The term 'Vault Expert' can be solved by the crossword solution 'GYMNAST'. A GYMNAST is an athlete who specializes in performing exercises requiring physical strength, flexibility, power, agility, coordination, balance, grace, and control. Gymnasts are typically trained to perform on different apparatus, such as the balance beam, uneven bars, floor, and vault. Vault experts are gymnasts who specialize in the vault apparatus, which requires a combination of speed, power, and technique to execute a successful vault.