Strategic Outsourcing, Inc. (SOI) is a professional employer organization founded in 1990 that is headquartered in Charlotte, North Carolina. SOI processes over $1.3 billion in payroll annually for over 1,000,000 employees across all 50 states. SOI's professional employer organization model allows customers to focus on their core competencies by taking over tedious HR tasks like payroll, benefits, and workers' compensation through an integrated online portal.