Chief Biographies

DAN MUNSEY

Position: Fire Chief/Fire Warden

Biography: Chief Munsey began his career in 1995 as a paid-call firefighter serving the community of Yucca Valley and quickly decided to a pursue a career as a full-time firefighter shortly thereafter. In 1998, Munsey joined our fire department as a full-time firefighter/paramedic. Since then, Chief Munsey has enjoyed a diverse career including executive leadership and management experiences in both the rural and metropolitan fire service communities which includes having worked in every division of San Bernardino County Fire.

Chief Munsey holds a Bachelor’s Degree in Business Administration, a Master’s Degree in Public Administration and holds multiple Incident Command System (ICS) certifications. Munsey has completed many specialized leadership-training courses, including the California Special Districts Association Leadership Academy and the San Bernardino County Management and Leadership Academy; a program that provides comprehensive management and leadership training to county employees. Chief Munsey is one of few fire chiefs in California who possesses a Center for Public Excellence Chief Fire Officer credential and a California State Fire Marshal Chief Fire Officer certificate. Currently Chief Munsey is halfway through the four-year National Fire Academy’s Executive Fire Officer Program.

In addition to Chief Munsey’s service to San Bernardino County, he is the president of the California Fire Chiefs Association Operations Section and is the chair of the International Fire Chiefs Association Technology Council Communications and Data section. He is also a member of the National Fire Protection Agency Forum and has instructed dozens of Fire Service, NIMS, and Incident Command Systems courses throughout his career. Munsey enjoys speaking about his command experiences, leadership, and the use of emerging technology in the fire service at conferences around the nation.

Chief Munsey believes strongly in being active and involved in community service, ensuring department diversity, hiring from our communities, and working in collaboration with other agencies to ensure public safety. Dan Munsey became Fire Chief of the San Bernardino County Fire Protection District on November 20, 2019.

KATHLEEN OPLIGER

Position: Interim Deputy Chief of Operations

Biography: Deputy Chief Opliger’s fire service career began in 1988, when serving as a Paid-Call Firefighter with the Idyllwild Fire Protection District. In 1989, she went to work for the U.S. Forest Service, San Bernardino National Forest, where she served for several years, working her way up through each of the ranks from Hotshot Crew Firefighter to Engine Captain. Opliger temporarily served as a Battalion Chief in both Operations and Training.

In 2005, Chief Opliger came to work for the San Bernardino County Fire Department as a Battalion Chief, serving Division 1 (Valley) and Division 5 (South Desert). For more than a decade, Chief Opliger participated on incident management teams as a division supervisor, operations branch director, and operations section chief. During this assignment, she responded to many large and devastating wildfires and all-risk incidents throughout the U.S. and Canada, most notably to Hurricanes Katrina and Rita.

Chief Opliger lives in Cherry Valley with her husband Rocky and their four Labradors. Kathleen and Rocky have two grown children, Brandon, who is a firefighter on the Palomar Hotshot Crew, and Erin who recently graduated from U.C. Santa Barbara. Kathleen & Rocky enjoy spending time in Lake Havasu City boating, water skiing, and fishing.

JEFF BIRCHFIELD

Position: Assistant Chief, Division 1

Biography: Assistant Chief Birchfield is responsible for rescue operations, fire and emergency medical response in the Valley region; a region that encompasses the western half of the San Bernardino Valley.

Birchfield began his fire service career in 1991 as a paid-call firefighter for Station 37 in Mountain View Acres. He worked as a seasonal firefighter for the Bureau of Land Management on helicopter crew 554 in 1992, and then worked as a firefighter at Ft. Irwin Fire Department prior to coming to County Fire as an Engineer.

In 2000, Birchfield accepted a position with Redondo Beach Fire Department as a firefighter/paramedic. In 2005 he returned to County Fire and spent the next eight years as a Captain assigned to various stations throughout the county including the Training Division. In 2013, Birchfield promoted to Battalion Chief assigned to Division 2 where he has helped secure additional grant funds for the department, performed as an expert witness on multiple cases involving vehicle collisions, and sits as Vice Chair on the FIRESCOPE Task Force

Throughout his career, Assistant Chief Birchfield has actively pursued higher education and training. He earned a Bachelor’s Degree in Applied Management from Azusa Pacific University and graduated from the County’s Management Leadership Academy in 2012.

