Employment Opportunity

Firearms & Tool Mark Examiner I

Baltimore County Police Department, Towson, Maryland

Salary: $57,220.00 - $71,445.00 Annually

Final Filing Date: Open until filled

Under general supervision, conducts forensic examinations and analyses of firearms, ammunition, and related physical evidence pertaining to law enforcement investigations. Serves as a court qualified expert witness in the field of firearms and tool mark examination.

Duties and Requirements Click to read more


Examples of Duties
  • Examines, identifies, and analyzes firearms and related physical evidence including bullets, cartridge cases, shot shells, wadding, and live ammunition. Identifies fired bullets, cartridge cases and other ammunition components as having been fired from a specific firearm.
  • Test fires firearms and recovers representative samples. Enters test fire and evidence images into regional and local databases. Accesses databases to search for and retrieve information.
  • Examines fired bullets, cartridges and cartridge cases. Identifies any unique markings present on these such as striations, scratches, breech marks, firing pin impressions, extractor marks, and ejector marks. Identifies the caliber and manufacturer of ammunition and components.
  • Obtains standards from firearms in question. Uses a comparison microscope to compare standards with evidentiary materials. Determines if the standards and evidentiary materials came from the same firearm. Compares firearms and fired ammunition.
  • Examines firearms, identifying and documenting their condition, defects, and characteristics. Determines if altered weapons are in violation of Federal Law. Restores serial numbers on weapons. Checks submitted firearms in State file and Baltimore Police C.I.D.
  • Physically and chemically examines evidence. Tests garments for gunshot residues and patterns. Identifies bullet entrance and exit holes in clothing and other materials. Determines the distance and angle traveled of fired bullets.
  • Examines tools and suspected tool marks. Makes test markings and performs microscopic comparison examinations on tool marks to determine if a specific tool was used in an incident.
  • Formulates and presents conclusions based on test results. Prepares detailed, technical reports. Prepares and maintains records and case files. Preserves and labels evidence. Collects and transports evidence from field sites.
  • Attends courses in specialized techniques of firearms and tool mark examination. Attends armourers training programs sponsored by firearms manufacturers.
Examples of Other Duties
  • Performs other related duties as required.


Training and Experience
  • Graduation from an accredited college or university with a bachelor's degree
  • plus
  • Two years' experience in the forensic examination and analysis of firearms, ammunition, and related physical evidence. (Experience in the field of firearms, the processing or examination of forensic evidence, or the laboratory testing of materials, may be substituted on a year-for-year basis up to a maximum of four years for the required education.)
Knowledge, Skills, and Abilities (Entry Level)
  • Knowledge of the principles and practices of firearms and tool mark examination.
  • Knowledge of firearms and ammunition.
  • Knowledge of the principles and practices of forensic science.
  • Knowledge of forensic laboratory operations.
  • Knowledge of the principles and practices of law enforcement.
  • Skill in examining, identifying, and analyzing firearms, ammunition, their components and related materials.
  • Skill in handling, loading, and firing firearms.
  • Skill in identifying fired bullets, cartridges cases, and other ammunition components as having been fired from a specific weapon.
  • Skill in collecting, processing, labeling, and storing evidence.
  • Skill in preparing and presenting reports. Skill in maintaining records.
Knowledge, Skills, and Abilities (Full Performance)
  • Knowledge of County and Departmental rules, regulations, policies, and procedures.
Character Requirements
  • All applicants must be of good moral character and emotionally stable, as determined by a comprehensive background investigation, polygraph examination and drug test.
Physical and Environmental Conditions
  • The work of this classification entails the operation of laboratory instruments and equipment, and the handling of firearms and ammunition.

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How to apply: Apply online

″As I have found a job (through this newsletter!) working in the field of forensics, I no longer need a job newsletter. Thank you!” — Amber Click to receive job posting alerts

Posted: January 31, 2022

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