Our Team

  • Dr Sebastian Rees


    General Manager

    Sebastian is an Australian trained General Practitioner with a passion for improving the health outcomes of older Australians. Sebastian co-founded GenWise in 2013 and continues to strive for improved health care delivery in residential aged care.

  • Dr Troye Wallett

    Clinical Manager

    Troye Wallett is a South Australian based GP who has a special interest in Aged Care medical education, learning and development. Troye has held positions on the RACGP SA/NT faculty board and works closely with regional GP RTOs. Troye is co-founder of GenWise.

  • Amina Horton

    Engagement Manager

    Since 2013 Amina has helped to cultivate a culture of support, empowerment and purpose throughout GenWise. As well as managing day to day operations, Amina oversees GenWise GP recruitment and HR.



  • John Pappalardo

    CEO - 24-7Healthcare

    John is an experienced executive who has worked across a number of major industries including healthcare, logistics and manufacturing. He has a track record in driving increased shareholder value through business growth and profit improvement programs.

    John has spent the last 12 years in healthcare, taking particular satisfaction from the higher social responsibility that is bestowed upon healthcare organisations. He is of a clear view that quality and patient-centricity is at the heart of our business purpose.

  • David Wiggins

    CFO - 24-7Healthcare

    David Wiggins is a Chartered Accountant and experienced Chief Financial Officer and Company Secretary, having held the financial leadership roles in a number of ASX listed and private equity owned companies over the past 20 years.

  • Dr Umberto Russo

    Chief Medical Officer - 24-7Healthcare

    Dr Russo has more than two decades’ experience both in General Practice and medical deputising. He established Adelaide’s leading medical deputising service prior to merging with 13SICK, National Home Doctor Service. Dr Russo works closely with the Board overseeing clinical governance, policies and procedures.