Salary Group B20

Class No. 6053



Performs routine (journey-level) forensic science work. Work involves conducting laboratory tests, conducting analyses, and identifying physical evidence from crime scenes; interpreting analytical results; establishing and maintaining records pertaining to casework and court testimony; preparing technical reports; and testifying as an expert witness in court. Works under moderate supervision, with limited latitude for the use of initiative and independent judgment.


Conducts laboratory tests and performs analysis to compare and identify physical evidence from crime scenes.

Conducts macroscopic, microscopic, and physical examinations of evidence.

Determines weight, diameter, and other measurements of bullets to determine the make and caliber of the gun from which they were fired and to determine ammunition brand, type, and compatibility.

Determines bullet trajectories, cartridge case ejection extraction patterns, and bullet entry and distance factors.

Compares handwriting for determination of authorship.

Identifies weapons by make, caliber, type, and class characteristics.

Prepares reports on examinations conducted.

Serves as an expert witness in court regarding the results of the analyses and examinations of physical evidence.

May conduct chemical analyses on suspected controlled substances.

May conduct analyses of blood and breath for alcohol content and of stains to determine the presence of animal or human blood, its type, and genetic markers.

May conduct crime scene investigations and obtain legible friction ridge impressions of deceased persons in various stages of decomposition.

May examine clothing to retrieve and identify physical trace evidence.

May perform maintenance checks on breath-testing equipment and establish and maintain records of maintenance, court testimony, and breath-test operator certifications.

May function as a member of a disaster team and maintain scientific equipment.

Performs related work as assigned.


Experience and Education

Experience in forensic science work. Graduation from an accredited four-year college or university with major coursework in physical science, criminal justice, or a related field is generally preferred. Experience and education may be substituted for one another.

Knowledge, Skills, and Abilities

Knowledge of fingerprint identification techniques; of proper evidence and hazardous chemical handling procedures; of forensic principles, techniques, and procedures; of criminal court proceedings and rules of evidence; and of weapons and ammunition.

Skill in the use of laboratory equipment and materials and in the use of a computer and applicable software.

Ability to conduct microscopic and macroscopic examinations, to prepare reports, to recommend improvements in methodology and equipment, to conduct crime scene investigations, to perform instrumental chemical analyses, and to communicate effectively.

Registration, Certification, or Licensure

May require a Texas Breath Alcohol Testing Regulations certification.

State Auditor’s Office

Revised 9-1-15