As a social advocate, Ruiz began working on  issues disproportionately impacting minority groups during his college years. At Harvard, he was elected to the student council four years in a row. He worked on the issue of increasing minority faculty in tenured positions on a committee with the Dean of Harvard College.

Within his advocacy marketing firm, Ruiz has worked on a range of issues, from financial literacy to the elimination of health disparities.

Ruiz has also been an advocate for comprehensive immigration reform, universal healthcare, and regulations to curb the impact of sugary drinks and fast food on obesity, writing numerous op-eds and columns as a Contributor to His columns have appeared in major newspapers across the country, including the Houston Chronicle and Philadelphia Inquirer.

Ruiz has served as a member of the Board of Directors of CSPI (Center for Science in the Public Interest), a national thought leader on issues of nutrition.