Simple past tense and past participle of liaise.(verb)
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Use "liaised" in a sentence
"I am so angry this morning; the USA have elected as President a man who has consorted with a terrorist, liaised with a fraudster, lied in interviews and worshipped in a black supremacist church."
"Every morning we would be met outside the favela by the 'associate' -- the man who liaised with the drug traffickers on our behalf and granted us access."
"Except perhaps to thank the officer for his diligence, not forgetting the detective he liaised with and crime desk advisers – for all were dragged into Griffin's wild goose chase, when they might otherwise have engaged in other more profitable activity."