Since the end of his creator-owned teen drama series The Waiting Place, which was published from 1997 to 2002, he has written several series for Marvel Comics, including The Incredible Hulk, Sentinel, Mary Jane, Inhumans and Gravity.

In 2005, he won an Eisner Award for Talent Deserving of Wider Recognition.

He has written for the monthly comic books Gravity, Marvel Adventures Spider-Man, Sentinel and Spider-Man Loves Mary Jane, all for Marvel Comics, and on January 9, 2007, DC Comics announced that McKeever had signed an exclusive contract with the publisher. He was a part of the writing team working on DC's weekly series Countdown, and took over for Gail Simone as the writer of Birds of Prey after issue #112, however, his last issue was #117 due to time constraints with deadlines. Sean also took up writing duties on Teen Titans with the double sized August issue #50 and also wrote the Terror Titans limited series that spun off from this. His run on Teen Titans has ended with issue #71, although he has continued with a Ravager back-up story starting in #72.

It was announced at Wizard World Philadelphia 2009 that McKeever, no longer under exclusive contract to DC, would write the limited series Girl Without a World for Marvel Comics and this led into Young Allies a new series and team formed after the Heroic Age line-wide reboot, all with artist David Baldeon.

McKeever is also wrote a new story for The Waiting Place illustrated by Mike Norton. The story was printed in The Waiting Place: The Definitive Edition from IDW Publishing.

Comics

Self-published

• Counter 24-hour comic
• Looking at the Front Door
• The Meredith Club

Anarchy

• Vampi: Vicious #1-3

Caliber

• Negative Burn #30, 38, 44

DC Comics

• Birds of Prey #113-117
• Countdown Presents: The Search for Ray Palmer: Crime Society #1
• Countdown to Final Crisis #47, 42, 39, 35, 31, 27, 18, 4, 3 & 2
• Teen Titans #50-71, Annual 2009 #1 (Ravager co-feature from #72-80)
• Terror Titans #1-6 (Limited Series)
• Titans #11-13

Devil's Due

• Frontline #9-10

Marvel Comics

• Amazing Fantasy vol. 2 #15
• The Official Movie Adaptation
• Firestar #1-
• Gravity #1-5 (limited series)
• Incredible Hulk #26, 30-32
• Inhumans vol. 6 #1-12
• Marvel Age Fantastic Four #1-4
• Marvel Double Shot #3
• Marvel Adventures Spider-Man #5-12
• Mary Jane #1-4 (limited series)
• Mary Jane: Homecoming #1-4 (limited series)
• Mega Morphs toy insert mini-comics (6 total)
• Mega Morphs #1-4 (limited series)
• Mystique #14-24
• Girl Without a World (with David Baldeon, 4-issue limited series, 2008)
• Sentinel #1-12
• Sentinel vol. 2 #1-5 (limited series)
• Spider-Girl #51
• Spider-Man Family #1-2
• Spider-Man Family Featuring Spider-Man's Amazing Friends
• Spider-Man Loves Mary Jane #1-20
• Ultimate X-Men #75 (backup story)
• Young Allies (with David Baldeon, ongoing series, 2010-)
• X-Men Origins: Jean Grey

Sirius

• Tower

SLG

• Waiting Place, The #1-6
• Waiting Place, The vol. 2 #1-12

Graphic novels & Collected editions

About Comics

• 24 Hour Comics All-Stars (Softcover) (ISBN 0-9753958-4-X)

DC Comics

• Birds of Prey: Metropolis or Dust (Softcover) (ISBN 978-1-4012-1962-8)
• Countdown to Final Crisis vol. 1 (Softcover) (ISBN 978-1-4012-1789-1); vol. 2 (Softcover) (ISBN 978-1-4012-1824-9); vol. 3 (Softcover) (ISBN 978-1-4012-1911-6); vol. 4 (Softcover) (ISBN 978-1-4012-1912-3)
• Countdown Presents: The Search for Ray Palmer (Softcover) (ISBN 978-1-4012-1798-3)
• Teen Titans vol. 8: Titans of Tomorrow (Softcover) (ISBN 978-1-4012-1807-2)
• Teen Titans vol. 9: On the Clock (Softcover) (ISBN 978-1-4012-1971-0)
• Teen Titans vol. 10: Changing of the Guard (Softcover) (ISBN 978-1-4012-2309-0)
• Teen Titans: Deathtrap (Softcover) (ISBN 978-1-4012-2509-4)
• Terror Titans (Softcover) (ISBN 978-1-4012-2294-9)
• Titans: Lockdown (Softcover) (ISBN 978-1-4012-2476-9)

Devil's Due

• G.I. Joe: Frontline vol 4 - One-Shots (Softcover) (ISBN 1-932796-21-5)
• Lloyd Kaufman Presents: The Toxic Avenger And Other Tromatic Tales (Softcover) (ISBN 978-1-932796-90-2)

