Summary
Overview
Work History
Education
Skills
Career Achievements
Timeline
Generic

Brett Callahan

Highlands Ranch,CO

Summary

Dedicated and seasoned law enforcement professional with over 30 years of progressive experience in policing, criminal investigations, and departmental leadership. Known for a strong ethical compass and commitment to professional standards. I bring 15 years of investigative specialization and 15 years in supervisory and command roles. As a certified trainer in key disciplines—ranging from interview and interrogation to active threat response, I offer expertise in operational command, complex incident management, officer mentorship, and organizational development.

Overview

30
30
years of professional experience

Work History

Commander / Lieutenant / Detective Sergeant / Patrol Sergeant / Traffic CPU Sergeant

City of Lone Tree Police Department
10.2004 - Current
  • Currently, I serve as Operations Commander, responsible for managing investigative units, traffic, and special services operations.
  • Spearheaded the creation of the Investigations Unit, establishing all evidence handling and storage protocols.
  • Held multiple supervisory roles, including Detective Sergeant, Patrol Sergeant, and Special Services Sergeant, each with oversight of personnel, training, and operational execution.
  • Directed major community events and special operations via the Community Partnership Unit.
  • Acted as Chief of Police during periods of transition; engaged in city-wide policy-making and represented the department at City Council meetings.

Detective / Patrol Officer

Town of Erie Police Department
12.1996 - 10.2004
  • Conducted high-level covert investigations as part of the Boulder County Drug Task Force, targeting narcotics and weapons trafficking.
  • Functioned as General Detective, investigating crimes involving property, persons, and financial fraud.
  • Served on Boulder County SWAT as a tactical operator for high-risk deployments.

Deputy I

Weld County Sheriff's Department
07.1995 - 12.1996
  • Worked in jail operations, inmate transport, and courtroom security.
  • Collaborated with the Greeley/Weld Gang Unit on intelligence-gathering missions.

Education

Police Staff and Command Certificate -

Northwestern University
01.2008

Bachelor of Science - Criminal Justice

Columbia Southern University
01.2002

Skills

  • Advanced Interview & Interrogation Techniques
  • Homicide & Major Case Investigations
  • SWAT Team Leadership – Boulder County
  • DEA-Certified in Undercover Operations & Surveillance
  • Courtroom Testimony & Expert Witness Credentials
  • Patrol, Traffic, & Community Supervision
  • C-3 Pathways Active Shooter & Incident Command
  • Ethics & Anti-Bias Policing Instruction
  • Use of Force Training & Expert Testimony
  • Certified Crime Scene Investigator (CSI)
  • Financial & Fraud Investigations
  • Certified Master Range Instructor

Career Achievements

  • Officer of the Year (1999), Narcotics Detective of the Year (2000), Governor’s Award Recipient (2002)


  • Detective of the Year – District Attorney’s Office (2003); additional honors include Life Saving and Meritorious Service Awards




CAREER ACHIEVEMENTS (CONT'D)


  • Operational responder to Columbine, Arapahoe, and STEM High School shootings and City of Boulder Riots


  • Nationally featured on CNN, America’s Most Wanted, and John Walsh’s Pursuit of Justice

Timeline

Commander / Lieutenant / Detective Sergeant / Patrol Sergeant / Traffic CPU Sergeant

City of Lone Tree Police Department
10.2004 - Current

Detective / Patrol Officer

Town of Erie Police Department
12.1996 - 10.2004

Deputy I

Weld County Sheriff's Department
07.1995 - 12.1996

Bachelor of Science - Criminal Justice

Columbia Southern University

Police Staff and Command Certificate -

Northwestern University

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