Colin Marshall has spent over 30 years training men and women in the ministry of the gospel, both in university and local church contexts. He is a graduate of Moore Theological College, Sydney, and is a consultant with Vinegrowers. In addition to being a co-author on The Trellis and the Vine, he is the author of Growth Groups, a training course for small group leaders, and Passing the Baton, a handbook for ministry apprenticeship.
Tony Payne is a ministry trainer and writer based in Sydney, Australia. He is the author or coauthor of over 30 books and resources, including The Trellis and the Vine (Matthias Media, 2009) and the Two Ways to Live range of resources. His most recent book is Learn the Gospel (Matthias Media, 2022).