The dark comedy stars Don Cheadle as Marty, a ruthless management consultant from a top firm.
According to Deadline, Schwartz has now joined the cast as Marty's colleague and close friend. Meanwhile, Lawson has signed up to play a Harvard-educated associate of Marty.
Schwartz has previously starred in shows including Undercovers and Parks And Recreation, while Lawson recently appeared in Romantically Challenged.
The pair join Dawn Olivieri, who will play Marty's ex-wife and business rival. Production on the pilot is expected to begin next month.