veteran
US
UK veteran n: (soldier who has been to war)
SC 老兵，老战士 lǎo bīng，lǎo zhàn shì
SC 退伍军人 tuì wǔ jūn rén
Veterans of several wars were honoured at the ceremony.
veteran n: ([sb] long serving, experienced)
SC 老员工，老臣子 lǎo yuán gōng，lǎo chén zi
SC 过来人，经验丰富者 guò lái rén，jīng yàn fēng fù zhě
Ask Bill there - he's the IT department's longest-serving veteran.
veteran adj: (long serving, experienced)
SC 老资格的，老资历的 lǎo zī gé de ，lǎo zī lì de
SC 经验丰富的，过来人的 jīng yàn fēng fù de ，guò lái rén de
Veteran waitresses will tell you that smokers tip better.
seasoned veteran n: (person with years of experience)
SC 经验丰富的老兵 jīng yàn fēng fù de lǎo bīng
You certainly have some experience, yes, but this job may need a seasoned veteran.