Otto's organ building career began officially in 1947 but he built his first organ in 1937 when he was just 18 years old for his home church of Immanual Baptist Church in Kyle, Texas. In 1954 he moved to Austin from Kyle to expand his company. His largest organ was built for Margarete B. Parker Chapel at Trinity University in San Antonio, Texas. In 1980, he was elected as the first American president of the International Society of Organbuilders. After a heart attack in 1988, Otto retired from organ building decided to do a little acting. He died at the age of 82.

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