1945年赴美留學在普渡大學攻讀電機工程博士，1947年博士畢業。據張的前嶽父著名曆史學家洪業的通信記錄，1950年11月前張夫婦也曾考慮回國（猜測應該是大陸）。1952年張守廉到紐約大學做助理教授，1963年成為紐約州立大學石溪分校電機科學係主任。除了電機工程之電路設計理論外，其研究領域包括係統控製理論和電力係統理論。1966年，張成為 IEEE Fellow。1983年，鑒於他對服務和研究方麵的貢獻，紐約州立大學石溪分校晉升其為 Leading Professor，1991年張守廉在石溪分校榮休。
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Sheldon Shou-Lien Chang
“Sheldon S. L. Chang (IRE Senior Member 1953, and Fellow 1961) was born in China, on 20 January 1920. He attended Yenching University, Peking; National Southwest Associated University, Kunming; and Tsinghua University in Kunming, and received the B.S. and M.S. degrees in physics, in 1942 and 1944, respectively. He won a scholarship by competitive examination for studying electrical communication at Purdue University, Lafayette, Indiana, in 1945, and received the Ph.D. from Purdue, in 1947.
Chang was an Instructor at Purdue, from 1947 to 1948, and Research and Development Engineer with Robbins and Myers, Inc., Springfield, Ohio, from 1948 to 1952. He joined the faculty of New York University, in 1952, and held the rank of Professor of Electrical Engineering in 1962.
In 1962, Chang was an IRE Fellow as well as a member of AIEE, ASEE, the American Physical Society, Eta Kappa Nu, Sigma Xi, and Tau Beta Pi. ”
