The four members of our Executive Team have a combined 51 years experience in NSP, equipping students as leaders for Christ.  

  • Warren Willis

    CEO & FOunder

    Warren Willis has 52 years experience in evangelistic movements internationally. He began his ministry with Cru, formerly Campus Crusade for Christ, in the 60's at UC Berkeley. His work training leaders for evangelism took him to Guam, Canada, and Brazil. His final assignment with Cru was in Mongolia; when he arrived, there were four known believers in the country. Today, over 40 Mongolians are on full-time staff carrying on the work he began.

    After 44 years with Cru, Warren turned his attention to reaching America for Christ. He founded the California School Project in 2002 at Biola University and continues to lead our team into the mission ahead of us. 

    As of January 2017, Warren has delegated the role of president to Mark Hopson but will continue in his role as CEO. Click here to learn more. 

  • Mark Hopson


    Mark joined the team in 2003 as a student at Biola University. After graduating from Biola in '06, he joined full-time staff and served as Director for the Greater Los Angeles Area until moving with his family to Chicago in 2013. Mark has a M.A. in New Testament from Talbot School of Theology. He and his wife Shelley have 2 young girls and a baby boy.

    As of January 2017, Mark is serving as the President of the National School Project. Click here to learn more. 

  • Kellee Popp

    Development DIRECTOR

    Since joining as a volunteer while a Biola student in 2004, Kellee has been a Logistics Director, Cluster Leader, HomeTown Director (short term missions), and Training Director, overseeing the development of our high school training curriculum - the Outreach Guide. After leading the California School Project as the first state director for three years, Kellee now is heading up fund development.

  • Ben Flemming


    Ben started as a campus mentor in 2004 while at Biola University and came on staff in 2008. He's served in campus ministry for several years, but began his current role in charge of the central office in 2010.