Thanks to Alan Hirsh who's blog pointed me to this quote which i think summarizes well some the the role i feel called to take on and the open door embodies in the PCUSA.
"The apostolic role within established churches and denominations requires the reinterpreting the denomination’s foundational values in the light of the demands of its mission today. The ultimate goal of these apostolic leaders is to call the denomination away from maintenance, back to mission. The apostolic denominational leader needs to be a visionary, who can outlast significant opposition from within the denominational structures and can build alliances with those who desire change. Furthermore, the strategy of the apostolic leader could involve, casting vision and winning approval for a shift from maintenance to mission. In addition the leader has to encourage signs of life within the existing structures and raise up a new generation of leaders and churches from the old. The apostolic denominational leader needs to ensure the new generation is not “frozen out” by those who resist change. Finally, such a leader must restructure the denominations institutions so that they serve mission purposes.” - Steve Addison