National Protection & Investigation Agency (NPIA) is a full-service private investigations firm based in the Chicagoland area that specializes in protective services, process serving, and investigative services. NPIA prides itself on providing the highest level of professionalism and service to each and every client. The executive team at NPIA brings with it decades of vast practical experience from both the public and private sector that we utilize to ensure that NPIA provides a quality product that meets your needs. Whether you are an individual, an attorney, a law firm, or a venue in need of one of our branches of specialization, we will work with you to ensure that those needs are met.