veteran
US /ˈve.t̬ɚ.ən/
UK /ˈve.t̬ɚ.ən/

1.
a person who has had long experience in a particular field
:
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She is a veteran teacher with over 30 years of experience.
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He's a veteran of many political campaigns.
2.
a person who has served in the armed forces
:
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The parade honored the brave veterans of the war.
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Many veterans struggle with PTSD after returning home.
1.
having had long experience in a particular field
:
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He is a veteran journalist, known for his insightful reporting.
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The team is led by a veteran coach.