AJC Architects has announced the passing of one of its founding partners, Russell Callam Jack, who passed away peacefully on Friday, 15 August 2025, aged 100.
Jack, who helped establish the practice originally known as Allen Jack + Cottier Architects, was a pivotal figure in shaping Sydney’s architectural landscape over several decades.
A contemporary of John Allen at Sydney Technical College, Jack began his career working alongside Allen at Rudder, Littlemore & Rudder while still a student.
His passion for architecture was evident from a young age, and even during his service in the Royal Australian Air Force he dedicated himself to developing skills in building construction and freehand drawing.
Following graduation, Jack’s early promise was recognised with multiple prizes, including the distinguished Byera Hadley Travelling Scholarship.
He travelled to London in 1952 to join Tripe & Wakeham Architecture, contributing to projects as varied as a harem for the Sheik of Kuwait.
Travels across Europe further deepened his appreciation for townscapes and urban environments.
Upon returning to Sydney, his talent was quickly acknowledged, and in 1958 he received the RAIA Sir John Sulman Medal for his own Wahroonga home.
By then, Keith Cottier — who joined the practice in 1957 as a student — was also part of the partnership that would become Allen Jack + Cottier.
Alongside professional achievements, Jack made a lasting contribution to architectural education, teaching design at the University of New South Wales.
He retired from practice in 1976 to join the UNSW Architectural Faculty full time as Senior Lecturer in final-year design, completing a Master of Architecture in 1980. He continued as a visiting professor until 1990.
Even after retirement, his engagement with AJC remained strong.
The practice shared that he followed their progress closely and enjoyed updates from colleagues.
In his final note to the team, written after hearing that his milestone birthday had been celebrated in the studio, Jack wrote:
“Hi Michael, Thank you for the big cheers in the meeting room – I could hear them over here!!!! I can’t believe I’ve got to the first 100!! – Russell.”
AJC Architects described Jack’s influence as foundational to the firm’s growth and the broader architectural profession.
“Russell’s vision and expertise were foundational to the establishment and growth of AJC, and his influence can be seen throughout Sydney’s built environment,” the firm said in a statement.
“His legacy continues to inspire all of us at AJC.”
An evening event will be held later this year to celebrate Jack’s extraordinary career and contribution to architecture, bringing together colleagues, friends and members of the architectural community.
“Our heartfelt condolences go to Russell’s family, friends, and all who had the privilege to work with him,” AJC said.