Daniel Hoffman, 312.291.9183
Office Manager
Email: dhoffman(at)
Dan has been the Office Manager for the John Howard Association since 2008. Prior to working at JHA, Dan worked in the retail, corporate, and distribution management fields. Dan graduated from Northern Illinois University with a B.S. in Human Resource Management and a minor in Psychology. His knowledge in office administration coupled with his strong organizational and interpersonal skills build a strong foundation for JHA. Dan will likely be your first contact with JHA whether you have questions about the organization or volunteer activities.
Maya Szilak, 312.291.9236
Policy and Research Specialist
Email: mszilak(at)
Maya is an attorney and John Howard Association's Policy and Research Specialist. She earned her Bachelor's Degree from Tulane University, New Orleans, and her law degree from Loyola University, Chicago. Prior to joining the John Howard Association, she served as a judicial law clerk in the Illinois Appellate Court, First Judicial District. Subsequently, she worked for eight years as an Assistant Appellate Defender in the Office of the State Appellate Defender, representing indigent clients in criminal appeals before the Illinois Appellate Courts and the Illinois Supreme Court, and in clemency proceedings before the Illinois Prisoner Review Board.
Gwyneth Troyer, 312.291.9241
Director of JHA's Prison Monitoring Project
Email: gtroyer(at)
Prior to joining the John Howard Association, Gwyn practiced law in a boutique civil litigation firm, primarily representing whistleblowers in cases involving corporate fraud in government contracts. She earned her B.A. from Reed College and her J.D. from Northeastern University School of Law.
Jennifer Vollen-Katz, 312.291.9555
Executive Director
Email: jvollen(at)
Jennifer is an attorney and the previous Director of the John Howard Association's Juvenile Justice Project. She earned her Bachelor's Degree from St. Lawrence University, New York, her law degree from the Georgetown University Law Center, Washington D.C., and her master’s degree in criminal justice policy from the London School of Economics, London, England. Prior to joining the John Howard Association, Jennifer was a lecturer in law and a clinical supervisor at the University of Chicago Law School, Mandel Legal Aid Clinic, Federal Criminal Justice Project. Jennifer was also a staff attorney with the Federal Defender Program of Northern Illinois, representing indigent clients in criminal cases in the Northern District of Illinois.
Phillip Whittington, 312.291.9237
Prison Communications and Policy Specialist
Email: ptwhit(at)
Phillip earned a Bachelor's Degree in Political Science from Loyola University of Chicago in 2012. JHA receives approximately 3,000 letters, emails, and phone calls from inmates and their families annually. Mr. Whittington draws upon more than two decades of experience with the various facets of the criminal justice system to answer inquiries about a wide range of subjects.
Sarah Sallen, 312.526.3492
Corrections Monitor and Analyst
Email: ssallen(at)