How do you say welcome in Polish ?

Travel Info
I have new employees soon who are from poland, want to make them feel 'welcome'

Travel Tips

chin dob bra (hello) but as one word
chin queer is (thank you)
(not sure if its spelt right )

went to Poland and they are the two words i could say
Others

my answer is don't . everyone understands bye
Polish (Poland) [to one, familiar] Witaj
Polish (Poland) [to several people] Witajcie
Polish (Poland) [by one person] Witam
Polish (Poland) [by several people] Witamy
Polish (Poland) [by several people] Witamy serdecznie
tony Blair...come on in?
Use "witamy." It's pronounced veet-am-ee or vee-tam-ee (emphasis on the middle syllable either way), and it means "we welcome" as in "we welcome you."
I studied in Poland.
"Welcome" is "Witamy"