Students from Hueneme High School Touring Gill’s Onions

Students Tour Gill’s Onions

Students from Hueneme High School recently stepped into the world of agricultural innovation during a SEEAG STEM field trip to Gill's Onions in Oxnard, California. The visit gave students a behind-the-scenes look at how agriculture, science, engineering, and sustainability intersect in the modern food system.

The day began with students suiting up in full safety gear—including hard hats, protective glasses, and bright neon vests—before entering the facility. Once ready, the group gathered in a conference room to learn about the company and its operations.

Students were introduced to the science behind onion production and how growing conditions influence which varieties are planted. The Gill’s Onions team explained the difference between short-day and long-day onions, and how the company develops its own seed varieties depending on the region where the onions are grown. They also shared insights into their planting schedule, which begins in October, and the extensive preparation that happens beforehand. Soil testing and environmental assessments ensure that fields meet the precise conditions needed for successful onion production.

After gaining a deeper understanding of how onions are grown and processed, students learned about one of the company’s most impressive innovations: its Advanced Energy Recovery System (AERS).

Turning Onion Waste into Energy

Gill's Onions has become a leader in agricultural sustainability through its innovative use of biogas technology. Each day, the company processes approximately 300,000 pounds of onion waste, transforming what would normally be discarded into renewable energy that helps power its operations.

Through the Advanced Energy Recovery System (AERS), onion waste is separated into two components: a liquid known as onion juice and a solid material called onion cake. The onion juice is then processed in specialized tanks where microorganisms called archaea break down the natural sugars in the mixture. This biological process produces methane-rich biogas, which can be used in a similar way to natural gas while also helping to clean wastewater from the processing facility.

During the tour, students visited the AERS plant area and control room, where they observed the advanced technology and monitoring systems that keep the operation running smoothly. They also had the unique opportunity to view samples of the microorganisms used in the process—tiny organisms that resemble small caviar-like beads—which play a critical role in converting onion waste into energy.

Hearing Real Career Stories

One of the most inspiring parts of the visit was a career panel featuring Gill’s Onions team members. Students heard firsthand stories from professionals working across the company, including software engineers, chemists, hydrologists, and leadership roles.

Each speaker shared their educational background, career journey, and advice for students interested in pursuing careers in agriculture, science, or engineering. The panel also included a special connection for the students: a Hueneme High School graduate who now leads the company’s safety department.

By hearing from professionals with diverse backgrounds, students were able to see the many pathways available within the agriculture industry.

The experience highlighted how innovation, sustainability, and STEM careers play a crucial role in modern agriculture.

Students wrapped up the day with smiles and a special gift of onion seed packets to take home.