Preaching Christ in the East Valley Since 1985


Grace Covenant Church (GCC) was conceived as the result of a church-planting effort by Church of the Redeemer, in Mesa, AZ. In 1985, John Giarrizzo, a former real estate agent and 1984 Redeemer Seminary graduate, was approved by the church and formally commissioned as Organizing Pastor for the new venture. Grace Covenant held its first worship service in a rented banquet hall in west Mesa on September 8, 1985.

The first year of GCC’s existence was exciting yet challenging as it sought to establish both a doctrinal position and identity as a Reformed Baptist congregation. In 1987, GCC established its own constitution, adopted the 1689 Confession of Faith, and constituted its church membership with 28 charter members.

The next few years were marked by slow growth and waiting on the Lord to provide a permanent location.


By 1992, God led GCC to a location along the two-lane Greenfield Road in what was then a rural farming community. The property had previously been a private residence that was already converted to a meeting facility large enough to serve as a school and church. The Lord granted GCC the ability to rent and eventually purchase this property that exists as its current home in Gilbert.

In 1997 Grace Covenant joined the Association of Reformed Baptist Churches of America (ARBCA) as a charter member.

Since June 2002 GCC has continued to expand its facilities little-by-little as God has blessed the congregation with growth.

In 2007, GCC established Building Tomorrow’s Church, a nation-wide conference ministry for like-minded young adults, which continues to gather annually for the purpose of strengthening local churches by encouraging the next generation of Christians.

In January 2012, GCC called and sent Rob Cosby to plant a church in Tucson, Arizona. Tucson Reformed Baptist Church (TRBC), as the work has come to be called, constituted in November 2013. TRBC continues to shine the light of Christ in a dark place.

We thank the Lord for His mercy and faithfulness to this body of believers thus far and pray for His gracious guidance in the future.

“Not to us, O LORD, not to us, but to your name give glory, for the sake of your steadfast love and your faithfulness!” Psalm 115:1