Saturn aspects in synastry are notoriously difficult to handle. Saturn represents depression, restriction, fear of rejection, distancing, as well as commitment. Saturn aspects are certainly binding, but come with many problems. Here are some descriptions of how hard aspects (i.e. the conjunction, square and opposition) from one person's Saturn to another's Sun, Moon, Mercury, Venus and Mars manifest in synastry.
Saturn Sextile Midheaven
This is a highly favorable combination for professional and business cooperation. The Saturn person will evoke the Midheaven person in a purposeful,practical and responsible attitude toward achieving better career status. The Midheaven person will provide a good base for the Saturn person to effect their power and status and career. You will acquire stability and security in your relationship allowing each other to further your ambitions.