Headquartered in Decatur, AL, Alliance Technical Group (ATG) is the leading provider of source testing, emissions monitoring, and analytical services to customers throughout the United States. With expertise in a variety of test methods, Alliance is uniquely qualified to provide customers with the highest quality and most cost-effective solutions available.

ATG differentiates through the use of People, Process, and Technology. Our mission is to exceed our customers’ expectations by providing technically sound, scientifically valid, and legally defensible emissions data. To accomplish this, we work diligently to understand your needs; prepare test programs that address those needs; conduct test programs using appropriate measurement methods; and prepare technical reports that clearly and efficiently communicate test program results. ATG works internally with all employees to create an environment of constant learning, including but not limited to, providing opportunities for continued education, career advancement and strongly encouraging the pursuit of all applicable certifications.