Which of your natal houses will the Saturn/Mars conjunction be in? Consider the meanings of that house combined with the meanings of the tenth house.
Mars and Saturn conjoin every two years. The dates when they conjoin shift gradually, so that the conjunction happens close to the same time of year that it did the last time, but moves away from that date over time. If you have that conjunction in your upcoming solar return (it must be in August or September, considering the time of year they've been conjoining lately), either you had it in your solar return before last, too, or you will have it again two years later, or both. It might be more exact or less, depending on when your birthday falls.
I have a mid August birthday, and I had a Mars/Saturn conjunction in my SR chart every other year from 2010 to 2016, with the conjunction being exact--and right smack on my natal MC, too--in 2012. In 2016, it was right on my SR AC, square my natal Venus and Mercury, and also square the solar eclipse that happened right on my natal Venus two and a half weeks after my solar return. My musings on that are here:
http://www.astrologyweekly.com/forum/showthread.php?t=95692
What happened for me is probably not going to be what happens for you, of course. Every person is different, every chart is different, and even people with very similar charts are in different situations, so it will play out differently for everyone. If you have this conjunction in your SR tenth house, I would expect some sort of tenth house theme in how it plays out: career, public reputation, authority figures or experts of some kind, something along those lines. Move it to the eleventh, and there might be some added note of longterm plans, friends, and/or group activity. Either way, the theme of the natal house involved would also be included.