Assume you have many academic titles, but you have also many positions. 
I am thinking to exclude all positions, and just having your academic titles because I do not want to carry a pile of different business cards and in many languages – just one general for all. 
So I would leave out all positions, which can be seen on my online profile if necessary, e.g., ORCid, .... 

Format 

- Name
- Titles
- ...


Example:


> Leo  
> MD, PhD (Med.), PhD (Tech.)