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Harvest Yeast Intern

Opus One Winery

Oakville, CA

Job Description:

Opus One Winery is looking for Harvest interns to join us for the 2024 Harvest. The Yeast Intern will be responsible for inoculating all tanks throughout harvest. This is an extremely hands-on position due to our fermentation processes. Our fermentations are largely inoculated with non-commercial Native yeast strains that require a lengthy and careful propagation procedure. This position will spend roughly 75% of their time in the Cellar and 25% of their time in the Lab. We strive to provide a safe, educational, and enjoyable work environment while learning our winemaking processes in reaching absolute wine quality.

This is a temporary position anticipated to commence in mid-July and is projected to last for approximately 5 months, subject to harvest conditions.

Essential Duties and Responsibilities

Works closely with the Research Manager for communications regarding yeast health & inoculation scheduling
Yeast keg preparation including sanitation, nutrient additions, and pH adjustment
Collection, clarification, and sanitary handling of must for inoculum preparation
Inoculation of all fermentation tanks
Data tracking and record keeping for all inoculations
Communication with both Cellar and Lab team for timely and efficient activity completion
Conduct microscope cell counting and yeast scale-up process
Other duties may be assigned

Must possess a High School diploma
Degree in or pursuing Microbiology or science related field preferred
Desire to work in the cellar or lab and learn winemaking processes with a positive attitude, a willingness to learn and attention to detail
Basic computer skills: Microsoft Word and Microsoft Excel preferred
Individual must have an interest in winemaking and possess a valid driver's license and be insurable by Opus One Winery
Physical ability to perform tasks that may require prolonged standing, sitting, lifting, and other activities necessary to perform essential job functions, with or without reasonable accommodation.

We invite all interested candidates to apply, even if you are unsure about whether you meet all the listed qualifications. Opus One Winery is looking for motivated, passionate, curious individuals who believe in our Core Values and Mission.

Working Conditions/ Hazards:

Work is mainly performed in a Winery/Cellar/Lab. The individual is occasionally exposed to fumes or airborne particles relative to normal cellar processes. Noise levels are usually moderate to loud. Occasionally works near moving machinery parts and is occasionally exposed to wet and/or humid conditions and toxic or caustic chemicals.


Accident prevention is of utmost importance in all phases of job responsibilities.

Follow all company policies and procedures including job safety, safety rules and regulations.
Assist management to provide safe and healthy working conditions at all times.
Immediately report all unsafe conditions, work-related accidents, and illnesses to the Safety Manager and your supervisor.

SUSTAINABILITY: Opus One Winery is committed to doing its part to ensure a sustainable future and improve the environmental well-being of our community. We will continue to ensure minimal impact by continually evaluating our environmental performance and working to improve our program whenever necessary with integrity and purity of focus.

COMPENSATION: Base Compensation: $21.00 USD hourly

Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Opus One Winery is proud to be an equal opportunity employer. We celebrate and welcome diversity and are committed to creating an inclusive environment.

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Additional Information:

Job Posted:
Tuesday, July 9th
Type of Work:
Harvest Help
Job Level: