Public Information

Sheriff Hayden began his career in law enforcement when he joined the Summit County Sheriff’s Office in the state of Colorado. After serving two years he decided to pursue his lifelong goal by returning to his home state of Kansas and becoming a Deputy with Johnson County. Growing up in the De Soto, Kansas area, he was familiar with the Johnson County Sheriff’s Office and the professionalism and dedication of the deputies who served. In 1981 his goal was achieved when he began his career with Johnson County.

Sheriff Hayden began as a Deputy assigned to Detention, where he learned the intricacies and inner workings of the District Court system. He also began a long-lasting relationship with attorneys working for the prosecution and defense, as well as the Judges mediating the trial process. During his 28-year career with the Johnson County Sheriff’s Office, he also served as an undercover officer with the City-County Investigative Squad, a uniformed patrol officer, a dispatcher, and a firearms instructor/armorer. He was promoted to Sergeant in 1987, which began his experiences in supervision and management. Sheriff Hayden served as a Patrol supervisor and Communications supervisor. In 1997 he was promoted to the rank of Lieutenant which added additional duties and responsibilities. It was during this period that his knowledge of the entire operational needs of the Sheriff’s Office was developed. 

After serving over 30 years in law enforcement and public service, including 28 years of experience in the Johnson County Sheriff's Office, he began serving a four-year term as the elected County Commissioner from the Sixth District. Sheriff Hayden also has a distinguished record of community involvement, including serving on the boards of the Consolidated Rural Water District #6 and District #7, past member of the Northwest Consolidated Fire Department board of directors, and the past president of the Northwest Consolidated Zoning Board. His civic experience includes the American Legion, the Olathe Rotary, the De Soto Masonic Lodge, and the Chambers of Commerce in every municipality in Johnson County.  Calvin is also a proud supporter and member of the National Rifle Association.  Calvin is a member of the De Soto Baptist Church and also enjoys attending the Lenexa Baptist Church.

He is a veteran of the United States Army Reserves, 159th Military Police and the 406th Engineer Batillion, where he served from 1974 - 1980.  He also served in the United States Coast Guard Reserves from 1986 - 1990, achieving the rank of Petty Officer.   

Calvin is married with five children and five grandchildren. He and his wife reside in Gardner. 

Undersheriff Reece has worked for the Johnson County Sheriff's Office since 1986.  Outside of his active role here, he is involved in several national and international law enforcement committees, such as those dealing with Homeland Security, domestic violence and federal legislation impacting first responders.  He's also an active leader in the Kansas Peace Officers Association.

Undersheriff Reece grew up in a law enforcement family, so he's always known this was his calling.  He spent his childhood in western Kansas, where his dad served as Sheriff and Chief of Police for nearby agencies.

Over his nearly four decades at the Johnson County Sheriff's Office, he has worked his way up through every rank and has either worked in or managed nearly every division we offer.

He resides in Olathe with his family, where he is a proud father to his daughter and a devoted husband to his wife of 32 years.

Chief Deputy Mark Leisten joined the Johnson County Sheriff’s Office as Chief Deputy on October 22, 2018. Mark began his law enforcement career in 1996 with the Lawrence, Kansas Police Department.  After completion of the academy, he was assigned to the patrol division serving on all patrol shifts. 

During his more than 22 years at the Lawrence Police Department, Mark most recently served as the midnight shift supervisor, where he has also served on the Crisis Response Team for 10 years as well as the Traffic Safety Unit.  Mark is an Advanced Accident Reconstructionist, emergency vehicle operator instructor, as well as the supervisor for the traffic crash reconstruction team. 

As if his Law Enforcement career wasn’t busy enough, Mark joined the United States Army Reserves in 1989 and is still serving today, approaching 31 years in the military.  He enlisted as a flight engineer on the CH-47 Helicopter at New Century, Kansas, reaching the rank of Staff Sergeant when he was selected for a direct commission to 2^nd Lieutenant as an Aviation Officer.

Upon his commission, Mark attended flight school at Fort Rucker, Alabama.  He has deployed overseas in support of Operation Nobel Eagle, Operation Enduring Freedom and Operation Iraqi Freedom as a CH-47 Helicopter pilot.  Mark is now a Lieutenant Colonel in the U.S. Army Reserves currently assigned as a Regional Emergency Preparedness Liaison Officer at FEMA Region VII. 

Mark earned a Bachelor’s Degree in Crime and Delinquency from the University of Kansas and has also completed military education courses as both an enlisted soldier and a commissioned officer as well as a graduate from the Command and General Staff College, Fort Leavenworth, Kansas in June 2016. 

Mark is an active member of VFW Post #6654. He is married and has two children.