He began working at DC Comics as an associate editor on August 3, 1987, a date he almost forgot, thinking it was August 10.
The Daredevil writer recalled his first day in the office on his blog.
"I wore my one suit to work that day (for the only time ever)," wrote Waid.
"It was raining that morning, but that didn't make it any cooler outside in August in New York. I had no umbrella. It was a wool suit. And I wasn't sure how the subways worked and ended up getting out about 30 blocks downtown.
"By the time I walked into 666 Fifth Avenue, I looked like a bar rag. Nonetheless, Ruthie the receptionist buzzed me in and Dick Giordano showed me to my desk...
"If you're wondering what an Associate Editor does - or did in 1987 - I'll list my job duties those first two days. Ready? Here we go: I erased Green Arrow pages. Eight hours a day for two days."
Before the advent of digital, all pencil lines had to be erased after the inker had done their work.
The legendary Kingdom Come writer recently received three Eisner Awards for his work on Marvel Comics' Daredevil.
He has launched a new webcomics portal, Thrillbent, and is expected to write a new Hulk title with artist Leinil Francis Yu for the Marvel NOW! initiative.