Our People
Our team of 1,600 is driven by our mission of improving public well-being and a shared belief in our clients’ missions. We are economists, data scientists, educators, technology developers, clinicians, policy experts, innovators, and story tellers. We are objective collaborators, dedicated to revealing truths and creating impact that will shape a more equitable and just world.
Mathematica's reputation for quality and objectivity is based in no small part on the caliber of my colleagues and their passion for the pursuit of equity.

Paul Decker President and Chief Executive Officer
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Senior Researcher
Jessica Nysenbaum’s work focuses on strategic decision making in policy and program operations for Medicaid and the Children’s Health Insurance Program, including about managed care, social determinants of health, and data and analytics.
Featured Publications- Addressing Unaddressed Needs: Helping Agencies Target Services to Children and Caregivers in Child Welfare
- Evaluating the HCIA – Behavioral Health/Substance Abuse Awards: Second Annual Report
Topics- Medicaid and CHIP
- State Health Policy
- Delivery System Reforms
- Health
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Principal Researcher
Rick McManus has a diverse background in social work, behavioral health, long-term services and supports, end-of-life care, and Medicaid policy and data analytics.
Featured PublicationsTopics- Medicaid and CHIP
- Long-Term Services and Supports
- Population Health
- State Health Policy
- Health