Our Dietitians

Nutrition for weight loss surgery is very different to normal healthy eating and weight loss. Our specialist dietitians Eva Tamrakar and Shannon Overs are experts in the nutrition management of weight loss surgery, particularly gastric banding, sleeve gastrectomy, Roux-en-Y gastric bypass, and omega-loop gastric bypass. Bringing over 12 years nutrition counselling experience to SIOS, Eva and Shannon are highly committed to ongoing professional development and education to provide their clients with individualised, up-to-date, evidence-based dietary care.

Eva TamrakarAccredited Practising Dietitian (APD), Accredited Nutritionist (AN)Bachelor of Health Science (Nutrition & Dietetics) Honours

Eva Tamrakar Eva Tamrakar

University of Newcastle

Eva is a fully registered accredited practising dietitian and member of the Dietitians Association of Australia (DAA). Eva has several years’ experience providing nutrition counselling for adults in various health care settings including: clinical, community, corporate and private practice. As a testament to Eva’s diversity she holds the following appointments:

  • Sydney Institute for Obesity Surgery, Ashfield, (clinical dietitian)
  • Sydney Institute for Obesity Surgery, Guildford, (clinical dietitian)
  • The Sydney Private Hospital (clinical dietitian)
  • Private practice (Blacktown, Seven Hills, Parramatta)

Eva is a dedicated health professional eager to deliver an exceptional dietetic service advising you on the specific nutritional management of conditions and issues like obesity, diabetes and hyperlipidaemia.

Eva can provide a complete personalised eating plan to specifically suit your current lifestyle and your dietary needs in addition to your very own lifestyle assessment, nutritional education and goal setting.

At SIOS, Eva has been working for over 7 years helping patients achieve weight loss by diet and lifestyle modification, as wells as through bariatric surgeries like gastric band, sleeve gastrectomy, omega-loop gastric bypass, Roux-en-Y gastric bypass and gastric balloon.

Eva is keen to build a long term partnership with YOU to help achieve your health goals.

Shannon Overs Shannon Overs

Shannon Overs APD AN

Accredited Practising Dietitian, Accredited Nutritionist

Bachelor of Science (Nutrition)

University of Wollongong

Master of Science (Nutrition and Dietetics)

University of Wollongong

Shannon is a fully registered accredited practising dietitian and member of the Dietitians Association of Australia (DAA). She has both clinical and research experience and holds two appointments:

  • Sydney Institute for Obesity Surgery, Ashfield (clinical dietitian)
  • University of Sydney (research dietitian)

In her clinical role at SIOS Shannon specialises in nutritional management before and after weight loss surgery. She has extensive experience supporting clients though their life-changing journey; guiding them through every step of their gastric banding, sleeve gastrectomy, or Roux-en-Y gastric bypass. In her research position at University of Sydney, Shannon develops, co-ordinates and delivers group-based dietary interventions for weight loss, and weight loss maintenance on an international diabetes prevention trial.

Prior to her nutrition degrees, Shannon studied Commercial Cookery at Ryde College of TAFE. She completed her apprenticeship in 2003 becoming a qualified chef, and she has over six years’ cooking experience in the hospitality industry.

Shannon believes that the need for support does not stop after weight loss surgery. She strives to provide quality ongoing care to help her clients make the most of their procedure, and to improve their overall quality of life. With her unique combination of academic and culinary skills Shannon’s goal is to help her patients make eating healthy foods as easy as possible.

Natasha Leader APD/AN –CDE

Accredited Practising Dietitian (APD), Credentialed Diabetes Educator (CDE)

Masters of Nutrition and Dietetics Diabetes Education and Management

University of Flinders

Natasha Leader Natasha Leader

Natasha is an Accredited Practicing Dietitian as well as a Credentialed Diabetes Educator. Natasha attained a Masters of Nutrition and Dietetics at Flinders University in 2001 and after several years working in the area of diabetes undertook her Graduate Certificate in Diabetes Education and Management in 2008.

With 14 years of working between tertiary care hospitals and in private practice, Natasha specialises in the management of diabetes, pregnancy and obesity surgery. In addition to these specialist areas she is experienced in gastroenterology, heart health, nutrition support and oncology. Natasha ensures a thorough, compassionate and practical approach to helping Patients achieve their goals.

In addition to seeing patients she has been involved in various research projects and provides education sessions for general practitioners and other health professionals.

Natasha brings a wealth of experience and knowledge to our Patients and we are delighted to have her at our Northern beaches clinic at Delmar Private Hospital in Dee Why

  • International Federation for the Surgery of Obesity and Metabolic Disorders
  • The American Society for Gastrointestinal Endoscopy
  • American Society for Metabolic and Bariatric Surgery
  • Obesity surgery society of australia and newzealand
  • Society for surgery of the alimentary