In 1967 Stefan Buzas retired from the practice.
In 1968, Alan Craig and John Baker were made partners of the firm and Zbyszek Plocki joined JC&P as a resident architect and local partner in Nigeria.

Within this decade, Keith Banks, Bill Grant, Roy Milner, Dennis Marshall, Peter Gray and Ward Koss all joined James Cubitt & Fello Atkinson in the London office as Associate Partners.

A long association existed with the Swiss pharmaceutical company, Roche Products Ltd, and most of their work in the UK since 1964 was designed by JC&P.

The engine factory for Chrysler-Cummins (now Cummins Ltd) at Darlington, carried out in association with Eero Saarinen and Partners, won a Civic Trust Award and a Financial Times Award in 1966.

Other work in the 1960s included the Faculty of Medicine and Teaching Hospital at the University of Malaysia, Kuala Lumpur.

During this period, 2 higher education projects were commissioned: The Central Collegiate Building for University College London and a joint scheme for King's College & St Catharine's College in Cambridge.