I switched my career when I was 34. I worked as an Electrical Engineer for 7 yrs back in Nepal. Came to USA for MS. Graduated in 2009 which was very bad time and started working in one company as an Engineer in OPT. After working 10 months company decided not to sponsor new H1B candidate, so had to leave that job. No one was ready to sponsor H1B, So decided to join consultancy and extend my OPT. Took the BA training but did not like it. Again took Java Programming and started working from end of 2010. Now I am working as a Team lead. I had zero Java Programming knowledge but had C-Programming knowledge. Which is almost nothing. So age doesn't matter to switch your career..

Good Luck!!