Louis Samuel Isabella, 68, of Allison Park, Pa., passed away unexpectedly on Wednesday, Sept. 30, 2026.

Born July 2, 1958, in Butler, he was the son of the late Paul D. Isabella and Mary R. Zuccala Isabella.

Lou graduated in 1980 from Youngstown State University with a bachelor's degree in chemical engineering and three minor degrees in mathematics, chemistry, and nuclear engineering. He went on to obtain a certificate in computer programming in 1983.

Lou was employed for more than 20 years as an information technology engineer at Highmark. He also worked as an investment broker.

He firmly embraced his Italian heritage, and he was fluent in the Italian language.

Visiting his loving family gave Lou the greatest joy.

He is survived by his sister, Marisa Mondi and her husband, Dan, of Bloomingdale, Ill.; two nephews, Peter Mondi and his wife, Rachel, of Geneva, Ill., and Paul Mondi and his fiancée, Elise Johnson, of Glendale Heights, Ill.; one niece, Jeanna Saavedra and her husband, Lorenzo, of Seattle, Wash.; three great-nephews, Oliver Mondi, Jamie Mondi, and Evan Saavedra; and one great-niece, Isabella Saavedra.

He was preceded in death by his beloved parents.

There will be no visitation.

A Mass of Christian Burial will be celebrated at 10 a.m. on Monday, Oct. 19, at All Saints Parish, St. Michael the Archangel Roman Catholic Church, 432 Center Ave., Butler, with Rev. Kevin C. Fazio officiating.

Burial will take place in St. Michael's Cemetery.

Arrangements were entrusted to the care of Martin Funeral Home South Side, 429 Center Ave., Butler.