Manus graduated as an architect from Duncan of Jordanstone College of Art, Dundee in 1973 with a Diploma in Architecture with Distinction, awarded Dundee Institute of Architects student of the year 1973.
Manus was Development of Hillcrest Housing Association from 1989-2010. He oversaw the commissioning through to completion and handover of around 5000 houses for Hillcrest Housing Association several client organisations & housing co-operatives throughout Tayside and Edinburgh. Further to his retirement from Hillcrest HA in 2010 Manus continues to provide part time development consultancy services to a major Scottish developer.
Manus is chairman of Tayside Building Preservation Trust and a member of Dundee Art Society.