In 1964 he left Nevis to form the LeCroy Corporation, which specialized in the design and development of electronic instrumentation based on these techniques. The company grew from very small beginnings to become a worldwide leader in particle physics instrumentation, displacing several larger companies in this field.

The company continued to grow, and in 1995 went public, offering its shares on NASDAQ. Today, LeCroy Corporation is the acknowledged leader in high speed digital oscilloscopes, which are vital in the design of fast computer communication systems. It employs 450 people worldwide, with primary locations in Chestnut Ridge, New York and sales, service and development subsidiaries in the US and throughout Europe and Asia, including China, where it has a design and manufacturing partner.

Mr. LeCroy was instrumental in introducing  a Young Astronauts program to local elementary schools. This program engages both teachers and students alike in math and science through study of space exploration. He was President of the Board of the Helen Hayes Performing Arts Center in Nyack for many years, serving with Helen Hayes until her death in 1993.

Recently Mr. LeCroy has renewed an old passion for photography, and after several shows in New York City he and his wife have opened a gallery in Charleston, South Carolina.

Mr. LeCroy has been active in classical liberal causes for some years. He served on the board of the Foundation for Economic Education for many years, and one year as its Chairman. He and Dori, with Ben Rast, are co-founders of the Bastiat Society.

Today, Mr. LeCroy lives in Charleston with his wife Dori, a psychologist who writes and teaches in the field of evolutionary psychology. They count between them five children, three grandchildren, two parrots, a dressage horse, and two dogs. Only the dogs and parrots live at home.