1954
Born to Robert D. Halladay and Mary Mae (Blough) Halladay in Lexington, KY.
1976
Earns a Bachelor of Science in physics from the University of Kentucky.
1976
Works as a rubber chemist for the Parker Seal Company (Now Parker Hannifin Corporation) in Lexington, KY, through 1979.
1979
Works as a corporate rubber chemist for the Masco Corporation in Taylor, MI, through 1981.
1981
Works as a manager of material and process engineering within the Seal Division of LORD Corporation in Shelton, CT, through 1983.
1984
Works as a staff engineer and senior staff engineer for the Mechanical Products Division of the LORD Corporation, in Erie, PA, through 2007.
1990
Joins the Northwest Pennsylvania Concert Band in Edinboro, PA, as a French horn player and continues in this role.
2007
Is a fellow of the LORD Corporation in Erie, PA, through 2013.
2013
Is senior fellow of the LORD Corporation in Erie, PA, through 2018.
2015
Co-authors “Sources of Hysteresis in Rubber Compounds” for the Rubber Division of the American Chemical Society, Paper 11.
2017
Wins the Don Alstadt Innovation Award.
2017
Writes technical paper “EPDM Plasticized with Polymeric Soybean Oil of Different Molecular Weights” for Rubber Chemistry and Technology.
2018
Retires from his profession.
2020
To date has contributed numerous articles to professional journals, chapters to books, and holds 18 US patents.