Really? Pressured to leave work. Seriously? I can give you countless of JW articles that encourages finding a job and keeping it and it's benefits (e.g. Awake July 8 2005 pp. 1-11). I admit, even some elders in some congregation may impose their personal opinions on you, but that is what it is - their personal opinion. That have nothing to do with being a Witness. Like Derek mentioned, there's no compulsion in serving God.
Who are they? Elders? Administrative center? or JWs as a whole? Well, I see JWs getting married all the time; From the governing body to the last of a publisher.
Required? by who? As much as I can hardly see this to be true, I'd give you the benefit of the doubt. There is no such instruction to disfellowship any brother on such basis. The worst is the brother not being able to handle certain responsibilities in the congregation.
Please, next time, get your facts right. For all you know, that wasn't the basis for his disfellowshipment