INTERNSHIP DETAILS

Kosta Browne Harvest Lab Intern

CompanyDuckhorn Wine Company
LocationSebastopol
Work ModeOn Site
PostedFebruary 17, 2026
Internship Information
Core Responsibilities
This seasonal role is responsible for monitoring daily fermentation, evaluating sensory characteristics, and performing various wine analyses such as Brix, pH, and alcohol content. The intern must also maintain accurate data entry, prepare standards, calibrate equipment, and contribute positively to the team environment.
Internship Type
seasonal full time
Salary Range
$20 - $23
Company Size
391
Visa Sponsorship
No
Language
English
Working Hours
40 hours
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About The Company
By following this page, you represent that you are over the age of 21. © The Duckhorn Portfolio, St. Helena, CA. Please enjoy our wines responsibly. The Duckhorn Portfolio is North America’s premier luxury wine company, with eleven wineries, ten state-of-the-art winemaking facilities, five tasting rooms and over 2,200 coveted acres of vineyards spanning 37 Estate properties. Established in 1976, when vintners Dan and Margaret Duckhorn founded Napa Valley’s Duckhorn Vineyards, today, our portfolio features some of North America’s most revered wineries, including Duckhorn Vineyards, Decoy, Kosta Browne, Sonoma-Cutrer, Goldeneye, Calera, Greenwing, Paraduxx, Migration, Canvasback and Postmark. Sourcing grapes from our own Estate vineyards and fine growers in Napa Valley, Sonoma County, Anderson Valley, California’s North and Central coasts, Oregon and Washington State, we offer a curated and comprehensive portfolio of acclaimed luxury wines with price points ranging from $20 to $230 across more than 15 varietals. Our wines are available throughout the United States, on five continents, and in more than 50 countries around the world.
About the Role

We are seeking Seasonal Lab Interns to join the team at Kosta Browne in Sebastopol, CA. This role is responsible for fermentation monitoring, tank and barrel sampling, and wine analysis. It is expected that repeatable, accurate sampling and analyses are provided; and a positive work environment is maintained through active team contribution and open communication.

The Duckhorn Portfolio is North America’s premier luxury wine company. We were established in 1976 by Dan and Margaret Duckhorn. Today, our portfolio features some of North America’s most revered wineries, including Decoy, Paraduxx, Goldeneye, Sonoma Cutrer, Migration, Canvasback, Calera, Kosta Browne, Greenwing and Postmark. 

What we will ask you to do:

  • Monitors daily fermentation.
  • Evaluates and communicates sensory characteristics of fermentations to winemaking team.
  • Follows lab protocols to sample from tanks, barrels, and vineyards.
  • Performs analysis of grape and wine samples (Brix, TA, pH, ML, VA, RS, NOPA, Amm., buffer capacity, alcohol, F/TSO2, PCR, microscopy, etc.).
  • Prepares standards, maintains chemicals, and calibrates equipment.
  • Performs additions and inoculations with opportunity for additional cellar work as needed.
  • Cleans and performs preventative maintenance of instruments and equipment.
  • Performs accurate data entry and tracking using Microsoft Excel and Innovint. 
  • Prepares trials and blends upon request.
  • Must be able to work a flexible schedule and work overtime, including weekends during peak harvest period.

 

What you will need:

  • Basic lab skills – including pipetting, titration, and ability to follow protocols
  • High school diploma required, bachelor’s degree in enology or science preferred.
  • Must have effective communication and interpersonal skills. 
  • Intermediate reading, writing, and math skills. 
  • Must have intermediate English communication skills, both written and verbal. 
  • Proficient in Microsoft Word and Excel. 
  • Dependability, independence, and initiative.
  • Ability to stand for long periods of time and lift up to 45 lbs.

 

What we will provide: 
•  The hourly range for this position is $20 - $23. Harvest lunches provided during peak operation. Work boot reimbursement credit.
•  Discounts on wine and merchandise. Periodic educational tastings.
•  Sick time accrual.
•  A diverse team of coworkers that care about each other in a fun, exciting work environment.
•  A company that promotes from within, provides great training and development programs and opportunities.


Key Skills
Fermentation MonitoringWine AnalysisSamplingSensory EvaluationLab ProtocolsTitrationPipettingData EntryEquipment CalibrationCommunicationTeam ContributionMicrosoft ExcelInnovintPhysical StaminaFlexible Scheduling
Categories
Science & ResearchFood & BeverageAgricultureAdministrative
Benefits
Harvest Lunches ProvidedWork Boot Reimbursement CreditDiscounts On Wine And MerchandisePeriodic Educational TastingsSick Time Accrual