Pippert is an internationally known speaker who regularly lectures on spiritual renewal, evangelism and character formation for church conferences, at schools and colleges and in pastoral training seminars. She has also written several popular books on evangelism and Christian living. Her bestselling book Out of the Saltshaker has sold more than a half-million copies worldwide. Siemens spent twenty-one years pioneering IFES (International Fellowship of Evangelical Students) campus fellowships in Latin America and Europe, and founded Global Opportunities, which helps missions-motivated Christians support themselves abroad as they integrate work and witness.