new era for our firm as a full-service consultant across multiple (and growing) geographies.
2015: Firm Expands Further with Northeast Ohio Partnership
OHM Advisors merges with Krock Esser Engineering of Richland, Ohio, expanding the firm's reach to Northeast Ohio and integrating Krock Esser’s municipal engineering, construction management and private sector development services in that region. In addition to a new location, the firm gains a team of professionals that provides complementary services, has shared core values, and aligns with our firm's partnership vision.