Hmm IT companies are very entrenched businesses. Once a company signs one they generally stay for life. I know this because I was considering a roll up of IT companies and did some digging
Something i would look for is for IT companies going out of businesses, or rapidly declining headcount / other leading indicators of a shut down. Thats usually the only window you鈥檒l get for switching IT firms, unless their current vendor completely shits the bed