Introduction -- The Health Status of Contractors Who Are Deployed to Conflict Environments Is Not Well Understood: A Review of the Literature -- What Are the Deployment Experiences of Contractors? -- What Is the Mental Health Status of Contractors Who Work in Conflict Environments? -- What Other Health Issues Affect Contractors Who Work in Conflict Environments? -- To What Extent Do Contractors Access Health Care, and What Are the Barriers to Receiving Health Care? -- Conclusions and Policy Recommendations -- Appendix A: Additional Data Tables -- Appendix B: Sensitivity Analyses.