Lemire is currently the writer and artist for Sweet Tooth, which falls under the DC Comics imprint Vertigo.
He will begin by taking on the character Atom in a back-up feature within DC’s long-running title Adventure Comics before working on the recently returned Conner Kent in a new ongoing Superboy series.
"I felt that if I was going to do superhero work, I would like to commit to DC," Lemire told CBR. "I've always been a DC fan."
Of what he will bring to the projects, Lemire revealed that he has created a new villain for The Atom.
"It's going to be something that has tied into his past and his future so it's going to set them up as a new force in the DC Universe."
The news comes only weeks after British writer Paul Cornell announced he has also signed exclusively with the publisher after working on various Marvel Comics projects for the past year.