He was the chief editorial cartoonist at the Boston Globe from 1967 to 2001 and has been syndicated to hundreds of newspapers worldwide.
The Society of Professional Journalists/Sigma Delta Chi (SDX) honored him twice with its Distinguished Service Award for Editorial Cartooning (1973 and 1976).
Szep was a strong opponent of the Vietnam War and his cartoons on Edward King, the governor of Massachusetts, resulted in his being sued for libel.
His son, Jason Szep (born 1969), a Reuters journalist, also won a Sigma Delta Chi Award (2007) and a Pulitzer Prize for International Reporting (2014).
[2] In 2010, a putter discarded by Szep and sold at a discount golf store was bought for $39 by Jim Furyk, who won the $11 million FedEx Cup tournament with it.