Criminalist I

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Job Description
Description
Under close supervision, to perform physical, chemical, biological and/or digital analyses related to scientific examination of physical evidence in criminal cases.
Selected c
andidates must successfully pass a full background investigation prior to appointment.
COVID-19 Risk Tier - Lower Risk
Typical Tasks
Performs analysis and examines physical evidence in forensic specialty areas such as Audio-Video, Computer Forensics, Drug Chemistry, Trace Evidence, Firearms/Toolmarks, Forensic Biology/DNA, Latent Print Processing, Toxicology, Questioned Documents, Footwear/Shoe Print Analysis, Bloodstain Pattern Analysis, Crime Scene Analysis;
Examines evidence, evaluates findings and interprets results utilizing various techniques including photography, microscopy, wet chemistry, immunoassay, chromatography, mass spectrometry, spectroscopy, DNA typing, data searching and recovery, and digital processing;
Assists with field investigations at crime scenes and other locations to search for, collect, document and preserve evidence;
Consults and advises law enforcement, attorneys and the courts regarding nature of evidence or the results of laboratory analyses and their meaning;
Testifies on the results of laboratory analyses and may interpret the findings for the courts and other legal hearings;
Prepares clear, comprehensive, technically sound and accurate casework reports, including all determined facts and conclusions;
Assists in determining the interrelationship of various pieces of physical evidence;
Maintains laboratory, instruments, equipment and glassware in a constant state of cleanliness, order, and good repair;
Serves as a liaison with applicable professional organizations to provide and obtain pertinent information necessary in maintaining subject matter expertise;
May be assigned to deliver technical presentations to outside groups;
May be assigned as a Disaster Service Worker, as required;
Performs related work as required.
Employment Standards
Possession of a Bachelor's Degree from an accredited college or university with a major in a natural or applied science, or related field;
An incumbent must possess the minimum qualifications for the discipline assigned as defined by the Laboratory's current accrediting body as well as applicable requirements as set by the Federal Bureau of Investigation's (FBI) Quality Assurance Standards and the California Code of Regulations.
Possession of a valid California Driver's License prior to appointment and the ability to obtain and maintain a County driver's authorization.
Knowledge of:
Modern criminal investigation and identification techniques and procedures;
Basic laboratory safety procedures;
Techniques of scientific research, analysis and report writing.
Ability to:
Perform a variety of basic chemical, instrumental, biological, digital and other laboratory analyses;
Learn a variety of techniques for specialty discipline(s) where casework is assigned and performed;
Study and keep current of new techniques and procedures in the specialized areas of forensics;
Establishes competency and maintain proficiency in specialty disciplines where casework is performed;
Document activities in an accurate and clear manner;
Use the scientific method to solve a variety of complex problems to explain the significance of the results obtained;
Prepare and present clear, accurate and detailed analytical reports for law enforcement agencies, medical examiners, the courts and other agencies;
Gather and analyze physical evidence and formulate conclusions;
Analyze, interpret and present data and outcomes to a broad audience, including law enforcement agencies, the courts and other agencies;
Establish and maintain effective working relationships with those contacted in the course of work;
Communicate effectively orally and in writing, including when serving as an expert witness in the presentation of laboratory findings.
Physical Requirements
Be free from any deficiency in the ability to distinguish colors;
Must have vision correctable to 20/30 in each eye, unless appointed to perform audio analyses;
Must not have suffered hearing loss of over 25 decibels in the 500, 1000, and 2000 Hertz ranges for appointment to audio analyses.
Benefit and Retirement information may vary from bargaining unit to bargaining unit.Due to changes in State Law, current pension provisions described in the union contracts are not automatically applied. Specific pension benefits for new hires who start on or after January 1, 2026 may be different than indicated in the union contracts.
Click hereto access all Memoranda of Understanding and most recent Summary of Changes.
Closing Date/Time: 2/7/2026 11:59 PM Pacific

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