Our Doctors in Sydney

Dr N.S. Grewal opened the Observatory Tower Medical Centre in Sydney CBD in March 2000. He works part-time at the clinic seeing his regular patients and spends his other time working in the Emergency Department of hospitals and at his other Executive Health Group clinics. He specialises in men’s health, occupational health, stress management and emergency medicine.

Dr Brian Lonergan works full-time at the clinic taking appointments from 7.30am weekdays. His special interests include men’s and women’s health, preventative medicine, sexual health and stress counseling.

Dr Phoebe Holdenson Kimura graduated from the University of NSW and undertook her junior doctor training at Hornsby and Westmead Hospital. Her general practice training was in Far North Queensland, and her areas of interest are women and children’s health, mental health, chronic disease and skin cancer medicine. She is currently completing her Masters of Public Health. She speaks Japanese and is available for Japanese Health Checks.

Our Nurses Work With Our Doctors in Sydney

Leri Marcelino is our practice Registered Nurse. She assists our Doctors with blood tests, travel vaccinations, childhood and adult immunisations, corporate health checks, women’s, men’s and children’s health and more.


Click here to work in our team of doctors, nurses and medical administration team.

Make an Appointment With One of Our Sydney CBD Doctors

Click here to book an appointment online with one of our Sydney doctors.