As one of the best Denver private investigation firms, Apex Investigation Solutions LLC specializes in surveillance, process service, and background checks. By offering superior service, using industry-tested techniques, and utilizing state-of-the-art equipment, Apex strives to provide superior results. Our investigators have vast experience ranging from time in the U.S. Marine Corps to Law Enforcement, and accreditation ranging from Surveillance certifications from Executive Security International and the completion of reputable Private Investigator Training Courses. Whether you are an individual, a business, or another entity seeking information, we have experienced investigators prepared to assist. Call Apex today.