Luis Tellez is a “numerary” in the sect of Opus Dei. According to spitfirelist.com, numeraries are “considered the most conservative of the sect’s members – they are unmarried, celibate, devote every aspect of their lives to their spiritual beliefs and turn over their salaries from their secular jobs to Opus Dei.”
According to the Daily Princetonian, Luis Tellez lives at the Mercer House on Princeton’s campus, which is “the hub for Opus Dei activities in the area.” The paper also reports that from 2000-2005, “the organizations affiliated with Tellez and Opus Dei have contributed more than $300,000 to university professors and programs…” with the bulk of the money going to the James Madison Program. The James Madison Program was founded by the chairman emeritus of NOM’s board, Robert George, and Tellez sits on its advisory council.
Luis Tellez is president of the Witherspoon Institute, also located in Princeton, which supports research and “the formation of the next generation of scholars” who oppose same-sex marriage and champion other conservative issues. In fact, a paper by the Institute entitled “Marriage and the Public Good: Ten Principles” was used by Senator Sam Brownback in pushing the Marriage Protection Amendment on the Senate floor in 2006.
Tellez is also an advisory board member of the Love and Fidelity Network, a student-focused conservative "values" group that is associated with NOM.
From RegnerusFallout.org, a project of the Human Rights Campaign: Initially Tellez authorized about $1 million to fund the New Family Structures Study (aka "The Regnerus Study"), but later that money was reduced to about $700,000. In approaching the Lynde and Harry Bradley Foundation in a fundraising letter in April 2011, Tellez explained that the intention of the study was to affirm the notion that same-sex parenting is bad for children as an argument against same-sex marriage. Tellez told Regnerus early on in the project that he wanted the study to be produced quickly in time to influence any Supreme Court decisions on same-sex marriage.