The phrase "long tenure" refers to a long period of time that someone has held a particular position or job. It means that the person has been working in that role for a significant length of time. Full definition
Our recruiters are led by a highly - trained national team, with long tenure in our business. (mongoliatalentnetwork.com)
The average balances of older workers with long tenure at one employer indicate that a mature 401 (k) plan program will produce substantial account balances. (ebri.org)
Similarly, longer the tenure of the policy, higher will be the premium, because the insurance company is covering the risk of the policyholder's death for a longer period. (policybazaar.com)