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Command Staff Profiles


Sheriff Devon Bell

Sheriff bell

Sheriff Devon Bell began his career as a Deputy with the Placer County Sheriff’s Office in 1992. He worked a wide variety of assignments within the organization including Corrections, Patrol, Support Services and the Special Investigations Unit. As a Sergeant, he was assigned to the North Lake Tahoe Station for nearly two years in Field Services. He later transferred to the South Placer Station where he directed the Community Services Unit which includes schools, youth services, and volunteer programs. Bell then promoted to Lieutenant in the Support Services Division and later was promoted to the rank of Captain overseeing that division. In December of 2006, he was named as Placer County’s first ever Assistant Sheriff. The position was created because of the tremendous growth and need for administrative support.

In November of 2007, Assistant Sheriff Bell promoted to the rank of Undersheriff. In this role, he was responsible for the operations of the Sheriff’s Office, assumed command of agency in the absence of the Sheriff, and maintained appropriate oversight of employee conduct.

In February 2017, the Placer County Board of Supervisors appointed Devon Bell as Sheriff to fulfill the term of the outgoing Sheriff Ed Bonner. In the primary election of 2018, Devon Bell was elected as Sheriff by the citizens of Placer County.

Growing up, Devon was heavily influenced by his grandfather who served as a California State Park Ranger. This influence sparked an interest in public service culminating with his decision to join the Placer County Sheriff’s Office. Devon is a Loomis native and a Del Oro High School graduate. He holds a B.A. in Criminal Justice Management and a Master of Arts degree in Security Studies from the Naval Postgraduate School. Additionally, he has completed numerous management and training courses including Peace Officer Standards and Training (POST) Supervisory Leadership Institute (SLI), Community Oriented Policing Seminar (COPS), Internal Affairs, POST Management School, POST Executive Development School, Criminal Intelligence for Executives, FBI Law Enforcement Executive Development Seminar (LEEDS) and the FBI National Academy (222nd Session).

Devon, a father of four and grandfather of two, currently resides in Roseville with his wife Sue.   

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Undersheriff Wayne Woo

US Woo

Born and raised in the Sacramento area, Undersheriff Wayne Woo began his career in law enforcement in 1990 with the Lake County Sheriff’s Office. In 1994, Wayne joined the Placer County Sheriff’s Office as a deputy. 

As Wayne rose through the ranks, he served in many units including Investigations, where he worked as a Detective in Property Crimes, and Special Investigations, rising to Sergeant in the Special Operations Unit.  He also served on the Special Enforcement Team (S.E.T.) where he worked as an operator, team leader and eventually team commander. Wayne served as a patrol watch commander, patrol administrative lieutenant and as the station commander for the South Placer Substation located in Loomis. 

Additionally, Wayne has been involved in the Training Division and served as a use of force instructor teaching defensive tactics, impact weapons, and firearms training.  Wayne is considered an extraordinary tactical leader and spent over 18 years as a member of the tactical team.  

In 2012, Wayne was promoted to Captain and took over as the Correction’s Division Commander. In 2013, he transferred to the Field Operations Division where he served until his appointment to Placer County Sheriff’s Office’s second in command.

In February of 2017, Wayne was appointed by Sheriff Devon Bell to the position of Undersheriff.   Sheriff Bell stated, “Wayne’s experience and credibility is respected throughout the region and I look forward to working with him in his new capacity.”

In addition to his duties at the Sheriff’s office, Wayne currently serves on the Board of Directors for the Placer Sheriff’s Activities League (PSAL), as well as serving as a general board member for KidsFirst, a non-profit organization dedicated to ending child abuse and neglect.   Both organizations support and promote his keen interest in early childhood intervention. 

Wayne is a graduate of Bella Vista High School in Fair Oaks, CA.  He received his master’s degree in Criminal Justice Management from the University of Nevada, Reno.  Wayne resides in Newcastle, with his wife and three children.  A lover of the outdoors, Wayne can often be found mountain biking, trail running, or teeing off on the golf course.

