Mark Diedrich has been with the St. Louis County Police Department since 1992. After 6 years in communications as a 911 dispatcher, he was promoted to the position of Emergency Management Specialist and began with the Office of Emergency Management (OEM) in August of 1998. In 2004 he was promoted to Emergency Management Specialist II. Since 1998 he has been involved in several planned events such as the 1999 Papal visit, The Presidential and Vice-Presidential Debates in 2000, 2004, 2008 and 2016 as well as many disaster response and recovery operations, including floods, tornadoes, power outages and snow/ice storms.
In September of 2014 he was promoted to Director of the St. Louis County Office of Emergency Management. Under his direction the OEM assisted in the response planning to the civil unrest following the officer involved shooting in Ferguson in August of 2014, as well as the creation of the Incident Action Plans following the release of the Grand Jury’s findings in that same case. In addition, Mark is the Chairman of the St. Louis County Local Emergency Preparedness Committee (LEPC); a member of the Missouri Region C Incident Support Team (IST); Region C Director for MOEMA; a Peace Officer Standards and Training (POST) certified instructor and a member of the International Association of Emergency Managers (IAEM).