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Senior Chemist

Bronco Wine Co.

Ceres, CA

Job Description:

JOB STATEMENT: The Senior Chemist must be able to perform majority of wet chemistry analyses on juice or wine samples within 90 days of their hire, or at time of promotion. They must be able to operate and calibrate lab instruments. Must be able to work with minimal supervision performing primary analyses after training period. Must be able to maintain a clean, organized work area. Must be able to set up new projects and methods with little supervision. Must write in a clear, concise manner and fill out paperwork completely and correctly. May oversee subordinate personnel. Must be able to oversee and continue instrumentation training for lab personnel. Must be able to communicate professionally and effectively with all personnel.

Essential Duties:

•Understand and comply with all ISO9001, HACCP and GMP requirements and processes.
•Perform required chemical analyses for weekly bulk samples, blends, bottling approvals, grape and fermenter samples.
•Operate, calibrate, and troubleshoot lab instruments.
•Maintain knowledge of new analytical methodologies that may be applicable to grape and wine analysis.
•Set up new projects and procedures, including method development.
•Prepare and standardize chemical solutions.
•Lead and oversee shift personnel, including continuation of training schedule.
•Maintain familiarity and compliance with Safety Rules, Procedure Manuals, SDS.
•Execute and report on projects as assigned by Winemaking or Lab Manager.
•Fill in for Lab Supervisor or Lab Manager as needed.


•Train Lab Techs, Chemists, and Interns with respect to safety regulations, paperwork, and primary wine analyses according to the procedure manual.
•Perform calibration checks of equipment according to schedule.
•Maintain certification as TTB-Certified Chemist and generate export forms upon request.
•Improve and optimize existing methods and SOPs.
•Follow lab maintenance and cleaning schedule.
•Assist in calibration or verification of company equipment for ISO certification
•Other duties as assigned by the Lab Supervisor or Lab Manager.


•Bachelor’s Degree, or higher, in Chemistry, Biochemistry, or related Lab Science with Chemistry Minor. Master’s Degree preferred.
•7+ years’ experience with Lab Instrumentation, techniques, and troubleshooting.
•Knowledge of Good Laboratory Practices.
•Knowledge of Enological principles and practices.
•Knowledge of Cellar, QC and Production operations as they pertain to the Analytical Lab.
•Familiarity with: Chromatography, Spectroscopy, pH, Ion Selective Electrodes, Titration, Distillation, Mass Spectrometry, Electrochemistry, and other related techniques.
•Familiarity with Microsoft Office applications (Word, Excel, Access, Outlook, PowerPoint), IFS, Instrument Software.
•Extensive experience with Instrument troubleshooting, repair, testing, and verification of system integrity.
•Ability to design, administer and critically evaluate results for scientific studies.
•Ability to complete paperwork and data entry, and keep work area clean.
•Method Development design and implementation, including literature searches and method writing.
•Primary location of work is at the Ceres Laboratory. Some travel may be required when providing technical support to other Bronco facilities.
•Most work duties are completed in an office or in the laboratory setting.
•Some outside work, including sampling of water and wine, plus must, pomace, etc. during Crush.
•Manual dexterity is required for analysis and instrument repair. Must be able to move easily throughout the winery.
•Must be able to work at a computer or stand and work at lab bench height for extended periods of time.


The physical demands to successfully perform the essential duties of this job are represented below.

Employee frequently required to:

•Stand for extended periods of time
•Lift 30 – 40lbs.
•Drag up to 50 lbs.
•Use hands to grasp, feel, move, reach or manipulate
•See color changes
•Use a computer (type, use a mouse, do data entry)


Employee will be exposed to:

•Occasional noise levels requiring hearing protection
•Indoor climate, limited outdoor climate
•Frequent work around chemicals or solvents

•All employees must be trained and familiar with Bronco Wine Company’s Injury and Illness Prevention Program.
•Report any accidents and any unsafe conditions to your supervisor immediately.
•Personal Protective Equipment Required: Lab coat or lab apron, appropriate hand protection, Side shield safety glasses, proper footwear, long pants or dresses/boots which cover the legs completely. Head/ear protection when in production facility.

Additional Information:

Job Posted:
Monday, August 18th
Type of Work:
Full Time