I have the necessary experience to go for the management concentration, but would like to pursue architecture in the future and potentially also the architecture concentration. I can not find any resources about holding multiple concentrations? So, can you hold two, or all?
As long as you meet the requirements and pass the tests then yes you certainly can..
Yes, my instructor for my ISSMP training class currently holds all 3, and the author of the 2nd edition official ISSMP exam guide has both ISSMP and ISSAP.
In the immortal words of Cartman from South Park:
Follow your dreams, you can reach your goals - I'm living proof! Beefcake, BEEFCAKE!!! 😛
Yes, as the others have said, you can hold all three concentrations like I do. You just need to pass the exams and provide proof you have the requisite experience the same as any other ISC2 certification.
Dang, now I have to take time out of my work day (oh woo is me) to study South Park to understand Beefcake, BEEFCAKE LOL
As previously stated by others, YES.
If you are on LinkedIn, there are a few members that have all three concentrations in their signature blocks and on their profiles.
Best of luck.