Leon Mark Clancy

Leon Mark Clancy

May 09, 1946 - October 10, 2021
N. Chesterfield, Virginia

Leon Mark Clancy

May 09, 1946 - October 10, 2021
N. Chesterfield, Virginia


Leon Mark Clancy, born May 9, 1946, passed away on Sunday, October 10, 2021, at the age of 75 in his home in North Chesterfield, Virginia. He enjoyed his landmark 75th birthday with many family and friends. Leon passed peacefully in his sleep after living a full life. He was surrounded by his family at the time of his passing.

Leon achieved a Bachelor of Mechanical Engineering from the University of Washington. He pursued a life-long career across the engineering sciences, enjoying long-held positions at Boeing, Newport News Shipbuilding, Deepsea Ventures, NASA Langley, and Jefferson Labs.

Leon’s favorite pastimes include automobile maintenance, recreational bicycling, contra dancing, and cribbage. He had a passion to teach these skills to each new generation. His famous pancake breakfast has been enjoyed by many.

He is survived by his four children, daughter Shawn Miller of Newport News, Virginia; son Michael Clancy of Hampton, Virginia; son Jason Clancy of North Chesterfield, Virginia; and daughter Terry Scott of Spotsylvania, Virginia; and his sister Mary Scannavinno of Kennesaw, Georgia.

Leon was predeceased by his mother Mary Ellen Shelmadine and his father Mark Clancy; his brother, Terry Michael Clancy; and his niece Erika Scannavino.

The family will gather for a private celebration.

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5 responses to Leon Mark Clancy

  1. Tom Crockett says:

    Leon was a good friend and respected colleague during the time we worked together at the Institute for Computer Applications in Science and Engineering (ICASE) at NASA’s Langley Research Center. Leon’s role there was computer systems manager, one of the most talented I have ever known. He transformed the ICASE workstation network into a stable, efficient, and effective platform to support the myriad needs of ICASE’s resident researchers, visiting scientists, and support staff. Among other things, he established ICASE as one of the leading organizations in networking and computing technology at Langley, often deploying new technologies within ICASE well before they were adopted more widely at the Center. A particular challenge was the big surge of visiting scientists that would descend on ICASE every summer. Leon would spend months planning for that, and he and his assistants were always able to provide the needed computing support when the crunch came. Another memorable event was a pipe rupture in our building one weekend which resulted in several inches of water in the building. Some of the workstations and servers that were sitting on the floor were flooded but Leon carefully dried them out and I don’t think we actually lost any of them. On another occasion, the building air conditioning was down for maintenance during an unusually warm spell in October and temperatures rose well above the design specs for many of our systems. Leon was able to contain the damage from that incident, too, and kept us up and running until the weather cooled off and the A/C finally came back on. The ICASE systems administration model that Leon established was so successful that it was exported to research groups at several universities internationally, who retained Leon as a consultant to help them reorganize their own systems. The principles that I learned from Leon served me well in my subsequent role as the High Performance Computing manager at the College of William and Mary, as they did others who worked with him. Rest in peace, my friend. Your contributions were valuable and valued by many.

  2. Ken Evanson says:

    Bicycled many miles with Leon back in the early 1980s and roomed together briefly. I truly enjoyed Leon’s logical view across many subjects, both professional and personal. I’m saddened to hear of his passing.

  3. Leon was a very good friend and always had great advice. I worked at Jefferson Lab when he was there, and for a while we went on lunchtime walks. Mainly I knew Leon as a contra dancer. He served on the Richmond board for many years, and was responsible for running several major events that they held. I was honored when Leon came to my home town of Ely, in England, no less than three times for a contra dance week. During the last of these, in 2017, Leon served on the organizing board. For those unfamiliar with contra dancing, I found a local contra dance held at Norge Hall, near Williamsburg, VA, in which you can see Leon sitting against the wall at minutes 1:16 to 1:32 and again around 3:40.

    I will miss Leon enormously, but am grateful for the time that I spent with him.

  4. Such a kind, sweet man. Always willing to help. Leon, you will be greatly missed, by me and many, many others. Thanks for all you did for us. And for the waltzes. I hope you can dance freely now.

  5. clientsadmin says:

    Jill Joybelle VanSise Writes:

    To the family of Leon Mark Clancy
    I was so sorry to learn that Leon Clancy had died. He was very nice to me when I was going to TADAMS; he gave me a number of lifts home.
    I hope you can find some comfort in thinking of the life he lived, and the activities he enjoyed.

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