He started in the now-defunct Southern Independent Collegiate Officials Association, which included teams such as Miami and Notre Dame.

Mike Pereira, the NFL's vice president for officiating, said "You can't teach the confidence and decisiveness with which he does things.

[3] Riveron was the crew chief for the 2011 AFC Championship game between the Baltimore Ravens and the New England Patriots, and was the alternate referee of Super Bowl XLVI.

[7] During the 2018 season, Riveron received criticism for the manner in which NFL officials implemented penalties for roughing the passer, which had been deemed an area of emphasis the previous off-season.

[8][9] Critics of the new emphasis on the rule included former NFL Vice President of Officiating Dean Blandino as well as Mike Pereira.

[10][11] Riveron admitted in an interview that at least two of the roughing the passer penalties applied the first week of the season had been called incorrectly.

[14][15] After the conference call, the competition committee issued a rule clarification, which led to a dramatic reduction in roughing the passer penalties in the following weeks.

[16] On September 19, 2019, New England Patriots quarterback Tom Brady tweeted that he was turning off the Thursday Night Football game because he couldn't watch the "ridiculous penalties" for offensive holding.