The club's hierarchy came under criticism for the team's poor performance in the 2013 season as they finished with a 4-12 record, just a year after competing in the NFC championship game.
However, Falcons owner Arthur Blank believes that the team is in the best possible hands and as a result has handed a four-year deal to McKay and one-year extensions for Dimitroff and Smith.
"We are fortunate to have talented key leaders at the Falcons who are dedicated to a common goal of being a league leader on and off the field," Blank told the club's official website.
"I have great respect for the skills and commitment of Rich, Thomas and Smitty, and I look forward to continuing to support and work with them in the years to come."
The trio have been in their respective roles since the 2008 campaign.