He lived first in Sayreville, New Jersey and moved to Old Bridge Township, where he attended Madison Central High School, from which he graduated in 1979.

[5] He studied at Rutgers University, interning at the ABC television network before graduating in 1983 with a degree in advertising and public relations.

[7] In 1985, Nicieza joined the staff at Marvel Comics, initially as a manufacturing assistant,[citation needed] later moving to the promotions department as an advertising manager.

This led to fill-in work on titles such as Classic X-Men, for which he provided backup stories, and in the Marvel Annuals' 1989 summer crossover "Atlantis Attacks".

After Tom DeFalco, then Marvel's editor-in-chief, created the superhero team the New Warriors, using existing characters, in Thor No.

"[9] Collaborating with pencilers Mark Bagley and later Darick Robertson, primarily, Nicieza went on to write the title for most of its first 53 issues (July 1990 – November 1994).

Nicieza's projects in this period included the first four issues of National Football League-approved superhero NFL SuperPro (Oct. 1991 – Feb. 1992), and, with penciler Kevin Maguire, the four-issue miniseries Adventures of Captain America (also known by its cover-logo treatment, The Adventures of Captain America: Sentinel of Liberty) (Sept. 1991 – Jan. 1992), an origin-story retelling set in the 1940s.

He also worked for Twist and Shout Comics writing and pencilling back-up stories in X-Flies Special #1 and Dirtbag #7.

Nicieza as editor oversaw the new version, dubbed "VH2", which re-imagined characters such as Solar, X-O Manowar, and Ninjak.

Turok met with success as a video game adaptation, and Nicieza was promoted to president and publisher of Acclaim Comics in 1997.

He continued to write the book (initially with old partner Mark Bagley on art, later with Patrick Zircher and Chris Batista) up until No.

The revamp was unsuccessful, and in 2004 the original version of the team was resurrected, initially in an Avengers/Thunderbolts miniseries, then later in the New Thunderbolts series with Nicieza again as writer.

2, as well as the short-lived ongoing series Hawkeye (2003); while at DC, he wrote the six-issue miniseries Supermen of America (1999) and the Elseworlds project JLA: Created Equal (2000), as well as some issues of the children's comic Justice League Adventures.

In 2003 Nicieza co-created, with artist Stefano Raffaele, the horror miniseries The Blackburne Covenant, published by Dark Horse Comics.

He is also one of the co-writers for The 99, an "Islamic culture-based comic book" with Kuwaiti Naif Al-Mutawa,[10] Other late-2000s DC work includes Nightwing and Robin,[11][12] both titles being cancelled in connection with "Batman R.I.P."

and Nicieza then wrote an Azrael : Death's Dark Knight mini-series, part of the Battle for the Cowl storyline which dealt with the "Batman R.I.P."

[17] In 2023, it was announced that Nicieza would be returning to the X-Men line of books to write the fifth volume of Cable, as a four-issue mini-series beginning in January, 2024.