Meet the Disneyland Divers Keeping Finding Nemo Submarine Voyage Running Nightly

A specialized team of certified scuba divers suits up every night at Disneyland park to descend into the lagoon of Finding Nemo Submarine Voyage, inspecting and repairing the mechanical systems that keep the attraction safe. Veterans like Walt Disney Legacy Award recipient Ken Posey and 25-year diver Dave Fisher represent one of the most unusual and unseen roles across all of Disney's parks.

Every night after guests leave Disneyland park, a specialized team of scuba divers suits up and descends into the lagoon of Finding Nemo Submarine Voyage to inspect, maintain, and repair the mechanical systems that keep the attraction running. The team — a rarity even among Disney cast members — works in complete obscurity beneath the surface, ensuring Nemo and friends greet voyagers safely each day.

An Underwater World Most Guests Never See

Beneath the buoyant lagoon of Finding Nemo Submarine Voyage lies an entire mechanical ecosystem that must be inspected, repaired, and maintained every night. The Disneyland diving team suits up with oxygen tanks and wetsuits long after the last guest boards the yellow research submarine, operating in a world that most park visitors never imagine exists.

How a Machinist Became a Disneyland Diver

Longtime diver and Walt Disney Legacy Award recipient Ken Posey did not start his Disney career underwater. He began as a machinist at the Matterhorn before a recruitment call changed everything. "Someone came through one day and asked if anybody wanted to learn how to dive," Ken recalled. "I said, 'I'll do it.'" Scuba training followed, and Ken never looked back. The skills he developed on the job eventually took him to Australia's Great Barrier Reef — a destination he credits directly to what he learned working nights beneath the lagoon.

A Night's Work Below the Surface

At minimum, two members of the diving team enter the lagoon every night, sweeping the attraction for anything out of place. Depending on the assignment, a dive might involve replacing a light fixture, installing a new show element, or supporting a larger refurbishment effort — all executed in the buoyant, zero-visibility environment beneath the ride vehicles above.

Team member Dave Fisher describes the mission simply: "We're trying to keep whatever the engineers design operating properly. If the attraction is deviating from that, whether it's a safety precaution or a show element, we're going to find a way to fix it."

Twenty-Five Years of Making Magic Underwater

For Dave Fisher, diving at the Disneyland Resort is a privilege that still surprises him more than two decades in. "I get paid to dive," he says with a wide smile. His passion for underwater exploration began as a hobby in the 1980s when a friend persuaded him to take a class for fun. Since discovering the Disneyland diving team, Dave has remained devoted to the role, motivated by an unusually direct connection between his work and guest happiness.

"We want anyone who comes here, even a 2-year-old who spots Nemo, to be happy," Dave says. "We want to make the ride safe and give guests the best experience we can."

Why This Matters for Park Guests

The next time a guest boards the yellow research submarine of the Nautical Exploration and Marine Observation Institute (N.E.M.O.) at Disneyland park, the smooth, reliable experience is the direct result of the diving team's overnight work. Hidden from every guest and rarely discussed, these cast members represent one of the most unusual and essential roles at any Disney park — proving that the magic above water depends entirely on the dedication happening below it.