Bernard Rosen, a certified public accountant who lived in Melville for more than a half-century, worked and took professional development classes until he was 89.
"He loved numbers, and he loved helping people," said his daughter, Bonnie Rosen, 49, of Melville. "That's what kept him going."
He died Jan. 29 of pneumonia complications. He was 92.
Rosen grew up in East New York, Brooklyn, and attended City College. During World War II, he served in the Army, and as a sergeant was stationed in Panama, the family said.
Rosen and his wife, Lillian, moved to Melville in the 1950s, buying a new home on what had been a potato farm.
He became a partner in the Manhattan accounting firm of Kramer & Rosen, and later started his own firm in Woodbury, which he ran until his retirement in December 2011. Until then, he was still taking continuing education classes in his field, Bonnie Rosen said.
A lifelong Yankees fan, Rosen earned laughs telling jokes and played tennis until his mid-80s, when spinal surgery ended the hobby. In his prime, at 6 feet, 190 pounds, he was known as the "tennis tiger," Bonnie Rosen said.
As a father, he held high academic standards, she said.
"My dad always stressed school and was tough with us. If you got a 95, he'd say 'See, if you studied a little more, you would have gotten 100,' " Rosen said.
"He was strict, but my dad was always there for his children," she said.
Rosen said her father doted on Lillian, whose 93rd birthday is Monday. They enjoyed touring Europe during their 72-year marriage.
Survivors include two other daughters and a son; seven grandchildren; and eight great-grandchildren. Burial was at Mount Golda Cemetery in South Huntington.