Rep. Rivero grew up in the part of the West Valley that is now part of District 21. He attended Peoria Elementary School, Peoria High School and Arizona State University where he earned a Bachelor's degree in Education and a Master's degree in Public Administration. 

In addition to his formal education, Rivero worked in the Peoria City Manager's office as well as other City Departments. Additionally he interned for former Senator Jon Kyl, and was a volunteer for Senator John McCain's 2008 presidential campaign. 

Rivero's extensive knowledge of the district, thanks to his time in public service, combined with his commitment to serve the voters of District 21, assists him in being an effective leader in the State Legislature.