Was just checking the jw-media.org website and found this:
How we are organized
Following the model of first-century Christianity, Jehovah’s Witnesses have no clergy-laity division. All baptized members are ordained ministers and share in the preaching and teaching work. Witnesses are organized into congregations of up to 200 members. Spiritually mature men in each congregation serve as elders. A body of elders supervises each congregation. About 20 congregations form a circuit, and about 10 circuits are grouped into a district. Congregations receive periodic visits from traveling elders. Guidance and instructions are provided by a multinational governing body made up of longtime Witnesses who currently serve at the international offices of Jehovah’s Witnesses in Brooklyn, New York.— Acts 15:23-29 ; 1 Timothy 3:1-7 .
This international brotherhood of people of all races is made up of about 7.3 million practicing members organized into more than 105,000 congregations in more than 230 lands.
Do you shun former members?
Those who become inactive in the congregation, perhaps even drifting away from association with fellow believers, are not shunned. In fact, special effort is made to reach out to them and rekindle their spiritual interest. If, however, someone unrepentantly practices serious sins, such as drunkenness, stealing or adultery, he will be disfellowshipped and such an individual is avoided by former fellow worshippers. Every effort is made to help wrongdoers. But if they are unrepentant, the congregation needs to be protected from their influence. The Bible clearly states: “Remove the wicked man from among yourselves.” ( 1 Corinthians 5:13 ) Those who formally say they do not want to be part of the organization anymore are also avoided. What of a man who is disfellowshipped but whose wife and children are still Jehovah’s Witnesses? The spiritual ties he had with his family change, but blood ties remain. The marriage relationship and normal family affections and dealings can continue. As for disfellowshipped relatives not living in the same household, we apply the Bible’s counsel: “Quit mixing” with them. ( 1 Corinthians 5:11 ) Disfellowshipped individuals may continue to attend religious services and, if they wish, they may receive spiritual counsel from the elders with a view to their being restored. They are always welcome to return to the faith if they reject the improper course of conduct for which they were disfellowshipped.
It would seem that the claims that elders are not volunteers for the org, and that shunning is a personal decision are both contradicted by the information on the jw-media website.