For some context here's a list of the last ten All Whites coaches (which conveniently takes us back to Adshead '82) and the other highlights from their coaching CVs. This is the market we're in people...
Mick Waitt 2002-2004 - Napier City Rovers, Capital Football DoF, Wellington Olympic
Ken Dugdale 1998-2002 - Football Kingz, Vollen UL (Norway)
Joe McGrath 1997-1998 - Rep of Ireland U17, Bohemians, Kilkenny City
Keith Pritchett 1996-1997 - Waitakere City, United Soccer 1 DoF
Bobby Clark 1994-1995 - Dartmouth College, Stanford University, Notre Dame
Ian Marshall 1990-1993 - Rangers (Chch), Christchurch United
John Adshead 1989 - Western Australia State Leagues, Manurewa, NZ Knights
Kevin Fallon 1985-1988 - Gisborne City, Waikato Utd, Mt Albert Grammar School
Allan Jones 1983-1984 - Bristol City, Blyth Spartans, Darlington, Bermuda
John Adshead 1979-1982 - see above
So basically, if we get in a coach with experience at a higher level than English League 1, US College Football or the A-League they will be the most qualified coach we have ever had.
Don't hold your breath for Hiddink.
There is the incredible story of the three All Whites coaches in the 1960's unknown to most (especially Brocic and Schwanner):
While modest coaching backgrounds is true for the last ten coaches -but actually "the most qualified coach" (es) we have ever had were:
- Ken Armstrong AW's coach 1957-64 (Chelsea: 362 apps; one England cap: against Scotland at Wembley in England's famous 7–2 win in the British Home Championship in April 1955):
https://en.wikipedia.org/wiki/Ken_Armstrong_(footballer_born_1924)
- Lou Brocic AW's coach 1962-64 and 1968-69 (former manager of Juventus, PSV Eindhoven, Barcelona, Red Star Belgrade, Albania, Egypt, Lebanon, Kuwait): https://en.wikipedia.org/wiki/Ljubi%C5%A1a_Bro%C4%87i%C4%87
- Juan Schwanner AW's coach 1967-68 (of Hungarian & Chilean parentage - played for top tier clubs in Hungary and Chile; plus mighty Flamengo in Brazil !!!; managed Grazer AK, Austria & Club Brugge, Belgium before taking the NZ job - Swiss clubs Lucerne & FC Zurich after): https://en.wikipedia.org/wiki/Juan_Schwanner