join up with sb/sth
phrasal verbwithjoinverbuk/dʒɔɪn/us
to get together with anothercompany,person, orgroupinorderto do something together orformonecompany,group, etc.:
Thedesigncompanyisplanningtojoinup with ashoemanufacturerandcreatea newrangeoffootwear.
AOLjoinedup with Time Warner in ahigh-profilemerger.