William Johnson is an NFL Players Association (NFLPA) Certified Contract Advisor and the founder of Vigilant Sports Agency, a Florida-based sports management firm dedicated to representing professional football players throughout every stage of their careers. With nearly two decades of experience in athlete representation, Johnson has built a reputation for providing personalized guidance in contract negotiations, career planning, marketing, and long-term athlete development. Through Vigilant Sports Agency, he emphasizes a relationship-driven approach designed to help clients succeed both on and off the field. Johnson founded Vigilant Sports Agency in 2006 with the goal of offering comprehensive representation tailored to each athlete's individual needs. The agency specializes in NFL contract negotiations, career development, branding, and financial guidance, while also helping clients prepare for life after football. Under Johnson's leadership, the firm has developed a philosophy centered on integrity, accessibility, and building sustainable careers rather than focusing solely on contract negotiations. Before launching Vigilant Sports Agency, Johnson established himself within the football representation industry as an NFLPA-certified contract advisor, representing a growing roster of professional athletes. During his career, he has negotiated numerous NFL contracts and has consistently been recognized among agents managing significant NFL contract value and client portfolios. His experience has enabled him to advise athletes through the NFL Draft process, free agency, contract extensions, and long-term career management.