What's the proper order for multiple educational degrees/certificates? Assuming someone has a PhD, MD, CISSP, CPA, CFA, MS, etc. etc. What's the proper way to order them after their name and is the comma needed after the last name? (i.e. Jane Smith, PhD, MD, etc. or John Smith MD, PhD, etc.)
Questions over titling are almost always a matter of local convention and personal preference. You can read more than you wanted to know over at Wikipedia:

https://en.wikipedia.org/wiki/Post-nominal_letters

A few rules of thumb:


If you're naming someone in a friendly context then your biggest concern is usually etiquette rather than technical correctness. If someone insists on being called "Jane Doe, PhD, MD" rather than "Jane Doe, MD, PhD" then it would be incredibly rude to object to them. Most people would not care, but if in doubt you should ask.
If you're establishing the credibility of someone, such as in a piece of journalism, then you list only relevant degrees starting with the highest degree. Even if multiple degrees are relevant it's likely that one degree will be most relevant.
If you follow the cite note for US degrees in the Wikipedia link above, you'll eventually get to this page, in which a protocol expert says that this is the appropriate order, with ties within each category being broken alphabetically:

1) Religious orders
2) Theological degrees
3) Academic degrees
4) Honorary degrees, honors, decorations
5) Professional licenses, certifications &amp; affiliations

Don't list degrees that have been superseded by another degree. That is, don't say "John Doe, PhD, MS, BS" because the MS and BS degrees have been eclipsed by the PhD.