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1. She started her new job with 10 years of experience.
2. She started her new job with 10 years of experience behind her.

Is sentence 2 better written than sentence 1? What does "behind her" add?
Comments  
Neither is 'better' than the other. The second adds a note of emphasis and informality.
So,

2. She started her new job with 10 years of experience behind her.

is non-standard English?
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Hi,
SheltieBitesnon-standard English
I can't find the words above in MM's post.

‘The second adds a note of emphasis and informality.’

Regards
informality = nonstandard-ness?
Hi,
No. ‘Informal’ = relaxed and friendly; casual.

Regards
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There is no ambiguity in writing:

"She started her new job with 10 years of experience."

instead of

"She started her new job with 10 years of experience behind her."

?