Voluntary turnover in the United States is estimated to have cost organizations approximately $536 billion in 2016. Given the costs associated with hiring and training new employees, companies unable to retain key staff fight an uphill battle to remain competitive. This literature review, authored by Insight’s military and veteran support team, describes employee retention trends in the United States and summarizes strategies civilian industry uses to measure and better understand factors that influence retention and employee engagement. It presents an overview of best practices used by civilian industrial organizations to improve retention, including a special focus on caregiver leave and sabbaticals. The report concludes with a synthesis of lessons learned and implications for the military.