Age discrimination

meteoric

becoming successful very quickly

galling

upsetting because a situation is not fair

with gusto

with a lot of eagerness and energy

hotshot

someone who is very successful in their career

the old guard

the senior members of an organization or group, who are usually against change

go-getter

someone who is eager to be successful in their career

prejudice

an unreasonable dislike of, or preference for, a group of people based on their skin color, religion, nationality, or other superficial element of their identity

bias

prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.

scrutinize

to examine someone or something extremely carefully and look at the details

make a splash

be successful and attract attention

new kid on the block

someone who is new in a place or organization and has many things to learn about it

have been around the block a few times

have a lot of experience in a particular field

indicator

a sign that something is happening or is true

edge out

to take someone’s position in a company or a competition
without them knowing that it is happening

pass over

to not offer a job or promotion to someone, even though
they may deserve it

fend off

to defend yourself against an attack of some kind

You can’t teach an old dog new tricks

not being able to get someone to change their ideas or ways
of working as they have had them/done it that way for some time