DLH Holdings Corp. (NASDAQ: DLHC) (“DLH” or the “Company”), a leading provider of innovative healthcare services and solutions to federal agencies, today announced that it has acquired privately-held Social & Scientific Systems (“SSS”) of Silver Spring, Maryland. The firm, with approximately 400 employees, is a leading public health service organization providing solutions in clinical and biomedical research, epidemiology, health policy, and program evaluation. SSS utilizes advanced research (including longitudinal studies), data analytics, and secure IT platform services to assist mission-critical public health agencies within the Department of Health & Human Services – including the National Institutes of Health (NIH) and the Centers for Medicare and Medicaid Services (CMS) – along with other healthcare-related institutions.