Burnette 'Burny' Mattinson, who died on Monday after a short illness, was the longest-serving employee of The Walt Disney Company. He joined the organisation as a teenager in 1953, working in the post room before becoming part of the animating team as an assistant on the 1955 film <a href="https://www.thenationalnews.com/arts-culture/film/this-may-contain-outdated-cultural-depictions-disney-includes-warning-on-controversial-films-1.936908"><i>Lady and the Tramp</i>.</a> He was a vital part of several Disney productions, including many of the company's contemporary classics. Here are five of his career-defining films. Mattinson worked as an assistant animator on the film<i>. </i>It was the second he worked on in that capacity after 1959's <i>Sleeping Beauty</i>, with the renowned Marc Davis.<i> </i>For the next decade, he would work alongside another revered Disney animator, Eric Larson, on several titles including the television series <i>Walt Disney’s Wonderful World of Color</i>, which ran from 1961-1979, 1964 film <i>Mary Poppins</i> and the 1970 films <i>The Jungle Book</i> and <i>The Aristocats</i>. Mattinson’s big break as a fully fledged animator came with the 1973 film <i>Robin Hood, </i>which he worked on after an eight-week training programme at Disney. He then became a key animator on <i>Winnie the Pooh and Tigger, Too</i> (1974) and did the storyboards for the 1977 film <i>The Rescuers.</i> “Storyboards are as close to direction as you can get,” Mattinson once said. “You’re telling cameras where to go, what’s happening on screen, where to cut and really making a blueprint for the film.” This film was another milestone in Mattinson’s career. After hearing the 1974 Disneyland Records album <i>An Adaptation of Dickens' Christmas Carol,</i> Mattinson sent the music, along with an idea for a film, to then head of The Walt Disney Studio Ron Miller. The move was a brazen one by the still-budding animator, but it would prove to be fruitful. Miller assigned Mattinson to direct and produce <i>Mickey’s Christmas Carol, </i>paving the way for his next big project as a director — <i>The Great Mouse Detective, </i>a 1986 mystery adventure about a kidnapped toymaker. Besides being an important animator at Disney, Mattinson was also revered for his contributions to the stories of some of the highest-regarded classics in the company’s oeuvre. His most prolific stint as a story contributor to Disney began with the 1991 film <i>Beauty and the Beast. </i>After proving his prowess, Mattinson worked on several other would-be classics, including <i>Aladdin </i>(1992), <i>The Lion King </i>(1994), <i>Pocahontas </i>(1995), <i>The Hunchback of Notre Dame </i>(1996), <i>Mulan </i>(1998), and <i>Tarzan </i>(1999). One of Mattinson’s final projects as a story artist in the animation department, <i>Big Hero 6</i> was released in 2014<i>.</i> It tells the story of the relationship between an inflatable robot named Baymax and tech prodigy Hiro Hamada, and was a critical success. Mattinson's last film as part of Disney’s art department was the 2022 film <i>Strange World. </i>It tells the story of a family of explorers who find themselves in an unmapped land with extraordinary creatures. <b>Scroll through the gallery below to see other people we've lost in 2023 so far</b>