Employment Opportunity

Forensic Scientist I (Firearms/Toolmarks/Ballistics)

Nassau County Office of the Medical Examiner, Division of Forensic Services, Westbury, New York

Salary: $38,479- $87,892 per year

Final Filing Date: Open until filled

This is the entry-level class in the Forensic Scientist (Firearms/Toolmarks/Ballistics) series. The work involves responsibility for processing items of physical evidence for the purpose of firearms, ammunition, and tool mark identification and analysis using various physical and chemical methods. This position differs from Forensic Scientist II (Firearms/Toolmarks/Ballistics) by virtue of it being an entry-level position, the training requirements of the incumbents, performance of routine tasks and the decreased independence of work. All work performed by incumbents in this class is performed under close direct supervision from higher level employees in this series. General supervision is received from the Director of Laboratories; performs related work as required.

Duties and Requirements Click to read more


  • Performs routine examinations on clothing, bedding and other surfaces for the presence of gunshot residues or powder patterns.
  • Performs routine examinations and comparisons of firearms, bullets, shells, casings and other related weapons, and determines and records physical parameters using measuring projections, micrometers and other equipment.
  • Performs routine tool mark examinations.
  • Disassembles, reassembles, makes safe and tests firearms to determine their operability, safety and accuracy.
  • Performs data entry of firearms related data and images of fired evidence ammunition components into a computerized digital imaging system and is responsible for the management of database records.
  • Performs routine chemical restoration of obliterated serial numbers and other markings on weapons.
  • Meets with attorneys, investigators and other related personnel regarding approaches to analysis and results in pretrial conferences.
  • May perform photography using digital and conventional photographic equipment, and assists in the interpretation of computerized digital image correlation.
  • May assist in the inventory, maintenance, storage, and disposition of evidence.
Performance Knowledge, Skills, and Abilities
  • Working knowledge of modern laboratory methods, procedures and equipment related to forensic firearms examination.
  • Working knowledge of the design, construction and operation of firearms and the various types of ammunition.
  • Working knowledge of the safe operation of firearms.
  • Working knowledge of microscopy, especially comparative techniques.
  • Working knowledge of the use and operation of a computerized digital imaging and inventory system used in the laboratory.
  • Working knowledge of penal law and rules of evidence as it applies to weapons evidence.
  • Skill in the use of laboratory equipment related to firearms analysis.
  • Skill in the application of laboratory and scientific research practices and techniques to firearms analysis.
  • Ability to apply scientific procedures, methodology, and formulas to assigned work.
  • Ability to analyze and evaluate information and observations, and to arrive at and construct logical and sound conclusions.
  • Ability to explain laboratory analysis techniques, procedures and theories in a clear and concise manner so that non-scientists may understand the significance of the results obtained using these procedures.
  • Ability to operate a computer in the performance of duties, including accurately entering firearms related data and use of computerized digital imaging system.
  • Ability to manage data base records and maintain accurate records.
  • Ability to operate and perform routine maintenance on complex laboratory equipment.
  • Ability to communicate effectively, both orally and in writing.
  • Ability to prepare and deliver legal testimony accurately and be cross-examined and remain composed in court.
  • Ability to establish and maintain effective professional relationships.
  • Good judgment.


Minimum Qualifications
  1. Graduation from a New York State or regionally accredited college or university with a Bachelor's Degree or higher in a natural science, a forensic science, an engineering science, or criminalistics;
  2. OR
  3. Graduation from a New York State or regionally accredited college or university with a Bachelor's Degree or higher, which must have included at least twelve (12) credit hours in one of the natural sciences, forensic sciences or engineering sciences, with one (1) year of full-time or its part-time equivalent experience in a forensic laboratory which must have included the examination of firearms;
  4. OR
  5. Satisfactory completion of one (1) year as a Forensic Scientist Trainee with Firearms/Toolmarks/Ballistic specialty;
  6. OR
  7. An equivalent combination of training and experience that is defined by the limits of (1) and (2) above.

Do you have the Education Required? See available on-line and campus-based degree programs now!

How to apply: Submit resume or CV to: crimelab_info@nassaucountyny.gov
Indicate the title for which you are applying in the subject line.

Posted: January 14, 2020

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