I switched career when I was around 30 as well. I have a science degree but took short executive courses (finance, law) and got an entry level job in a finance related field. Started from the bottom and never looked back. I eventually took an mba to move into the sector that I wanted. I suggest a good mba (reputable ones) to help switch careers and from there you can choose to pick up professional degree like cpa, cfa etc to complement your existing qualifications (if it is relevant of course). Using a professional degree, like acca, cpa etc in my view is slightly more difficult. If you assume your previous experience is not relevant, then you are basically competing with people who are early 20s with cpas/accas, who also have the same qualifications. As an employer, who would you hire? a 30 year old with acca,cpa or a fresh graduate?