Materials Testing Group The MT Group represents one of the largest full service testing and inspection companies servicing the construction industry in the NY/NJ/CT/DE/PA regions. They have project experience from Massachusetts to Maryland. Founded in 1980, they are celebrating 25 years of successful service to the construction industry and its related fields. Services include: laboratory, inspection, building, geotechnical, soil boring, QC management and Partnering Alliances. Their areas of expertise include: structural steel, reinforced steel, concrete, windows, asphalt and soil plus specialized tests and inspections. They also conduct special inspections including window, mechanical and curtain wall.