Leonard Casse (SEY 2563 - 2615) was a notable spacecraft designer and engineer and founder of Casse Aerospace known for his influence on J. Harris Arnold, Silas Koerner, Jules Parleigh, and other aerospace luminaries.
In 2587, he was hired as a junior engineer at Roberts Space Industries (RSI) and was assigned to the Starbright transport team, where he was promoted after identifying a potentially dangerous flaw in its design. By 2595, he had been named lead designer of the 2600 Starbright, which was praised for its entry system and internal flight controls upon its release.
In 2599 he left RSI, citing dissatisfaction with the hierarchical structure, and founded his own company, Casse Aerospace, which operated on a flat organizational model in which everyone's opinions would have equal weight. He was only able to create two ships, the Cosmo Sloop and the Hurricane fighter, before perishing in a mid-air collision in 2615. His work rose to fame again in the 2780s, when J. Harris Arnold of Anvil Aerospace began to feature Casse's signature flourishes in his own designs. In 2902, he was inducted into the Edleson Design Institute Hall of Fame.