Precinct 6 Command Staff

SILVIA TREVINO

Precinct 6 Constable

LILLIAN LOZANO

Chief Deputy
About Lillian Lozano

Chief Deputy Lillian Lozano, a native Houstonian, is a 36+ year veteran Peace Officer. She graduated in 1984 from the Houston Community College Police Academy. Lillian began her career as a Reserve Deputy with Precinct 6 in 1985 with the late Constable Raul Martinez. Shortly thereafter, Lillian Lozano came on with Precinct 6 as a full-time deputy. She left Precinct 6 to obtain her many years of experience, working in schools as a campus officer with North Forest ISD, Harris County Precinct 2, HISD Police, Spring Branch ISD Police, and Alief ISD Police. In 2018, Constable Silvia Trevino appointed Lillian Lozano to the position of Chief Deputy of the Field Operations Command, overseeing the entire Patrol Division. Chief Deputy Lillian Lozano holds a Master Peace Officer Certification.

JOE ALANIS

Assistant Chief Deputy
About Joe Alanis

Assistant Chief Deputy Joe Alanis began his 28+ year Law Enforcement career with Precinct 6 Harris County Constable’s Office. In the beginning of his law enforcement career, he served as a truancy officer and a bike patrol officer. He was later promoted as Corporal overseeing Writs, Special Ops, Solo Division, and the Warrant division which included the coordination of the statewide warrant runs. He then moved up in rank to Sergeant over the Contract Patrol division. In January 2017, Constable Silvia Trevino appointed Joe Alanis to Captain and in 2022 he was promoted to Assistant Chief Deputy. Captain Alanis has utilized his 28+ years of Law Enforcement experience and knowledge to oversee the entire Patrol Division. Captain Joe Alanis holds a Master Peace Officer License, an Instructor Certification, and a Police Firearms Instruction Certification.

JOE MARTINEZ

Captain – Administrative Command
About Joe Martinez

Joe Martinez was appointed Lieutenant in the Administrative Command with the Precinct 6 Harris County Constable’s Office in January 2017 after serving over 22 years with the Harris County Precinct One Constable’s Office. In 2022, Lieutenant Martinez was promoted to the position of Captain in Administrative Command and Co-Commander of the Harris County VIPER Squad. He is responsible for directing, managing, supervising, and coordinating the activities and operations of the personnel in various divisions under his command within the Precinct Six Constable’s Office. These divisions include the Courthouse Operations, High Water Rescue, Training Division, Civil Division, Writs Division, Recruiting and Backgrounds, Property & Evidence, and the Precinct six Dispatch Center. He also maintains direct oversite of the K9 Division and the Texas LESO Program. He is tasked with coordinating assigned activities with other divisions, departments and outside agencies and provides highly responsive complex administrative support to budgeting. Captain Joe Martinez has an Instructor Certification and a Master Peace Officer Certification.

MARIO MONTERROZA

Captain – Administration
About Mario Monterroza

Captain Mario Monterroza is an immigrant from Central America and attended Houston public schools throughout elementary and high school. Mario began his 19+ year Law Enforcement career when he graduated from the Houston Community College Police Academy in 2001. Shortly after graduation, Mario joined Harris County Precinct 6 Constable’s Office under former Constable Victor Trevino as a Reserve Officer. After serving for 12 years with Precinct 6, Mario left to work for the Alief Police Department. In 2017, Constable Silvia Trevino appointed Mario Monterroza to the position of Lieutenant over Field Operations. In 2018, Mario was promoted to Captain of the the Administrative Command, overseeing coordination and supervision of several divisions including but not limited to, Bailiffs, Civil Deputies, Civil Clerks, Warrant Clerks, Property Room, Communications, and High Water Rescue. Mario Monterroza holds a Master Peace Officer Certification.

MICHAEL TRAN

Captain – Patrol
About Michael Tran

Captain Michael Tran is a first-generation immigrant from Vietnam who came to the United States when he was three months old. He joined the University of Houston Downtown Police Academy after graduating from high school in 1992. Captain Tran began his career with the Precinct 6 Harris County Constable’s Office in December 1998. He served in several capacities before being promoted to Administrative Lieutenant in February 2014. Captain Michael Tran left to join the Port Terminal Railroad Association as a Special Agent for two years. In January 2017, Michael Tran was appointed by Constable Silvia Trevino as a Patrol Sergeant and was shortly thereafter promoted to Lieutenant. In October 2022, Michael Tran was promoted to Captain. Captain Tran has been serving our community for over 24 years.

SIMEL MALDONADO

Lieutenant – Patrol
About Simel Maldonado

Lieutenant Simel Maldonado began his law enforcement career with Precinct 6 in December 2009 as a Reserve Deputy. In 2017, Simel Maldonado became a full-time Deputy assigned to the EaDo Contract Division. Simel Maldonado was promoted to the position of Sergeant in May 2019, overseeing operations in the Contract Division and promoted to Lieutenant in 2022, assigned to the Patrol Division. Lieutenant Maldonado is a member of the High Water Rescue Team as a boat operator and technician. Lieutenant Maldonado holds an Advanced Peace Officer Certification

WARREN SIMMONS

Lieutenant – Contract Support
About Warren Simmons

Lieutenant Warren Simmons Jr. has over 19 years in Law Enforcement. His passion to help other people is what led him to a career in Law Enforcement. Interacting with the public allows him to educate, be knowledgeable of the public needs, and to “protect and serve” Harris County. In 2018, Constable Silvia Trevino promoted Warren Simmons Jr. to Lieutenant overseeing the entire Houston Housing Division. Lieutenant Simmons received his Peace Officer Certification from the University of Houston Downtown Police Academy in 2001. He is a member of the Precinct 6 Honor Guard and has obtained an Advanced Peace Officer Certification.

ALFREDO SOTO

Lieutenant – Administration/Patrol Command
About Alfredo Soto

Alfredo Soto began his law enforcement career with Precinct Six in May 2006 as a Reserve Deputy. In 2009, Alfredo Soto became a full-time Deputy assigned to the Patrol Division. Alfredo Soto was promoted to the position of Sergeant in May 2016 overseeing operations in the Patrol Division and the Houston Housing Authority Division. Alfredo Soto was promoted to the position of Lieutenant in 2022, assigned to the Harris County VIPER Squad. Lieutenant Soto is a member of the Honor Guard, High Water Rescue Team as a boat operator and technician. Lieutenant Soto has an Instructor Certification and a Master Peace Officer Certification.

Reserve Division

RON DANIELS

Chief Deputy – Reserve Division

TONY BRYANT

Captain – Reserve Division