Seneca County NY Democratic Committee

header photo

Mark Sinkiewicz for Seneca County District Attorney











  • A lifelong Democrat who has served in the offices of two former Republican Seneca County District Attorneys because politics has no place in the enforcement of the law.
  • Current District Attorney for Seneca County and the candidate with the most prosecutorial experience. 20 years experience as a prosecutor, 7 years as a public defender
  • Led the DA’s office through the pandemic, bail reform and into the digital age to meet the new discovery demands.
  • Supervises our staff of eight dedicated professionals working to keep Seneca County safe.
  • Obtained grant funding to enhance victim advocacy and secure digital evidence.

I have litigated hundreds of cases within the full range of criminal law: violations, misdemeanors, felonies, and serious felonies along with appeals. I have navigated complex evidentiary issues including DNA evidence, chemical testing, ballistics, cell phone and computer technology. I have conducted countless direct and cross examinations of witnesses, prepared, filed and argued complex pre and post trial motions.

Donate to my campaign at

Follow me on Facebook at

Contact me at


Contact, Donate and Learn More