Winegrowing & Lab Intern
Rutherford, California
Job Summary

Essential Duties and Responsibilities:

  1. Viticulture Duties (65%):
  • Monitor shoot growth
  • Measure and record pre-dawn and mid-day leaf water potential
  • Conduct crop estimates—including shoot, cluster and berry counts, taking pictures and data entry
  • Observe and monitor phenology weekly
  • Operate a soil moisture probe for data collection
  • Conduct measurements of Fruition Sciences “smart points” and upload data
  • Sample berries for maturity purpose
  • Prepare berry samples — including count, crush and weight
  • Prepare Buffer solution for berry extraction using a modified Harbertson-Adams assay for berries
  • Report and monitor viticulture experiments
  • Assist with logistics of grape harvest
  • Provide support with integrated pest and disease management
  •  Record and monitor vineyard measurements and vine counts for mapping purposes


  1. Laboratory Duties (35%):
  • Obtain samples from vineyard
  • Take samples of grapes, juice or wine as requested from bins, barrels, tanks, or bottles.
  • Complete daily laboratory analysis during harvest
  • Solvent preparation and extraction for modified Harbertson-Adams assay for berries/wine
  • Record analysis correctly electronically
  • Alert supervisor to any abnormal results or those that might risk wine quality
  • Operate, monitor and calibrate lab equipment, notify supervisor if out of specifications
  • Understand SDS information sheets, hazardous material handling, wear PPE
  • Respect all safety policies and procedures; insure correct operating status of safety equipment
  • Weigh and measure using scale, volumetric pipettes or flasks, graduated cylinders


Supervisory Responsibilities: None

Job Requirements: detail-oriented, curious, scientific perspective, open minded, good relationship and teamwork ability

Education/Experience: BS Degree in Viticulture or related International equivalent; or up to three years related experience or training; or equivalent combination of education and experience. A minimum of one year’s agricultural experience is preferred.

Knowledge, Skills & Abilities:   

  • Analytical Skills - Ability to use thinking and reasoning to solve a problem.
  • Autonomy - Ability to work independently with minimal supervision.
  • Communication, Oral - Ability to communicate effectively with others using the spoken word.
  • Creative - Ability to think in such a way as to produce a new concept or idea.
  • Deductive Reasoning - Ability to apply principles of logical or scientific thinking to a wide range of intellectual and practical problems.
  • Detail Oriented - Ability to pay attention to the minute details of a project or task.
  • Honesty / Integrity - Ability to be truthful and be seen as credible in the workplace.
  • Initiative - Ability to make decisions or take actions to solve a problem or reach a goal.
  • Reliability - The trait of being dependable and trustworthy.
  • Safety Awareness and Accountability - Ability to identify and correct conditions that affect employee safety, be responsible for personal safety and safety of others, adhere to company policies and procedures.


Physical Demands:

N (Not Applicable) - Activity is not applicable to this occupation

O (Occasionally) - Occupation requires this activity up to 33% of the time (0-2.5+hrs/day)

F (Frequently) - Occupation requires this activity from 33% - 66% of the time (2.5-5.5+ hrs/day)

C(Constantly) - Occupation requires this activity more than 66% of the time (5.5+ hrs/day)


Stand – O, Walk – O, Sit – O, Handling – O, Reaching Outward – O, Reaching Above Shoulder – O, Climb – O, Crawl – N, Squat or Kneel – O, Bend – O, Working outdoors – O, Working at the computer - O


10 lbs or Less, F

11 – 20 lbs, F

21 – 50 lbs, F

51 – 100 lbs, O

Over 100 lbs, N


12 lbs or Less, F

13-25 lbs, F

26-40 lbs, O

41-100 lbs, O


Other Physical Requirements

Vision (Near, Distance)

Sense of Sound (i.e. Machinery/forklift sounds)

Sense of Touch

Ability to wear Personal Protective Equipment (PPE) (Steel toe boots, safety glasses)


Work Environment: While performing the duties of this job, the employee is frequently exposed to wet and/or humid conditions, moving mechanical parts, and outside weather conditions.  The employee is occasionally exposed to high, precarious places; fumes or airborne particles; toxic or caustic chemicals; risk of electrical shock; and vibration.  The noise level in the work environment is frequently loud.  Employee works around dangerous, automatic machinery.



  • Valid U.S. Driver’s License and clean DMV record required (if applicable)
  • English and Spanish skills preferred (Bilingual)
  • Wine knowledge and Viticultural knowledge preferred
  • Computer skills: Excel, Filemaker Pro, Word
  • Must be able to lift and carry heavy objects of 40 pounds (1 case of wine)


Posted: February 22, 2021