Professional Service Industries, commonly referred to as PSI, is a multifaceted professional services organization operating in several sectors across the United States. Founded in 1985 and headquartered in Oakbrook Terrace, Illinois, PSI has established itself as a leader in the fields of engineering, environmental consulting, testing, and other related services. The company offers a wide range of services to clients spanning numerous industries, including commercial and residential real estate, government, telecommunications, energy, and transportation. With a team of highly skilled professionals, PSI delivers comprehensive solutions to meet the complex needs of its diverse client base. In the engineering sector, PSI provides geotechnical engineering, construction materials testing, and special inspection services. Through the expertise of its engineering professionals, the company assists clients in ensuring the structural stability, integrity, and safety of their construction projects. Within the environmental consulting division, PSI offers environmental site assessments, remediation, permitting, and compliance services. It assists clients in navigating complex environmental regulations and implementing effective strategies to mitigate risks and achieve environmental sustainability goals. Furthermore, PSI provides geophysical, non-destructive testing, and building sciences services to identify potential issues in structures and develop appropriate solutions. Recognized for its commitment to quality, PSI operates under a comprehensive quality management system adhering to internationally recognized standards. The company’s advanced technological capabilities and state-of-the-art laboratories further support its ability to deliver accurate and timely results. As an industry leader, PSI continues to expand its footprint across the United States, consistently providing exceptional professional services to its clients while upholding the highest standards of integrity and professionalism.