Hannah Seigel Proff

Hannah Seigel Proff

Proff Law, LLC • Denver, CO
Criminal DefenseGeneral PracticeJuvenile Defense

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Contact

Email
Phone
(855) 956-1639
Address
3309 N. Downing Street, Denver, CO, 80205, US

Professional

About

Hannah Seigel Proff is a trial attorney who has represented hundreds of adults and juveniles in the state of Colorado over the last 10 years. Hannah is highly experienced in criminal and delinquency cases at all levels from misdemeanors to felonies. Before starting her private practice, Hannah practiced at Johnson & Klein, PLLC as a senior associate where she represented criminal and juvenile clients. Prior to Johnson & Klein, PLLC, Hannah was the policy director for the Colorado Juvenile Defender Center. In that role, she successfully lobbied for legislation in the Colorado General Assembly to improve the treatment of children and youth in the juvenile justice system in Colorado. Hannah was instrumental in getting landmark legislation passed that authorized resentencing hearings for individuals sentenced to life without parole for crimes committed when they were juveniles. Hannah previously spent seven years as a trial attorney in the Denver Office of the Colorado State Public Defender. During this time, she defended thousands of individuals and tried over 30 cases to verdict. As a result of her pretrial investigation and advocacy, Hannah has secured over 40 dismissals for clients before trial. Hannah’s defense experience and successful track record in the courtroom have led to invitations to lecture and share best practices at legal conferences and trainings across the country. With a genuine focus on collaboration, Hannah shares best practices in complex areas such as defending children charged as adults, and litigation techniques, and motions practice. Hannah is not only passionate in the courtroom but she is also committed to community, state, and national policy issues. In her spare time, Hannah invests her time volunteering, leading and consulting for several local organizations. Hannah serves as a consultant for private firms and the Colorado Juvenile Defender Center. Hannah is also an active member of the Denver-area legal community and a member of several bar associations. Hannah has received formal recognition and awards over her career including 5280 Magazine 2017-2023 “Top Lawyer” in juvenile defense. In 2024, 5280 Magazine named Hannah a "Top Lawyer" in Juvenile and Criminal Defense. Hannah was added to the Colorado Super Lawyer list in 2020, and has remained on the list for five years.

About Criminal Defense Law

Criminal defense attorneys represent individuals accused of crimes, protecting their constitutional rights throughout the legal process. They work to achieve the best possible outcome through negotiation or trial. Common matters include dui/dwi, drug charges, assault, theft.

Credentials

Education
2008 University of San Francisco School of Law JD - Juris Doctor 2004 University of Denver BA - Bachelor of Arts
Languages
English | Spanish

Recognition & Involvement

Awards
2024 Super Lawyer, SuperLawyers 2024 Top 50 Women Super Lawyers in Colorado, SuperLawyer 2023 Top Lawyer, 5280 Magazine 2023 Super Lawyer, SuperLawyers 2022 Top Lawyer, 5280 Magazine
Publications
2018 Colorado Bar Association - The Colorado Lawyer Evolving the Standard of Decency: How the Eighth Amendment Reduces the Prosecution of Children as Adults
Associations
2019 - Present Colorado Women's Bar Association Board Member, Officer 2018 - Present ALIGHT Volunteer Attorney 2009 - Present Learn Your Rights in Colorado (LYRIC) Co-Founder & Chair of the Board of Directors 2012 - 2019 Colorado Women's Bar Association Sub-Commitee Member
Updated: Mar 08, 2026