Our Team

Tamar Krebs

Founder & Co-CEO

Tamar has worked in the Aged Care industry for the past 15 years both internationally and here in Australia. She has held senior management and leadership roles operating Retirement Villages, Hostels, Nursing Homes and Dementia Units. She holds many relevant and necessary qualifications such as a Masters of Health Service Management, a Bachelor of Science and various certificates and diplomas which provide her with a solid skill and knowledge base in Gerontology. She is recognised as a Specialist in both Behaviour Management and Aged Care and offers consultancies to various aged care providers.

Jonathan Gavshon


Jonathan comes with a strong background in business and Finance. Dementia and the aged care sector are also very close to his heart, having had a grandfather pass away from the disease. He has studied and worked overseas and in Australia. Most recently he worked for The Optical Company, a network of 30 glasses stores focusing on business development. Prior to that he worked at Allegro Private Equity, working alongside the CEO on the national rollout of a network of 50 mother and baby stores. He co-founded a start-up called Twobirds Bridesmaid, a retailer and wholesaler of bridal wear. From 2000-2007, he lived in New York where he was Vice President of J.P. Morgan’s Equity Capital Markets division. He is also passionate about the broader community, having founded The Observership Program, a not-for-profit focused on the leadership and development of young professionals. He has an undergraduate degree in Commerce and Masters degree in Business Administration. Jonathan is married to Daniella and has three children, who you may see around the homes…. they love to socialise!

Support Team

Madonna Jackson

Director of People, Care & Learning

Madonna is a Registered Nurse and has worked in aged care for 10+ years both in Australia and overseas. She has extensive clinical experience, but most importantly, she loves to care!

Jennifer Gavshon

Social Worker

Jennifer is a warm and approachable face that offers support to everyone – our residents, families and team members. She helps families transition to GHA and is available any time.

Amy Tsao

Financial Controller

Amy runs our finance department. She plays an integral role ensuring operational efficiency across our homes and corporate operation.

Nichola Walker

Quality Manager

Nichola has a background in nursing from England.  She subsequently travelled to Australia via India where she worked as a volunteer for 12 months.  Soon after arriving in Australia she pursued a publishing career and later as a PR consultant.  She now specialises in aged care quality.

Karen Kolenc

Quality Manager – Food

Karen is a qualified Food Technologist with vast experience in food safety. She ensures that residents have freedom in food choices, enjoying delicious quality meals that meet all food safety regulations.

Tais Crivellenti

Home Support & Office Manager

Tais is our operational and corporate office backbone. She has strong background in administration, business and marketing, ensuring the homes and the office runs smoothly! She is recognised by her varied skills and can-do attitude enabling continuous improvement of our procedures.

Clinical Team

Wendy Lau

Registered Nurse

Johnny Fan

Registered Nurse

Jacinda Castelijn

Registered Nurse

Homemaker Supervisor Team

Liezl Aguila

New South Head Road

Maria Burbano

New South Head Road
Rose Bay

Cherry Mercado

Garrick Road
St Ives

Mayvellen Olayao

The Cloisters
St Ives

Mary Reodique

Carrington Road

Thelma Marcelino

Killeaton Street
St Ives

Mart Sanchez

Benaroon Avenue
St Ives

Catyline Maingi

Earl Street
Hunters Hill

John Vincent

Alameda Way

Find out if GHA is right for your parent or loved one