IDW Publishing

• Waiting Place: The Definitive Edition, The (Softcover) (ISBN 978-1-60010-526-5)

Marvel Comics

• The Official Movie Adaptation (Softcover) (ISBN 0-7851-1713-X)
• Gravity: Big-City Super Hero (Digest) (ISBN 0-7851-1798-9)
• Inhumans vol 1: Culture Shock (Digest) (ISBN 0-7851-1755-5)
• Marvel Age Fantastic Four vol 1: All For One (Digest) (ISBN 0-7851-1468-8)
• Marvel Adventures Spider-Man vol 1 (Hardcover) (ISBN 978-0-7851-2432-0)
• Marvel Adventures Spider-Man vol 2: Power Struggle (Digest) (ISBN 0-7851-1903-5)
• Marvel Adventures Spider-Man vol 3: Doom With a View (Digest) (ISBN 978-0-7851-2000-1)
• Mary Jane vol 1: Circle of Friends (Digest) (ISBN 0-7851-1467-X)
• Mary Jane vol 2: Homecoming (Digest) (ISBN 0-7851-1779-2)
• Mega Morphs (Digest) (ISBN 0-7851-1868-3)
• Mini Marvels: Secret Invasion (Digest) (ISBN 978-0-7851-3717-7)
• Mystique vol. 3: Unnatural (Softcover) (ISBN 0-7851-1556-0)
• Mystique vol. 4: Quiet (Softcover) (ISBN 0-7851-1475-0)
• Sensational Spider-Man: Back in Black (Hardcover) (ISBN 978-0-7851-2920-2); (Softcover) (ISBN 978-0-7851-2997-4)
• Sentinel vol 1: Salvage (Digest) (ISBN 0-7851-1380-0)
• Sentinel vol 2: No Hero (Digest) (ISBN 0-7851-1368-1)
• Sentinel vol 3: Past Imperfect (Digest) (ISBN 0-7851-1914-0)
• Spider-Man Family vol. 1: Back in Black (Digest) (ISBN 978-0-7851-2626-3)
• Spider-Man Loves Mary Jane vol 1 (Hardcover) (ISBN 978-0-7851-2610-2)
• Spider-Man Loves Mary Jane vol 2 (Hardcover) (ISBN 978-0-7851-3083-3)
• Spider-Man Loves Mary Jane vol 1: Super Crush (Digest) (ISBN 978-0-7851-1954-8)
• Spider-Man Loves Mary Jane vol 2: The New Girl (Digest) (ISBN 978-0-7851-2265-4)
• Spider-Man Loves Mary Jane vol 3: My Secret Life (Digest) (ISBN 978-0-7851-2266-1)
• Spider-Man Loves Mary Jane vol 4: Still Friends (Digest) (ISBN 978-0-7851-2564-8)
• Spider-Man: Amazing Friends (Digest) (ISBN 978-0-7851-3764-1)
• Ultimate X-Men vol. 8 (Hardcover) (ISBN 978-0-7851-3080-2)
• Ultimate X-Men vol. 16: Cable (Softcover) (ISBN 978-0-7851-2548-8)
• X-Men Origins (Hardcover) (ISBN 978-0-7851-3451-0)
• Young Inhumans (Softcover) (ISBN 978-0-7851-3382-7)

SLG

• Waiting Place Book One, The (Softcover) (ISBN 0-943151-36-8)
• Waiting Place Book Two, The (Softcover) (ISBN 0-943151-53-8)
• Waiting Place Book Three, The (Softcover) (ISBN 0-943151-76-7)

Comic strips

• Crankshaft 5/15/2006-5/20/2006 (uncredited writer)
• Funky Winkerbean 4/10/2006-4/15/2006; 4/17/2006-4/22/2006; 5/22/2006-5/27/2006; 5/29/2006-6/3/2006; 6/19/2006-6/24/2006; plus an additional 10 weeks, Monday-Saturday (uncredited writer)

Marvel

• Alaris (with Matt Clark) first appeared in Inhumans vol. 6 #1
• Aftershock (with Casey Jones) first appeared in Spider-Girl #51
• Andy Anderson (with Patrick Scherberger) first appeared in Marvel Adventures Spider-Man #7
• Black Death (with Mike Norton) first appeared in Gravity #1
• Brushfire (with Mike Norton) first appeared in Gravity #5
• Helena Carlson (with Manuel Garcia) first appeared in Mystique #14
• Gravity/Greg Willis (with Mike Norton) first appeared in Gravity #1
• Intello (with Mike Norton) first appeared in Marvel Adventures Spider-Man #11
• Jolen (with Matt Clark) first appeared in Inhumans vol. 6 #1
• Positron (with Kristian Donaldson) first appeared in Amazing Fantasy vol. 2 #15
• San (with Matt Clark) first appeared in Inhumans vol. 6 #2
• Juston Seyfert (with UDON) first appeared in Sentinel #1
• Lauren Singh (with Mike Norton) first appeared in Gravity #1