Jeff resides in Upland with his wife and two children. He enjoys traveling, boating, and golf when he’s not watching his children at their events.

DAN MEJIA

Position: Assistant Chief, Division 2

Biography:  Assistant Chief Dan Mejia is responsible for fire, rescue and emergency medical response in the East Valley region; a region that encompasses the eastern half of the San Bernardino Valley.

Mejia began his fire service career in 1987 as a firefighter in Lake Arrowhead Fire District. In his 32 years, he was worked in all suppression divisions of County Fire. He promoted to Captain in 2000 and was assigned to the Richard Sewell Training Center; where he was responsible for promotional testing and training new recruits. Mejia worked nine years in Fontana before promoting to Battalion Chief in 2013 and Assistant Chief in 2017.

Assistant Chief Mejia holds an Associate of Science degree in Fire Science from Crafton Hills College. He attended the County’s Management Leadership Academy in 2011. He was a member of the Urban Search and Rescue Team until 2013.

RONALD WALLS

Position: Assistant Chief, Division 3

Biography: Assistant Chief Ron Walls is responsible for rescue operations, fire and emergency medical response in the North Desert region which incorporates vast deserts, national forests, and mountain ranges.

Assistant Chief Walls began his emergency services career in 1983 as a U.S. Army rescue climber and combat medic. After his honorable discharge from the military he moved to Southern California and began civilian training for a career in fire service. His fire service career began as a Firefighter/Paramedic for the Hesperia Fire Department in 1988.

He advanced through the ranks to the position of Fire Captain and transitioned to the San Bernardino County Fire Department in 2004. He spent several years as a County Fire Captain before being promoted to Battalion Chief. He has two Bachelor’s Degrees in Business and a Master’s Degree in Leadership and Management from the University of La Verne.

Over the last 9 years, Chief Walls has worked assignments in every division in the county as a Battalion Chief for County Fire. He has been responsible for the CISM/Peer Support/Chaplain team for the department, functioned as the Operations Chief for the San Bernardino Regional Emergency Training Center (Aircraft Rescue Firefighting School), functioned as the HIPAA compliance Privacy Officer for the Department, and served as the department representative to the California Incident Command Certification System Level 200 committee.

Chief Walls also has extensive background and training in trauma care and enhanced threat scenarios including over 30 years experience as the coordinator for Loma Linda University’s International Trauma Life Support Program.

He has been a part of many large scale incidents including the 2003 Old Fire, the 2007 Slide Fire, the Dorner Incident, and most recently was deployed as a part of County Fire’s Type 3 Incident Management team to the Inland Regional Center Terrorist Attack.

Chief Walls has managed several large projects including the transition and annexation of Crest Forest Fire Department into the County Fire Protection District, management of several Capital Improvement Projects such as the revitalization of Fire Station 91/Division 4 Headquarters building, the development and deployment of the Mountain CERT team, and the development of the Division 4 Zone Operations Center (ZOC).

TOM MARSHALL

Position: Assistant Chief, Division 4

Biography: Assistant Chief Tom Marshall is responsible for fire and emergency medical response, and rescue operations in the South Desert region; a region that encompasses many different aspects of terrain and topography that draw visitors from around the world to the eastern Mojave Desert, from Yucca Valley and the Joshua Tree National Park to the Colorado River. This division also neighbors the U.S. Marine Corps Air/Combat Training Center in Twenty-Nine Palms. Division 5 includes the City of Needles and the communities of Havasu Lake and Big River drawing millions of visitors each year for river and lake front recreation.

After exiting the Marine Corps in 1990, Division Chief Marshall began his fire service career as a volunteer with the Newberry Springs Fire Department. In 1993 he was hired as a full-time firefighter with the Fort Irwin Fire Department. He started his career with San Bernardino County Fire in 1998 as an Engineer, was promoted to Captain in 2001, and in 2014 was promoted to Battalion Chief.

Assistant Chief Marshall has served in every county fire division over the last 18 years of his career. He currently serves on Southern California Incident Management Team 1, and has served as the division supervisor and safety officer on the team for the last 10 years.

Assistant Chief Marshall and wife of 24 years, Amy, have two children; daughter Kelsey who is in Georgia after serving in the Army, and son Garrett who is in the Air Force stationed in Texas.

