WHO WE ARE

OUR SESSION

We are a congregation committed to glorifying God in our worship  both on Sundays and in our daily callings throughout the week. We are a congregation of the Orthodox Presbyterian Church. Our public worship is God-centered, biblical, joyful, and thoughtful.

Our teaching focuses on the Bible, proclaiming, explaining, and applying God’s word for salvation, faith, and life. We gather for worship as a fellowship on Sunday but we also believe worship embraces all of life and that what we hear in church should transform the way we live throughout the week. We strive to demonstrate the mercy of God in practical ways—watching over, praying for, and serving one another, and ministering to the needy inside and outside the church.

We uphold the Westminster Confession of Faith and Catechisms as a faithful summary of what the Bible teaches.   We believe that humanity has rejected God and plunged itself into rebellion against Him. But God in his love for us has given us his Son, Jesus Christ, and through trusting him we find both forgiveness and freedom.

For more information on the OPC, please visit http://www.opc.org.

Robert Andrejczyk

Robert Andrejczyk

Robert Andrejczyk has been a member of Cornerstone since moving to the Philadelphia area in 2015. He is in his final year of the MDiv program at Westminster Theological Seminary and under care of the Presbytery of Philadelphia. Upon graduation, he intends to serve in full-time pastoral ministry. In the meantime, he works in the quality assurance department for a label manufacturer. He is married to Nayara, who produces podcasts for the Alliance of Confessing Evangelicals. They have two children, Laurita and Micaiah.
Sandy Finlayson

Sandy Finlayson

Elder Sandy Finlayson is Director of Library Services and Professor of Theological Bibliography at Westminster Theological Seminary.  Sandy has degrees from the University of Toronto, MLS, and Tyndale Theological Seminary, MTS. He is the author of; Thomas Chalmers, in the Bitesize Biography Series and Unity and Diversity: the Founders of the Free Church of Scotland.
 Sandy is married to Linda, who is the Administrative Assistant at Cornerstone and the author of books for children. They have one son.
Jesse Light

Jesse Light

Jesse Light has been a member of Cornerstone since 2014. Jesse graduated from Temple University with a major in Elementary Education and is currently a middle school science teacher. He married his wife, Rachel, in 2003 and they have five children: Cora, Owen, Edwin, Calvin, and Katarina. Jesse enjoys learning about all things related to theology and history, hiking, bicycling, and obsessively photographing clouds and sunsets.
Tom Sorkness

Tom Sorkness

Elder Tom Sorkness has been an ordained elder in the OPC for more than twenty years. He and his family began attending Cornerstone Presbyterian Church (then Gwynedd Valley OPC) in 2006. Tom has been at various times both a history teacher and administrator at Philadelphia-Montgomery Christian Academy for the past 35 years. He and his wife Lois have eight children and 12 grandchildren. Both Tom and Lois serve on the planning committee for the Presbyterian Family Week held annually at Harvey Cedars Bible Conference in New Jersey.

Chad Van Dixhoorn

Chad Van Dixhoorn

Rev. Dr. Chad Van Dixhoorn (PhD, Cambridge University) is professor of church history and director of the Craig Center for the study of the Westminster Standards at Westminster Theological Seminary. He also serves as an honorary research fellow at the University of East Anglia, Norwich, UK. Van Dixhoorn has held a number of additional teaching positions and has also served as associate pastor at Cambridge Presbyterian Church (UK) and also at Grace Presbyterian Church (Vienna, VA) for nine years. Van Dixhoorn is happily married to Emily Van Dixhoorn and they have five children and a dog.  He is serving as Ministerial Advisor during the pastoral vacancy. 

OUR DEACONS

Josh Currie

Josh Currie

Josh is married to Bethany. They live in North Wales. Josh works at the Westminster Seminary Bookstore, and graduated from Temple University with a degree in English. Josh has been a member at Cornerstone since 2005.
Jeremy Keifer

Jeremy Keifer

Jeremy is a Commercial New Products Leader at Merck, where he has worked for 20 years in a variety of sales, marketing and IT positions. He holds an MBA from Villanova University and a B.S. in Business and Computer Systems from Grove City College. Jeremy lives in Chalfont his wife Cheryl and 3 children: Samuel, Lydia & William. The Keifers have been members of Cornerstone since 2014.
Mark Mosser

Mark Mosser

Mark grew up in Upper Bucks and Montgomery Counties. After graduating from college, getting married to Jean, and attending further college courses Mark spent four years in the US Navy including a year-long tour in Vietnam. Since 1973 they have been members of OPC congregations in eastern Pennsylvania including the Gwynedd Valley Church-the predecessor of Cornerstone. Mark was a deacon for about 15 years in one of the congregations. Mark was employed for almost forty years as an aerospace corrosion chemist retiring about four years ago. Jean and Mark have one child and two grandchildren.
Tim Roof

Tim Roof

Tim Roof has been tuning and repairing pianos for private residences and in concert settings since 1983. In 1999 he began his own piano service business. With a degree in Journalism, and as a book lover, he serves as Cornerstone’s librarian, and as an usher. Tim is married to Donna and they have three sons. The Roofs are one of the original charter member families of Gwynedd Valley Presbyterian Church (now Cornerstone), having attended the church since 1994.

Cornerstone is a congregation of the Orthodox Presbyterian Church.