Corporate Headquarters

Founded in 1981, Gewalt Hamilton Associates, Inc. (GHA) offers a diverse range of professional engineering, surveying, planning, environmental, and geographic information services. We are committed to providing superior client service with professionalism, integrity, dedication, and vision - every project, every client, every time.

This commitment, combined with finding and retaining talented staff, allows us to develop and maintain long-term positive relationships with both our clients and regulatory officials. GHA represents a diverse group of clients that include municipalities, county and state agencies, utility companies, school districts, hospitals, community colleges, park districts, senior care facilities, commercial and residential developers.

In an industry rapidly evolving through continuous technological advances and a renewed commitment to sustainability, GHA strives to remain at the forefront. We excel at complex assignments that require both engineering expertise and creativity. We are driven to produce innovative designs that balance project function, economics and environmental sustainability while achieving client goals and meeting regulatory requirements.


IAEP Corporate Membership



Available to corporations, foundations, educational institutions, government agencies, trade groups, and other organizations supporting the environmental profession and have one or more employees or principals who meet the requirements of General Membership. Corporate Members receive all the benefits of membership. In addition, the Corporate Member receives:

  • A General Membership for one of its qualified staff members;
  • Attendance at Seminars for up to five staff members at the Membership Rate;
  • Allowed to post job listings at a reduced rate;
  • A Corporate Profile on the IAEP website.


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