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Field Operations Commander Troy Minton-Sander


Captain Troy Minton-Sander began his career with the Placer County Sheriff's Office in 1997. He became a sergeant in 2003, and was promoted to lieutenant in 2010, serving as the lieutenant of Investigations.  Captain Minton-Sander was a member of the Special Enforcement Team. He has worked at our North Lake Tahoe station, our Auburn office, and as station commander in Colfax. He was also a senior use of force instructor.  He is now in charge of Field Operations.

Captain Minton-Sander is a graduate of Placer High School and has a bachelor’s degree. 

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Support Services Commander Jeff Swearingen


Captain Jeff Swearingen began his career with the Placer County Sheriff’s Office in corrections in 1997, before being sent to the academy as a deputy sheriff trainee in 1999.

He has worked in corrections, transportation, patrol, and as a school resource officer before he was promoted to the rank of sergeant. Swearingen was a member of the Special Enforcement Team (SET) for 10 years and was the assistant team leader. He was sergeant in the Crimes Against Persons unit before promoting to lieutenant, and was then assigned to corrections.

After working in corrections, Captain Swearingen was the administrative lieutenant in field operations and the lieutenant in administrative support services. He was a use-of-force instructor and taught defensive tactics, impact weapons, and emergency vehicle driving. Swearingen is also certified as a chemical agents instructor.

He is currently the captain in administrative support services.

Swearingen is a graduate of San Juan High School, hold a bachelor’s degree in Criminal Justice Management and is a graduate of the FBI National Academy. When he’s not working, he likes to run and golf. He is married and has a son and two stepsons.

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Auburn Main Jail Corrections Commander Darrell Steinhauer

Captain Darrell SteinhauerCaptain Darrell Steinhauer began his career with the Placer County Sheriff’s Office in 1994. During that time he has worked a variety of assignments, including Corrections, Patrol, and Investigations. As a deputy, he worked both the Property Crimes and Special Investigations Units. Upon promotion to Sergeant in 2003, he worked Corrections and Patrol, where he served his final assignment as the Administrative Patrol Sergeant.

Darrell has been the lead program manager for several projects and programs within the agency. He was also a member of the agency’s Special Enforcement Team (SET) for 17 years, serving as a team member, assistant team leader, and finishing his tenure as the team commander. After promotion to Lieutenant in 2008, Darrell was assigned to the Placer County Superior Courts, where he assisted in the opening of the Santucci Justice Center in West Roseville. In 2012 he assumed the role of the South Placer Sub-Station Commander in Loomis. Darrell promoted to the rank of Captain in February 2017, and currently oversees the Support Services / Administrative Division.

Captain Steinhauer graduated from Colfax High School. He received his master’s degree in Criminal Justice Management from the University of Nevada Reno. He is also a graduate of the FBI National Academy in Quantico, Virginia (Session 241).

Darrell currently serves on the Board of Directors for the Placer Sheriff’s Activities League (PSAL) and is actively involved in youth sports and charitable programs. He strongly believes that engagement in extra-curricular activities, such as sports, are a positive deterrence from criminal activity.

Darrell is married and a father of two.

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South Placer Jail Corrections Commander Dave Powers

Captain Dave Powers

Captain Dave Powers started his law enforcement career with the Placer County Sheriff's Office in 1994. He started in the Corrections Division before transferring to Patrol. During his time on patrol, Dave was part of the Special Enforcement Team (SET) from 1999-2006. He was selected as a School Resource Officer and served the students at Chana High School. In 2005, Dave promoted to sergeant and served in both the Corrections and Patrol Divisions as a first line supervisor. As a patrol sergeant, he was selected as the K9 Unit supervisor and worked his K9 partner Nash for six years.

