The Kirk Session is the ruling body within the congregation. It sets the times of services, has spiritual oversight of the members of the congregation and of all the organizations, and sanctions the baptism and confirmation of those seeking membership of the Church. The Kirk Session must abide by the decisions of the General Assembly and Presbytery.
Meetings of the Kirk Session must be duly intimated and must be chaired by the Interim Moderator who is referred to at meetings as the Moderator. Meetings of the Session often follow meetings of the Congregational Board.
The members of the Kirk Session are the elders in the congregation and its officials are the Moderator who chairs all meetings of the Kirk Session, the Session Clerk who is the secretary of the Kirk Session and the Roll Keeper who maintains an accurate record of the membership of the congregation.
The members of the Kirk Session are listed below with the dates of their ordination as elders.
| Moderator: | Rev Jean de Villiers, BATheol BTh HonPsych. |
| Session Clerk: | Janet MacDonald |
| Roll Keeper: | Brian Keenan |
| Presbytery Elder: | Gordon I Callaghan |
| William Alexander 27/02/72 | Margaret B Robinson 09/04/00 |
| Elizabeth M Paton 16/10/77 | Jean de Villiers 12/12/03 |
| Hugh Millar 02/02/86 | Margaret J Alexander 14/01/07 |
| Marion B Devine 03/05/87 | Marjory E Greig 14/01/07 |
| Sheila M Horne 03/05/87 | K Irene Kay 14/01/07 |
| Catherine H Morrison 13/01/91 | Janet C MacDonald 14/01/07 |
| Brian Keenan 06/08/95 | Caroline H Brodie 01/05/11 |
| May M Vint 03/08/97 | Jean L Hurst 01/05/11 |
| Alison G Bennet 09/04/00 | Gordon I Callaghan 26/10/14 |
| Mary Clark 09/04/00 |
Rutherglen Old Parish 