Both received contract extensions with Kubiak's deal through 2014 and Smith through 2016.
"I believe it is very important to have stability within an organization, and it starts with leadership," McNair said in a team-issued statement. "We now have all of our key executives and coaches under long-term contracts. This includes (President) Jamey Rootes, (Vice Chairman/COO) Cal (McNair) and now (Executive Vice President/GM) Rick Smith and (Head Coach) Gary Kubiak. All four of these men are key components of our organization and I am pleased they will serve in leadership roles going forward.
"I feel this action gives us stability going forward and positions us to have many successful seasons for the Houston Texans."
Kubiak was handsomely rewarded for guiding the franchise to the AFC South title and first ever playoff appearance in 2011.
Hired along with Smith in January 2006, when they inherited a 2-14 team, Kubiak coached the Texans to only one winning season -- Houston went 9-7 in 2009 -- before taking the division with a 10-6 mark last season. He's 47-49 in the regular season and 1-1 in the playoffs.
"I think they've done an outstanding job. I'm pleased with them, and if that wasn't the case, we wouldn't be extending 'em," McNair said last month.