Otter Student Union

The heartbeat of campus life.

An image of students sitting on the stairs in the OSU

A Place to Belong

The Otter Student Union (OSU) is a student-focused nonprofit and a key part of campus life at Cal State Monterey Bay. It’s a welcoming place where students can relax, connect and get involved. The OSU offers study spots, events, dining, cultural programs and an esports lounge. It also provides space and support for the campus and surrounding communities. Built on care, community and social justice, the OSU helps students feel empowered, included and proud to be part of the Otter Raft.

 

What We Offer

The Otter Student Union is a dynamic center for student engagement, offering spaces for meeting, lounging, dining, gaming, and cultural connection. Services include event reservations, A/V technical support and sustainable digital advertising. The OSU also supports student-led governance through its Board of Directors, where students help shape the OSU’s direction and priorities. It’s a place to study, hang out, organize, collaborate and celebrate — all under one roof.

Otter Student Union

Sustainability at the OSU

As a LEED Silver-certified building, the OSU reflects Cal State Monterey Bay’s broader commitment to sustainability and environmental stewardship. Our building uses water-efficient systems, native landscaping and a Calsense irrigation system to reduce water use. Refillable water stations, low-flow restrooms and a three-bin waste sorting system make sustainable choices easy. We provide e-waste and battery recycling stations, use clean solar energy and integrate sustainability into every area of operation, including events and dining. Event organizers can use the Sustainable Events Blueprint to plan zero-waste gatherings that minimize landfill waste and promote reuse. The Otter Cross Cultural Center within the OSU also leads education and initiatives around environmental justice.

Diversity and Inclusion

The OSU is committed to creating a welcoming, accessible and inclusive environment for all. We incorporate the CSUMB Land Acknowledgement into our events and ensure that all gatherings held in the Union are designed to be accessible, whether that means sign language interpretation, wheelchair access or other accommodations. The work of the Otter Cross Cultural Center is central to our mission. Through its programs and community-building efforts, the Center supports identity development, equity, and action across campus.

3 students sitting at a table with laptops

Meet Mini Monte

Mini Monte is the Otter Student Union’s smallest team member and a favorite on campus. As an eight-month-old sea otter pup, he’s full of energy, curiosity and school spirit. Rescued by Monte Rey and brought to CSUMB, Mini Monte quickly found his home in the new OSU building. He now helps with events, stars in social media posts and brings smiles wherever he goes. He wears his custom OSU hoodie, loves snacks and sunbathing and is always looking to meet new people. His favorite part of the OSU? The students, of course.

OC3 members sitting at a table in the OC3

Otter Cross Cultural Center

A welcoming campus space where students come together, learn about each other and grow as leaders. The center offers events and programs that celebrate who we are, build community and support fairness and respect. It helps students feel connected, learn new skills and succeed in school and in life.

Learn more about the Otter Cross Cultural Center.

Latest News

Professional Staff

Jeffrey Rensel

Jeffrey Rensel

Director, OSU

Diana Ballesteros

Diana Ballesteros

Associate Director, OSU

VĂ¢nia Silveira

Vânia Silveira

Office Coordinator, Otter Student Union

Karina Rios Alvarez

Karina Rios Alvarez

Marketing & Design Specialist

Marlena Truong

Marlena Truong

Operations Specialist, OSU

Carlos Ronco

Carlos Ronco

AV Technical Svs Coordinator

An image of people standing outside the OSU

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Otter Student Union

Jeff Rensel

Executive Director, Otter Student Union