He is the special teams coordinator and defensive backs coach for Gannon University, positions he has held since 2024.

Johnson played his high school ball (and basketball) at Mercyhurst Prep in Erie, Pennsylvania, graduating in 2002.

He was signed by the Pittsburgh Steelers after cornerback Chidi Iwuoma and linebacker Richard Seigler were placed on injured reserve.

Johnson was signed by the Winnipeg Blue Bombers of the Canadian Football League in April 2008 and started 17 of 18 games during the 2008 CFL season.

[3] After only one game, it was found out that there was a clause in Johnson's contract with the Winnipeg Blue Bombers that prevents him from playing with any other team.

[8] He won the award as the standout player on a team full of talented defensive backs who led the league in fewest passing yards allowed, holding opponents to the lowest pass completion percentage, and led the league with most team interceptions.

The next year, however, the Redblacks finished first in the CFL East Division and Johnson was named an Eastern All-Star for the fifth time in his career.

Johnson was released by the Alouettes on June 17, 2017 as teams trimmed their rosters down to 46 players for the start of the season.

[14] Johnson dressed for all 18 games for the Riders and contributed with 39 defensive tackles, two interceptions and one forced fumble.