Clark Dietz is a multidisciplinary engineering consulting company that provides planning, design and construction management services. It offers solutions for transportation, civil, environmental, electrical, mechanical and structural systems. The employee-owned company has been operational for more than 50 years. Clark Dietz also provides advanced wastewater treatment services. It serves municipalities, government agencies, health care organizations and private corporations. The company offers solutions for clients throughout Illinois, Indiana and Wisconsin. Clark Dietz also maintains a staff of over 150 individuals. It provides services for interior lighting, domestic water and medical gas systems. The company also offers commissioning and municipal engineering solutions.