About Us


Allen Henderson and Associates, Inc. is a consulting firm providing specialized civil and structural engineering services. The firm was founded in 1976 by Allen Henderson and is located in Springfield, Illinois. In 2012, the firm merged with Arnold Engineering, Inc. of Waukee, Iowa to further enhance structural engineering expertise. Our areas of specialization include:

  • Transportation: Bridges and Roadways
  • Buildings and Facilities
  • Commercial and Residential Site Development

Since 1976, the professional and dedicated team at Allen Henderson and Associates, Inc. has been focused on working with public and private sector clients to provide innovative, cost effective and timely solutions to their vital projects. With this continued focus today, we look forward to meeting your needs and goals on your next project.