Romans 16:6 Greet Mary, who bestowed much labour on us.
Romans 16:12 Salute Tryphena and Tryphosa, who labour in the Lord. Salute the beloved Persis, which laboured much in the Lord.
Romans 16:21 Timotheus my workfellow, and Lucius, and Jason, and Sosipater, my kinsmen, salute you.
As Paul ends his letter to the Romans he begins to greet several of the members. I notice as he mentions them he gives a characteristic about them. Notice that the word labor is used 3 times and work fellow another time. There is no mention of them being pastors, missionaries, or preachers of any kind. They did however work hard. They worked with Paul helping him in the ministry some how!
I think that it is interesting to know that there is a lot of work involved in the church and ministry. It is not just come, sit, and enjoy. They worked, they helped, they served.
We are not certain of all that they did but they were obviously contributing and very busy!