Tim JohnsonJohnson_Tim178

Emergency Management Director

Tim Johnson has been with Douglas County since 2001.  He previously worked as a Classification Specialist in the Detention Center.  Prior to coming to Douglas County, Tim was the Law Enforcement Academy Director for the Larimer County Sheriff’s Office in Fort Collins.  Tim is also a former Air Force Instructor Pilot, and Senior Search and Rescue Coordinator.

Tim’s duties include coordination, facilitation and collaboration of incident management in Douglas County.  He works with all agencies and partners, public and private, to ensure effective and responsive emergency management is provided to the citizens of Douglas County.

Tim graduated from the University of Northern Colorado with a Bachelor’s degree in Geography.  He also holds a Master’s degree in Human Behavior from National University.

Mike Alexander

mike alexander

Emergency Management Coordinator

Mike Alexander joined the Douglas County Sheriff’s Office in February, 2014.  He previously worked for the Pike National Forest as an Assistant Fire Management Officer out of Colorado Springs, and spent 11 years with the Pike Interagency Hotshot Crew based in Monument, CO.

Mike’s duties include emergency management coordination in support of incidents in Douglas County. Mike also provides professional leadership, coordination and direction for the administration and implementation of fire suppression, detection, and prevention programs; fuels/vegetation management and the integration of fire management plans and activities.

Mike holds a Master’s degree in Fire Science from Colorado State University, and a Bachelor’s degree in Forestry and Fire Management from Cal Poly San Luis Obispo.

Keith MathenaMathena_Keith216

Emergency Management Deputy

Keith Mathena joined the Douglas County Sheriff’s Office in May of 1993 as a Reserve Deputy. He volunteered for ten years as a reserve before joining the Sheriff’s Office as a full-time employee. Keith began his full time law enforcement career in May of 2003 working in our patrol division.  His tenure includes 3 1/2 years in our mountain district and three years in the Sheriff’s Civil Unit prior to joining the Office of Emergency Management in March of 2012.

Keith spent most of 14 years from 1989 until 2003 at Larkspur Fire Protection District as the Fire Chief. He brings experience with him from his fire career and his current career  in law enforcement.

Keith is currently our Head Explorer Advisor.  He took over these responsibilities in September 2011. He works very closely with several other great advisors that help him in making our Explorer program work.


Emergency Management

4000 Justice Way
Castle Rock, CO 80109
Phone: 303.660.7589
Fax: 303.814.8790
Email Contact

Office Hours:

8:00 a.m. to 5:00 p.m.

Tim Johnson
Emergency Management Director

Douglas County Sheriff

Justice Center

4000 Justice Way
Castle Rock, CO 80109
Phone: 303.660.7505

Office Hours

Monday through Friday
8:00 a.m. – 5:00 p.m.

Highlands Ranch Substation

9250 Zotos Drive
Highlands Ranch, CO 80129
Phone: 303.784.7800

Office Hours

Monday through Friday
7:30 a.m. – 5:30 p.m.

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