Thomas Sonni
Founder & President

Tom Sonni founded Greater Mission in 2006 so that he might expand his life’s work, empowering the Church to live and share the greatest mission ever conceived: To know Jesus Christ and make Him known. Tom brings more than twenty-five years of experience designing stewardship models and managing capital campaigns along with years of experience in strategic planning, constituent research, annual appeals, major gifts, and legacy giving.


Tom has been a thought leader in the Church on matters of discipleship, stewardship and development, serving on the Board of the International Catholic Stewardship Council.


Tom has guided efforts that have raised over $400 million for the Church. His service has strengthened the Arch/Dioceses of Atlanta, Baltimore, Boston, Cincinnati, Cleveland, Lansing, Miami, Orlando, Palm Beach, Providence, Richmond, St. Petersburg, and Venice, among others. He led the creative design of With All Your Heart – a dynamic new mission advancement model that integrates spiritual formation and lifting parish communities to new levels of generosity to sustain and expand mission and ministry.

Before founding Greater Mission, Tom served as the executive leader of diocesan-wide development and stewardship programming in the Diocese of Harrisburg and the Archdiocese of Baltimore. Tom has been a thought leader in the Church on matters of discipleship, stewardship and development, serving on the Board of the International Catholic Stewardship Council. In addition to contributing articles to professional journals, Tom has frequently spoken at national and regional conferences. He also served on the board of Christlife, an international Catholic evangelization ministry.

Tom and his wife Sharon have been married for 34 years and live in Ellicott City, Maryland, where they raised two daughters who both also graduated from Pennsylvania State University. Tom collaborated with Cardinal William H. Keeler in writing a book on Eucharist testimonials entitled Real People Real Presence, founded an ecumenical prayer ministry, brought the Cornerstone parish retreat program to the Archdiocese of Baltimore, and actively leads a parish men’s group.

Prior to committing to full-time work in the Church over twenty-five years ago, Tom led The Business Support Group, a business development firm, and served as the co-publisher of the Central Penn Business Journal. Greater Mission has developed into a leading stewardship and development firm that exclusively serves the Church throughout the country.