The phrase "year veteran" refers to someone who has been doing a particular job or activity for a number of years. It shows that the person has a lot of experience and knowledge in that field.
A 20 + year veteran of the fitness industry, she's worked with the top certification and continuing education groups. (blog.nasm.org)
As a 20 + year veteran in the real estate lending industry, I've noticed a glaring difference in the number of female investors versus male investors. (corevestfinance.com)
Oh before you ask five year veteran who would be happy to be he one kicking. (religion.blogs.cnn.com)