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Harvest Berry Sampler & Cellar Intern 

About the Organization Created in 1978 by Baron Philippe de Rothschild and Robert Mondavi, Opus One remains committed to realizing our founders' dream of bringing to life one unique wine that expresses the seamlessly blended personality and character of each family. With a great sense of pride in our work to realize this dream, the people of Opus One bring profound dedication and unsurpassed attention to detail in our daily work. We care deeply for the quality of our relationships within the winery, with our trade partners and with our customers.  


Opus One Winery is looking for Harvest interns to join us for the 2024 Harvest. The Harvest Berry Sampling and Cellar Intern is a hybrid position that works closely with the vineyard, lab and cellar teams to perform all harvest berry sampling and cellar duties. Responsibilities include but are not limited to berry sampling for crop estimates and juice analysis, data entry, pressing, pump overs, barrel preparations, topping and sampling as needed. We strive to provide a safe, educational, and enjoyable work environment while learning the day-to-day operations within the cellar to reach absolute wine quality.

This is a temporary position anticipated to start on July 8th and is anticipated to last for approximately 5 months until December 6th, subject to harvest conditions.


Essential Duties and Responsibilities


Berry Sampling Responsibilities will occur July to September

  • Perform stem and leaf water potentials
  • Count and collect cluster and berry samples for crop estimates
  • Collect berry samples from various vineyard blocks
  • Process berry samples in the laboratory
  • Data entry using AgCode
  • Perform basic analysis: berry weights, °Brix, use of OenoFoss
  • Map vineyard blocks
  • Other duties may be assigned


Cellar Responsibilities will occur from September to December

  • Conduct pump overs and assist with additions
  • Pressing
  • Sanitation of tanks, equipment, etc.
  • Barrel preparation and maintenance
  • Topping and sampling as needed
  • Fruit receival and sorting
  • Bottling
  • Maintain cellar cleanliness and organization
  • Other duties may be assigned



  • Must possess a High School diploma
  • Desire to work in the cellar, vineyard and lab with a positive attitude, a willingness to learn and prioritize 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.


Must be able to perform quality work, safely and consistently with minimum supervision or direction. Use proper safety equipment and safety procedures. Ability to comprehend the consequences of various problem situations and to refer them to the appropriate people for resolution.


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 Vineyard/Winery/Cellar/Lab and in the vineyards. The individual is occasionally exposed to fumes or airborne particles relative to normal Cellar and Lab 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.

Position Requirements  
EOE Statement We are an equal employment opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status or any other characteristic protected by law.  
Exempt/Non-Exempt Non-Exempt  
Full-Time/Part-Time Seasonal  

This position is currently accepting applications.

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