Harvest Laboratory Technician- Mumm Napa

Position Summary Mumm Napa produces traditional method sparkling wines at our Rutherford winery, with all harvest‑related lab analysis conducted in‑house. The Harvest Laboratory Technician is responsible for the timely and accurate analysis of grape samples, grape juices, fermentations, and finished wines, and for managing specific projects in collaboration with the winemaking team. Key Responsibilities Perform a wide range of laboratory analysis and sampling techniques, including: Monitor primary fermentation by performing daily Brix, temperature, and sensory analysis. Conduct vineyard sample analysis, including Brix and acids. Collect tank and barrel samples as requested. Perform wine and juice chemical analysis (TA, pH, free and total SO₂, alcohol, nitrogen, volatile acidity, residual sugar, malic acid, cold stability). Determine secondary yeast nutrient additions to cellar tanks. Perform chemical tests on grape juices after pressing, fermentations, and wine samples as requested by winemakers. Record results accurately on data sheets. Perform yeast counts and viabilities. Prepare blending and fining and assist in sensory evaluation if requested by winemakers. Maintain instrumentation equipment, including calibration, cleaning, and basic servicing. Troubleshoot instrumentation equipment and analytical methods. Maintain a clean and aseptic work environment. Contribute to the review of standard operating procedures. Assist in all areas of the laboratory to ensure an even workload is maintained. Ensure compliance with relevant industry quality and safety standards. Review previous chemistry records and alert relevant winemaking staff when discrepancies are found. Display a positive attitude and willingness to learn; this is an entry‑level laboratory role with on‑the‑job training. Complete HR onboarding and safety training using basic computer literacy; navigate HR and Microsoft systems independently. Physical Demands And Work Conditions Working conditions in certain winery areas can be cold, hot, wet, slippery, and noisy. Overtime, flexible hours, nights, weekends, and 12‑hour shifts will be required during harvest. Handling hazardous materials and frequent walking, including stairs, ladders, dragging wine hoses, and bending, are required. Essential Skills / Qualifications / Experience Tertiary qualifications in Chemistry, Microbiology, or a related field. Strong communication skills. Ability to interact with people from diverse cultural and socio‑economic backgrounds. Strong analytical and problem‑solving skills. Strong organizational skills. Computer literacy (self‑sufficient in MS Outlook, Word, Excel, and PowerPoint). Ability to lift 50 lbs. Desirable Previous relevant experience in the wine, food, or beverage industry. Basic understanding of regulatory requirements within the Californian wine industry. Experience with sparkling wine. Spanish language skills. Salary Range: $18.00 – $23.00 per hour. Salary will be based on experience, training, education, and geographic location. Trinchero Family Estates provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, or genetics. In addition to federal law requirements, Trinchero Family Estates complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training. #J-18808-Ljbffr