In 2003, Mark DeYmaz and George Yancey met in Indianapolis, Indiana, at a conference for those interested in the multi-ethnic church. Billed as a national event, they otherwise observed that most in attendance were from the local area. Believing that emerging interest might not yet warrant a national conference, they purposed to host their own smaller, regional event the following year.

In the fall of 2004, then, the two led the first Mosaix conference in Dallas, Texas. Counting everyone, including the soundman, the administrative assistant and the facilities guy), a grand total of 30 folks attended! Yet, key connections were made with individuals from Dallas Seminary including Michael Pocock and Mark Heavener that led to both Mark and George speaking the following year at the 5th Annual Ethnic America Network (EAN) Conference in Dallas, Texas.

As God would have it, and in the very month (April 2005) of the EAN conference, both Mark and George were featured in separate articles published by Christianity Today, in an issue whose covered proclaimed, "All Churches Should Be Multiracial." Lending credibility to their involvement then, the two determined to use this platform to promote a second Mosaix conference later that year and, again, in the Dallas/Fort Worth area.

In addition, they met Jim Spoonts at the EAN conference that year. Jim had been one of the conference organizers and subsequent interaction with Mark and George led to a growing understanding and passion for the multi-ethnic church. Given his connections in Dallas/Fort Worth, Mark and George asked Jim to head the second Mosaix conference in November 2005; and this time, more than 100 people would attend!

By 2006, a growing number of individuals and churches were finding their way to the emerging network. Relational in nature, key pastors and church leaders were invited to meet over the next couple of years at a ranch outside of Dallas for further consultation and strategic planning. These meetings led to the official naming of the network, declared mission and vision statements, the formation of the developmental strategy and additional conferences being held in Little Rock, Arkansas (2006), Lancaster, Pennsylvania (2007) and Houston Texas (2007).

Beyond conducting its own events, MGN was increasingly being asked to plan and present entire tracks on the multi-ethnic church at larger more established national conferences, including EAN (Atlanta, GA 2006; St. Louis, MO 2008; Phoenix, AZ 2009), The National New Church Conference (Orlando, FL 2008, 2009), and the Christian Community Development Association Conference (Orlando, FL 2008). In 2007, Mark conducted the first MGN event ever conducted outside the United States, speaking in churches throughout Australia and conducting a seminar in Christchurch, New Zealand. And George’s book, One Body, One Spirit (InterVarsity Press, 2005) and Mark’s book Building a Healthy Multi-ethnic Church (Jossey Bass/Leadership Network, 2007) fostered growing credibility and interest in what is now recognized as the primary network for those interested in pursuing with passion the multi-ethnic church.

By the end of 2007, MGN was officially incorporated as a non-profit corporation in the state of Texas. Mark and George, together with Willie Peterson established MGN’s first governing board with Jim serving as the first Executive Director. With a vision to see 20% of all local churches achieve a minimum of 20% diversity in their membership by the year 2020 and 50% of all local churches achieve 50% diversity by 2050, the network has established big goals that will, quite literally, change the face and heart of the local church - for the sake of the gospel - in the 21st century.

In 2009, requests from denominational and church planting movement leaders opened doors for MGN to partner with and influence entire denominations and church planters in other networks by providing specialized training at bootcamps, conferences, and seminars throughout the country.

In 2010, the network was re-launched in cooperation with Erwin McManus and Mosaic Alliance. At that time, the Global Network part of the name was dropped so that the network might simply be referred to as Mosaix in the future.