Bio given on his appointment. WT, 15th March 2006, p.26.
Brother Jackson started pioneering in February 1971 in Tasmania, the island state of Australia. In June 1974, he married Jeanette (Jenny). Shortly thereafter, they were appointed to serve as special pioneers. From 1979 to 2003, they served as missionaries in Tuvalu, Samoa, and Fiji—island nations in the South Pacific. While in the islands, Brother and Sister Jackson also contributed much to the work of translating Bible literature. Beginning in 1992, Brother Jackson served on the Branch Committee in Samoa, and from 1996, on the Branch Committee in Fiji. In April 2003, he and Jenny became part of the United States Bethel family and began to work in the Translation Services Department. Soon thereafter, Brother Jackson was made a helper to the Teaching Committee of the Governing Body.
What the teaching committee does, WT, 15th May 2008, p.29
TEACHING COMMITTEE: This committee oversees the instruction provided at assemblies, conventions, and congregation meetings. It arranges spiritual programs for Bethel family members and has oversight of various schools, such as Gilead School and the Pioneer Service School, as well as of the development of audio and video programs.
According to O'Brien, today, in testimony to counsel for the commission, Jackson is now on the Writing Committee, which does cover translation work but also a lot more.
From WT, 15th May 2008, p.29
WRITING COMMITTEE: It is the responsibility of this committee to supervise the putting of spiritual food into written form for publication and distribution to fellow believers and the general public. This committee answers Bible questions and approves such material as drama scripts and talk outlines. It also oversees the translation work done worldwide.