Since its inception in 1968 as a geotechnical engineering venture, NTH Consultants, Ltd. has evolved into a full-service infrastructure and environmental engineering firm, well known and respected for providing innovative solutions for tough engineering challenges in the built and natural environment. NTH has grown to a firm of more than 120 employees, serving a diverse client base from five offices throughout Michigan and Ohio. The firm provides a wide range of professional services including underground engineering, geotechnical engineering, civil engineering, and construction engineering services, site assessment and remediation, hazardous materials assessment and abatement, industrial hygiene, facility decommissioning, regulatory compliance, ISO 14001 implementation, waste management, watershed management, air quality, and landfill engineering. Our Infrastructure services include facility condition assessments and restoration design in steel, concrete, masonry, pavement and roofing systems, waterproofing design, and infrastructure / facility asset preservation.