Dave promoted to lieutenant in 2010 and served a variety of assignments; at the Placer County Superior Courts; South Placer Adult Correctional Facility; Support Services; and served as the South Placer Substation Commander in Loomis. During his time as a lieutenant, Dave returned to the Special Enforcement Team as the team commander from 2014-2017.

In July 2017, Dave was promoted to captain and is currently assigned as the commander for the Support Services Division.

Captain Powers grew up in San Diego and graduated from Mater Dei High School. He has a B.S. in Criminal Justice. He is married and a father of two.

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Tahoe Station Commander Dennis Walsh

Captain Dennis Walsh

Captain Dennis Walsh was raised in Placer County and began his career as a reserve deputy in 1992 and was hired as a full time deputy in 1993. As a deputy, Dennis worked in the Corrections Division, and as a patrol deputy in the Granite Bay, Loomis, West Roseville and Lincoln/ Newcastle areas. As both a patrol and jail deputy, Dennis served as a training officer and was instrumental in shaping the futures of many current deputy sheriffs.

Dennis was promoted to sergeant in 2003 and served as a first-line supervisor both on patrol and in the Corrections Division. In 2006 Dennis was assigned to run the Crimes Against Persons unit, and spent the next four years supervising a team of detectives that worked many high-profile and unusual investigations.

As a lieutenant, Dennis was assigned to the Corrections Division at a time when the county was still building a new jail and just prior to the implementation of California’s realignment legislation. He became directly involved in the county’s focus group to develop the Community Correction’s Partnership Plan, and was instrumental in identifying strategic plans and data collection processes to better position the Sheriff’s Office to meeting this new challenge.

In 2013, the county approved a budget to open the South Placer Adult Correctional Facility. Dennis participated in the formation of a transition team whose assignment was to get the new jail operational by May 17, 2014. Staff opened the facility for operational training on May 17, and began moving inmates into the facility on May 31.

Dennis was promoted to the rank of captain in July, 2014, and was assigned as the commander for the North Lake Tahoe Station. He brings with him a commitment to providing quality service to the citizens of Placer County and the many visitors that choose Tahoe as their vacation destination.

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Administrative Services Manager Mark Giacomini

Mark GiacominivMark Giacomini began his career with Placer County as a Budget Analyst for the County Executive Office in 2005, and was promoted to the position of Senior Management Analyst in 2007. In 2014, after nine years in the County Executive Office, Mark joined the Placer County Sheriff’s Office as the Administrative Services Manager.

As a member of the County Executive’s Health and Justice team, Mark served as the lead Senior Management Analyst for Health and Human Services, Placer County Fire, Office of Emergency Services, Sheriff’s Office, District Attorney’s Office, and Probation Department. In this role, he was responsible for policy and budget, including oversight of Public Safety Fund budgetary and fiscal management.

Mark enlisted in the United States Navy in 1982, and served 21 years on active duty, until he retired in September 2003. His first 10 years were served in the enlisted ranks at duty stations in San Diego, Mississippi and Virginia. While stationed in Virginia, Mark was deployed multiple times to the Mediterranean Sea, Indian Ocean, and North Atlantic Ocean onboard the aircraft carriers USS Independence (CV-62) and USS Forrestal (CV-59).

Mark received his Bachelor of Science in Business Administration from Old Dominion University in Norfolk, Virginia in 1991, and was commissioned to the rank of Ensign that same year. He spent the next 12 years as a Navy Supply Officer serving at duty stations in Georgia, San Diego, Nevada, China Lake, and Guam. Upon his retirement from the Navy, Mark moved to Auburn to be near his children. His first post-military employment was as an operations manager at the Target Distribution Center in Woodland, California. He was with Target for nearly two years, until he accepted his initial position with Placer County in 2005.

Mark continues to reside in the Auburn area. He has three sons, and is an avid San Francisco Giants and 49er fan. When he’s not at work, you’ll most likely find him on a golf course somewhere.

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