John Hartley Daniels, Ph.D., 91, of Bethlehem, died Jan. 4, 2023, at home. Born in Regina, Saskatchewan, Canada, he was ason of the late Lewis J. Daniels and Leota C. (Skeels) Daniels of Calgary, Alberta, Canada. He was the husband of A. Rose Daniels for 66 years.

He attended Crescent Heights Matriculation HS, Calgary, Alberta. He graduated with distinction with a B.S. degree in civil engineering from the University of Alberta, Edmonton, Alberta, Canada. He earned a master’s degree in civil engineering from the University of Illinois and a doctorate in civil engineering from Lehigh University, Bethlehem.

He was a resident bridge engineer with the Bridge Branch of the Alberta Department of Highways for the Province of Alberta. He was creator and head of the Structural and Geotechnical Engineering Division of Associated Engineering Services Limited (AESL) in Edmonton, Alberta, Canada. He was a professor with Lehigh University’s Department of Civil Engineering and operated a private forensic structural engineering consulting practice. He retired in 1991 from Lehigh University as an emeritus professor. He and continued as an adjunct professor and maintained a full-time private forensic structural engineering consulting practice.

From 2001 to 2007, he was a ruling elder on session and the clerk of session of the First Presbyterian Church of Bethlehem (FPCB) a PC(USA) community. He later joined Grace Church Bethlehem, a Covenant Order of Evangelical Presbyterians community.

He was a registered professional engineer in the state of Pennsylvania and Province of Alberta, Canada; a member and past president of the American Society of Civil Engineers, Lehigh Valley Section; and a member of the Federal Transportation Research Board. He authored and coauthored over 125 structural engineering research reports and publications and contributed to two structural engineering technical books. He lectured on historic covered timber bridges to Road Scholars (Elderhostel) at the Pilgrim Pines Conference Center in Swanzey, New Hampshire. He was a member and past president of the American Society of Civil Engineer, Lehigh Valley Section, and a member of the Federal Transportation Research Board.

He was a Freemason and was Worshipful Master of Bethlehem’s H. Stanley Goodwin Lodge No. 648 ; High Priest of Bethlehem’s Ezra Royal Arch Masonic Chapter No. 216; a member of the Bethlehem Council No. 36 Royal and Select Master Masons; and was a 32nd degree Freemason. He was a life member of the Lehigh Consistory, Valley of Allentown; and a Noble of the Rajah Shrine in Blandon. He was a private pilot from 1954 to 1996, piloting airplanes in Canada and the USA mainly for professional and academic travel and for recreational purposes. He held private pilot’s licenses in Canada and the USA and VFR day and night ratings for seven types of single engine aircraft in the USA.

He played classical and ragtime piano, gardened, and studied the latest developments in cosmology, relativity theory, QED and quantum mechanics.

In addition to his wife, he is survived by two sons, Dr. Byron J. and wife Annette of Acworth, Georgia; and Scott H. and wife Janken of Mineral Bluff, Georgia; a daughter, Diane A. of Bethlehem; a grandson, Colin Daniels Esq., and wife Carly; a granddaughter, Dr. Clara Daniels; a grandson, Alexander; a grandson, Roland and wife Lauren; a great-granddaughter, Willow Rose; and a niece, Christina (Marc) Tortorelli and family of Calgary, Canada.

He was predeceased by a sister, Gwendolyn Code of Calgary, Canada.

Contributions may be made to the Shriners Hospitals for Children or to a charity of one’s choice.

Arrangements were made by Cantelmi Long Funeral Home Inc., Bethlehem.