Warren County Pennsylvania Office of the District Attorney

Warren County Pennsylvania

Office of the District Attorney

Staff at the District Attorney Office

Tyra Olson - Office Manager - email: tolson@warren-county.net
Alyssa Morrison - Administrative Assistant - email: anobles@warren-county.net

Rob Greene, District Attorney

Rob Greene took office on January 6th, 2014.  He was a criminal defense trial attorney for 12 years prior to taking office.  He is a graduate of the University of Pittsburgh and Oklahoma City University School of Law where he was the Class President.  He served in the U.S. Army Reserves 99th ARCOM during the Desert Storm era as an acting sergeant until being honorably discharged in 2000.  He was born and lives in Warren Pennsylvania.

Rob Greene can be contacted at: rgreene@warren-county.net.

Cody Brown, 1st Assistant District Attorney

Cody graduated from Western Michigan Thomas M. Cooley Law School in Lansing, Michigan, during which time he was employed as an intern for the Michigan Attorney General’s Office.  After graduation, he was employed as a Judicial Law Clerk for the 37th Judicial District, clerking for the Honorable Maureen A. Skerda, Honorable Gregory J. Hammond and the Honorable William F. Morgan. Cody is also a graduate from Tidioute Community Charter School and Penn State Erie, The Behrend College.

Cody Brown can be contacted at: cbrown@warren-county.net.

Richard A. Hernan, Jr., Assistant District Attorney (P/T)

A former police officer with a  Master’s Degree in Criminology, Rick was admitted to practice law in Pennsylvania in 1975.  He served as Warren County District Attorney from 1978 to 2000, and again from 2002 to 2006.  He was the President of the Pennsylvania District Attorney’s Association and is the Founding President of the Pennsylvania District Attorney’s Institute.  He currently serves on the Board of Directors of the Pennsylvania Coalition Against Rape. 

Rick Hernan can be contacted at: rhernan@warren-county.net.

Tatiana Malys, Assistant District Attorney

Tatiana graduated from Penn State Dickinson School of Law in 2015. She worked briefly as an Assistant District Attorney in Lebanon County, PA prior to working as a Judicial Law Clerk for the 24th Judicial District clerking for the Honorable Timothy M. Sullivan. Most recently, she was an Assistant District Attorney in Franklin County, PA, before moving to Warren in 2018.  Tatiana has a Bachelor Degree in Law from her home country Romania.


Tatiana Malys can be contacted at: tmalys@warren-county.net.

Brian K. Zeybel, Chief County Detective

Brian brings to this office twenty five years of Law Enforcement experience accrued through his service with the Pennsylvania State Police. A majority of his career was spent in criminal investigations, with an eight year assignment as a certified Polygraph Examiner. Brian has been the lead investigator on countless major crimes, and has resolved cases for many local police agencies in the north western region of Pennsylvania utilizing his interview and interrogation skills.


Chief Zeybel can be contacted at: bzeybel@warren-county.net@warren-county.net
 - Lorraine Walker (P/T), (A Safe Place of Warren) Victim/Witness Coordinator


(814) 728-3468.

Victim/Witness Assistant - Jill James