At the end of the decade he was appointed at a relatively young age, consultant psychiatrist and depute physician superintendent at Stratheden Hospital, Cupar in Fife.
He believed in involving children's domestic and educational settings and persuaded colleagues from other disciplines to explore new avenues of treatment.
One of his notable recruits was the artist, Joyce Laing, who was instrumental in the rehabilitation of a convicted 'lifer' at Barlinnie prison, Jimmy Boyle.
Haldane managed to persuade Fife Health Board to build two family residential units in the grounds of Stratheden which he achieved by 1975.
In 1976 Haldane took up an academic appointment as senior lecturer at the University of Aberdeen, which afforded more time for writing and committee work.
These included: the Scottish Education Department's working party on 'maladjusted children', and the Secretary State's advisory Council on Childcare.
[9] His grasp of group dynamics and the application of different professional modalities in the public sector, saw Haldane seek out like-minded social entrepreneurs.
In that context he is regarded as having been instrumental in persuading J. D. Sutherland to return to his native Scotland, on retiring as medical director of London's Tavistock Clinic in 1968.
Together, with several other leading figures, they succeeded in laying the foundations of the Scottish Institute of Human Relations, which was intended as an early form of Think tank and provider of awareness and training for professionals involved in the public and corporate sectors.