DAVE CORBIN

Position: Assistant Chief, Division 5 & Division 6

Biography: Chief Corbin began his career in the fire service in 1989 with the Upland Fire Department, promoting through the ranks from Firefighter to Engineer, Captain, Battalion Chief, Deputy Chief of Operations, and Interim Fire Chief. From 2014 through 2016 Upland and Montclair Fire Departments merged command staff with Chief Corbin serving as Deputy Chief of Operations and Interim Chief of both departments.

Chief Corbin came to County Fire as part of the Upland annexation in July 2017 and served as a Captain in the City of Fontana prior to being promoted to Division Chief of Administration in December 2017. He has been a Hazardous Materials Specialist since 1991 and holds a State of California Chief Officer Certification.

Corbin and his wife Kathy reside in Corona and have raised three kids: daughter Caitlin and twin sons Josh and Jake.

MIKE HORTON

Position: Fire Marshal, Division 12 

Biography: Fire Marshal Mike Horton is responsible for the Fire Prevention, Hazardous Materials CUPA Program and Household Hazardous Waste divisions within San Bernardino County Fire; which encompasses the entire unincorporated San Bernardino County Fire Protection District area including several contract cities and districts. Assigned to the Office of the Fire Marshal (OFM), Horton leads an office that provides oversight and implementation of all regulatory inspection and planning programs, public education and special events, manages the CUPA for the entire county and the cities within, provides emergency response to Haz-Mat related incidents, and conducts fire investigations.

Fire Marshal Horton began his fire service career as a Firefighter with the City of Norco Fire Department in 1980. He promoted to the position of Captain in 1985 with the State of California and eventually to Chief Officer in 1999 after relocating to the bay area in San Jose. In 2001 Mike returned to Riverside County Fire Department accepting a position with the City of Temecula in Fire Prevention. In 2006, Mike became the Deputy Fire Marshal of the Community Safety Division for San Bernardino County Fire Department. Horton continues to be the Lead Fire Service Ladder Instructor for Crafton Hills Fire Academy and has taught ladders for over 13 years.

Horton holds several California State Fire Marshal certifications. He has completed two levels of the County’s Management Leadership Academy including the management development program in 2009 and the executive development program in 2011.

MIKE ANTONUCCI

Position: Emergency Services Manager

Biography: Mike Antonucci serves as the manager of the San Bernardino County Fire Department Office of Emergency Services (County OES).

Antonucci has over 40 years of fire service experience and has been an indispensable member of the Urban Search and Rescue community for over 15 years.

He started his career as a firefighter in Northern California and has occupied every fire service-related position at least once since then.

Prior to joining County OES in 2012, Antonucci served as Fire Chief for the Upland Fire Department, retiring in 2012. He also served in the Governor’s Office of Emergency Services as Assistant Chief for Emergency Management & Disaster Services prior to becoming the Fire Chief for the California City Fire Department where he served for 8 years.

Antonucci holds a Bachelor of Arts and Master of Science in Public Administration, is actively involved with the California Fire Chiefs' Association, and founded the CFEDWEST (California Fire, EMS and Disaster Educational Foundation) annual conference in Palm Springs, California nine years ago.

JOHN CHAMBERLIN

Position: Deputy Chief of Administration 

Biography: Deputy Chief John Chamberlin is responsible for overseeing human resources, day-to-day fiscal operations, and special projects.

Chief Chamberlin began his full-time career with San Bernardino County Fire with the contracting of services for the City of Adelanto in September 1999, as a Firefighter/Paramedic. Prior to this, he served as both a Fire Dispatcher and Paid-Call Firefighter for both the County of San Bernardino and City of Victorville.

During his time with the County Fire, Chamberlin worked his way through the ranks becoming a Captain in 2004, Battalion Chief in 2013, Division Chief in 2015, and Assistant Chief in 2016. Chamberlin has served on various committees and special projects including oversight of the Fire Suppression component of the department’s Hazardous Materials Response Team and its nearly 60 members.

Chamberlin is qualified as a Type 2 Safety Officer, Division Supervisor and as a Type 3 Incident Commander, Operations Section Chief, and Logistics Section Chief. He holds a Bachelor of Science in Healthcare Administration, a double Associate of Science in Fire Technology and Paramedic Studies and received his Chief Officer Certification from the California State Fire Marshal. In addition, he is currently attending the National Fire Academy Executive Fire Officer Program in Emmittsburg, Maryland.