concise – 
 covering much in few words
diligent – 
 hard working
alienate – 
 to cause to become unfriendly
casual – 
 informal
dull – 
 boring
ambiguous – 
 having more than one possible meaning
notice of resignation – 
 information of resigning from your job position
sufficient – 
 enough
effective – 
 starting on
to possess skills – 
 have skills
team environment – 
 setting in a team
in order – 
 for the purpose
contribution – 
 something that you give (opinions, money, time, etc.)
enclose – 
 add to a letter (resume, receipt, etc.)