Considine was selected by the Philadelphia Eagles with the first pick in the fourth round (102nd overall) of the 2005 Draft. He made his NFL debut against the Chbiefs on October 2, 2005. As a rookie, Considine played in six games, mainly on special teams, before being placed on IR after a dislocated shoulder in the game against the Cowboys on November 14. He finished the season with eight special teams tackles after being inactive for first three weeks.
Considine played in all 16 games for the first time in his career in 2006, and started the last nine games of the season at strong safety in place of the previous starter, Micheal Lewis. Considine made a career-high 107 tackles (66 solo) and 26 special teams tackles, in addition to 1.5 sacks, one interception, two fumble recoveries and one forced fumble. He started at strong safety in the Eagles' wild card victory against the Giants, as well as the divisional playoff game against the New Orleans Saints, recording 13 tackles, including five solo, during the playoffs.
He started the first eight games in 2007 before he suffered his second season-ending shoulder injury. He still made 47 tackles (31 solo), and one interception during his shortened season, as well as two special teams tackles. He was replaced as the Eagles' starting strong safety.
Considine played in all 16 games in 2008 for the second time in four seasons. Primarily a special-teams player, he led the team with 32 special teams tackles. He finished the season with 11 tackles (five solo) on defense, one tackle for a loss. He played in all three of the Eagles' postseason games and finished with three special teams tackles.
Considine was not re-signed by the Eagles following the 2008 season and signed with the Jacksonville Jaguares on February 27, 2009. He started at strong safety in the Jaguars' 2009 season-opener against the Indianapolis Colts. He played in 11 games for the Jaguars, making six starts while battling injuries much of the season. Considine played in 14 games in 2010, starting in five, and recorded 52 tackles, one sack, and one interception.
The Carolina Panthers signed Considine to a one-year contract on July 28, 2011. He was released during final roster cuts on September 5th, but was re-signed on September 7th. He was released again on October 4, after playing in all four games for the Panthers.
The Arizona cardinals signed Considine on October 11, 2011, following an injury suffered by Kerry Rhodes.