Our Research team operates out of our Chatswood office, while also collecting data at the Mater and RPA hospitals. Working across the organisation, our researchers regularly collaborate with other community service agencies, universities, research institutes and government agencies to complete research studies.

Research Team

Samuel Grasso

Samuel Grasso B. Engineering, PhD

Clinical Applications Engineer

Samuel has completed a Bachelor of Mechanical Engineering degree and a Doctor of Philosophy in Biomedical Engineering (2018) at the University of Sydney. His research incorporates computational and image based methodologies to measure and optimise ligament position in ACL reconstruction on a patient specific basis, to improve pre-surgical planning processes and post-operative assessment.

Samuel is responsible for Sydney Orthopaedic Research Institutes research and development activities involving computational modelling.

Yoong Lim

Yoong Lim PhD

Research Associate

Yoong is a research associate and conducts biomechanical research relating to knee conditions. Here, he conducts biomechanical experiments and computational analyses using SORI’s state-of-the-art 3D biomechanics laboratory. Yoong’s current research projects are return-to-sport assessments for anterior cruciate ligament (ACL) reconstruction patients and gait analyses for ACL and high tibial osteotomy (HTO) patients. His research interests are musculoskeletal modelling and ultrasound image processing.

Yoong has completed postdoctoral trainings and a PhD (Biomechanical Engineering, University of Melbourne) on computational and experimental biomechanics.

Elmira Hooshmand BBSC, MPH

Elmira Hooshmand BBSC, MPH

Senior clinical research associate/ Database manager

Elmira has completed her Master’s in Public Health and Community Medicine at the University of New South Wales. Elmira comes from a background in clinical infectious diseases and epidemiology, having completed her honours in CSRIO. At SORI, Elmira oversees all clinical data collection on patients and coordinates clinical research staff for relevant tasks. Her role focuses on managing the database to coordinate and implement strategies for progressive improvements in the data management system as well as collaborating with the research team, stakeholders, and directors to ensure the timely progress of research.


Arpita Das MPH BDS

Clinical Research Associate

Arpita joined the SORI team in February 2020, working part-time as a Clinical Research Associate. She is an overseas trained dentist with a master’s degree in public health from University of New South Wales. She has a strong interest in healthcare
research and primarily works at our research rooms in Chatswood. Her primary responsibilities at SORI include clinical data collection from patients attending the clinics, maintaining the patient database and assisting the SORI research team with ongoing projects

Nadia Mazari

Nadia Mazari, BSc

Clinical Research Associate

Nadia has worked as a Clinical Research Associate at SORI since March 2016. She is currently studying a Master of Nutrition and Dietetics at the University of Sydney while working at SORI part-time. Nadia can be seen working across our research rooms with our surgeons in Newtown, Crows Nest and Chatswood.


Over the years, Nadia has been involved with numerous roles at SORI including the maintenance of our database of over 10 000 patients, developing standard operating procedures, and managing patient clinical data. Currently, her primary responsibilities involve clinical data collection, data auditing and supporting the SORI research team with ongoing projects.

Akhmal Hakim

Hakim Ariffin, BEng

Clinical Research Associate - Engineer

Hakim has completed a Bachelor degree (Vanderbilt University, USA) and a Master degree (University of Sydney). Both degrees are on Biomedical Engineering. He is an experienced biomedical engineer who has previously worked for both Canon Medical and St. Jude-Abbott.

At SORI, Hakim is working alongside the clinical research team in maintaining high quality clinical data collection and management. In addition, Hakim is working on computational modelling and analysis of orthopaedic patients data, and also assists in supporting IT resource.

Finance and Administration

Lionel Jeyaraj

Lionel Jeyaraj FCCA, FIPA, FFA

Finance and Administration

Lionel is a member of the Chartered Association of Certified Accountants UK and Institute of Public Accountants in Australia. He brings over 30 years of extensive domestic and international business accounting and advisory services, including eight years in the accounting profession. He has accumulated a wealth of experience in business management, tax accounting and compliance, financial analyses, auditing, statutory and ASX reporting, technology and change management. Lionel is focused on business results and improvement though effective processes, systems, reporting and efficient asset management.

Lionel has industry experience in various capacities ranging from Accountant to CFO encompassing information technology, telecommunications, education, gaming, leisure, research, marketing, venture capital and not for profit organisation.

Current Fellows

Anna Kropelnicki

Dr Anna Kropelnicki

Clinical Fellow

Dr Anna Kropelnicki is a UK-trained trauma and orthopaedic surgeon. Having graduated originally in Neuroscience and completed a PhD at Cambridge University, she entered the graduate programme to read Medicine at Oxford University, graduating in 2006. She spent her Foundation training within Oxford and moved to Bristol for her Core Training in order to additionally maintain her elite sports career. She joined the specialist training programme in 2010 on the prestigious North West Thames rotation within the London Deanery. She became a Fellow of the Royal College of Surgeons the same year as completing training in 2018.

Prior to joining SORI, Anna was awarded a Fellowship with NHSGrampian and the University of Aberdeen in a combined clinical (Sports Knee) and teaching fellowship. Her research interests are the management of soft tissue knee injuries, quantifying outcomes in relation to return to sports after surgery, and surgical options for early osteoarthritis.


Dr Claire Bolton

Clinical Fellow

Dr Claire Bolton is an Australian-trained Orthopaedic Surgeon from Adelaide.  Claire did a Bachelor of Biomedical Science at the University of Adelaide before entering graduate medicine at The Flinders University. Claire transferred to The Australian National University in Canberra mid medical degree and received her MBBS there. She then worked in Canberra for 5 years as a junior doctor before returning to her hometown of Adelaide to commence Orthopaedic Surgery Training in 2015. Claire received her fellowship in Orthopaedic Surgery from the Royal Australian College of Surgeons and the Australian Orthopaedic Association in February 2020.

Claire’s research interests include results and outcomes of soft tissue knee injuries, in particular ACL reconstructions and repairs, as well as results of total knee arthroplasty.

Johanna Elliott

Dr Johanna Elliott

Clinical Fellow

Johanna Elliott is an Australian AOA trained Orthopaedic Surgeon who completed her qualifications in Duesseldorf Germany and has been practicing as an Orthopaedic Specialist with a focus on lower limb arthroplasty and trauma for over 12 years. She holds a position on the Ethics Committee for Medical Research at Essen University. She has returned to beautiful Sydney, the city where she was born, to learn the latest technological advances in precision knee surgery. Johanna is in the process of completing her PhD at the University of London and maintains a consultancy position at the EPRD in Berlin (German Arthroplasty Registry). Her general research interest are the public health implications and outcomes of lower limb arthroplasty, with a focus on scientific documentation of advancements in these medical products.