Full-Time

Laboratory Chemist

Microbiology Division, Regional Wastewater Reclamation

Updated on 9/11/2026

Deadline 9/19/26
Pima County

Pima County

Southern Arizona county government

Compensation Overview

$27.19 - $38.06/hr

Tucson, AZ, USA

In Person

Four days per week, with rotating shifts that may include weekends and holidays.

Bachelor's

Category
Academic & Institutional Research (1)
Required Skills
Microsoft Office
Word/Pages/Docs
Quality Assurance (QA)
Microbiology
Excel/Numbers/Sheets
PowerPoint/Keynote/Slides
Requirements
  • A bachelor's degree from an accredited college or university with a major in chemistry, microbiology, environmental science, biology, or another closely related science as determined by the department head, and two years of professional-level, paid, non-academic experience performing chemical or microbiological analysis in a laboratory setting; relevant experience and/or education may be substituted.
  • Alternatively, two years of employment with Pima County as a Laboratory Technician.
  • A valid driver's license is required at the time of application, and a valid Arizona driver's license is required at the time of appointment.
  • Ability to obtain and maintain the required license and meet the county's driving-record requirements for operating county vehicles.
  • Ability to pass pre-employment background screening, including verification of work history, education, and criminal conviction history.
  • Ability to complete a post-offer physical examination and/or drug screen.
  • Ability to frequently lift, push, or pull objects weighing up to 75 pounds and perform the listed bending, climbing, reaching, squatting, stooping, and grasping activities.
Responsibilities
  • Perform sophisticated chemical and microbial analyses.
  • Operate analytical instrumentation including ion chromatography, atomic absorption and atomic fluorescence analyzers, gas chromatograph/mass spectrometers, inductively coupled plasma/mass spectrometers, and inductively coupled plasma/optical emission spectrometers.
  • Obtain water samples, operate field instrumentation, and record results.
  • Prepare samples for testing using chemical extraction and digestion techniques.
  • Maintain manual and automated records and logbooks, enter and interpret data, and prepare reports.
  • Monitor laboratory data from technicians and chemists in training to validate the accuracy and precision of analytical results.
  • Assist Laboratory Supervisors in writing standardized operating procedures and laboratory audit procedures.
  • Assist Laboratory Supervisors in training Laboratory Technicians and new staff.
  • Perform quality assurance and quality control procedures and documentation to comply with Arizona Department of Health Services licensure requirements.
  • Follow safety procedures in accordance with the laboratory's Quality Manual and Chemical Hygiene Plan.
  • Prepare, use, and properly dispose of chemical standards, solvents, reagents, and bacteriological media.
  • Maintain laboratory records and logbooks for test methods and quality control measures as required by regulatory standards.
  • Maintain facilities and equipment in accordance with departmental and professional standards.
Desired Qualifications
  • Experience within the last five years performing standard laboratory tests or instrumental laboratory analyses on water, wastewater, and solid samples.
  • Experience within the last five years collecting water or wastewater samples in the field and performing field methods including pH, dissolved oxygen, chlorine, and temperature.
  • Experience within the last five years performing microbiological analyses and laboratory techniques including total coliform, fecal coliform, E. coli, aseptic technique, and use of an autoclave.
  • Experience within the last five years performing gravimetric residue analyses including total suspended solids, total solids, volatile total suspended solids, volatile total solids, and total dissolved solids.
  • Experience with Microsoft Office Suite, including PowerPoint, Word, and Excel.
  • Experience handling and working with hazardous chemicals.
  • Experience with peer reviewing data or reviewing and updating standard operating procedures.
  • Experience with Laboratory Information Management Systems.

Pima County is the county government serving Pima County, Arizona. It administers public health, justice, elections, transportation, wastewater, parks, libraries, development services, environmental programs, and community assistance. Residents, businesses, visitors, and partner agencies interact with elected offices and operating departments. Its workforce includes public-health professionals, engineers, planners, law-enforcement personnel, social-service teams, librarians, trades, technology, and administration. County services are delivered under public governance, budgets, procurement rules, and statutory responsibilities.

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