Your question does not provide any further details as to what the exact purpose of these SSMs might be. Under such circumstances I believe you must understand what SSM is in its truest sense and then go for hiring process. You can check out these links: https://www.umsl.edu/~sauterv/analysis/F2015/Soft%20Systems%20Methodology.html.htm
https://www.diva-portal.org/smash/get/diva2:408752/fulltext01.pdf
But still If you choose hiring experienced professionals as an option you can use this link: https://welcometossm.com/work/employment-services/
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath

Hi there! For social media marketing professionals I would post a job on this site: "https://workmonger.com/ The founder, John Troy, has done a lot of networking to build both the client and freelancer based among education professionals. It's a site for non-teaching jobs in the field of education. I've been in that field for 10+ years and most people I know with active LinkedIn profiles are connected to him. You may also want to reach out to him on LinkedIn to discuss your project. He may have a team that can give you more high touch support to find the right person.

If you have any other questions about this project, or others, I'd be happy to do a call.

Best,
Leslie Pankowski

Yes, come inbox, will let you know