Following an election that sent the Greens' Senate vote backwards, there has been a mass exodus of senior advisers, with some privately citing dissatisfaction over the direction of the party and its poor campaign strategy.

A 4.5 per cent Senate swing against the Greens and a 3 per cent negative swing in the lower house had the party shed more than 400,000 votes at the election and has sparked a round of internal recriminations and soul searching.

Senator Milne's highly regarded chief of staff, Ben Oquist, quit this week amid suggestions he had too many differences of opinion with Senator Milne.

''He left on good terms, but Christine wouldn't take his advice and he got tired of that,'' one Greens operative said.

Mr Oquist responded to questioning via text message, saying he resigned to pursue interests in the business and community sector.

Senior media adviser Georgie Klug is also gone, while others have also parted company.