Our Team

Reliable experts

Health Data Nova Scotia (HDNS) is comprised of a strong team of professionals with the expertise in statistics and research methods to find the data you need to complete your next project.

Our team

Dr. Samuel Stewart, PhD
Director, HDNS

Dr. Stewart is a trained health informatician with a keen interest in health data, health research and communication technologies. He has considerable experience in the field with numerous publication in both technical/medical journals and conference publications. He has research collaboration experience across the entire medical research community.

Lindsay Stewart, MSc
Manager, HDNS

Lindsay oversees the general operation and management of HDNS. She has over 20 years of experience in health sciences research, knowledge translation and policy, largely in the areas of cancer epidemiology and cancer screening.

Sandra Pauls
Regulatory Compliance and Finance Administrator

Sandra is responsible for developing and monitoring the compliance program and ensuring that activities of the unit meet regulatory requirements.  Sandra also manages the financial portfolio for HDNS, provides office and client support for activities and business services and is a member of the Data Access Committee. Sandra brings over 20 years of experience to her role at Dalhousie University.

Katelyn Frizzell, MSc
Research Data Navigator

As the HDNS Research Data Navigator, Katelyn supports researchers in the data access process, data navigation for databases and database variables and coordinates among researchers, analysts, and data access committees.

Yoko Ishigami-Doyle, PhD
Research Analyst/Documentation Specialist

Yoko has over 10 years of experience in a wide range of academic research including cognition, aging, and aging-related disorders in the areas of psychology and epidemiology.

Lihui Liu, MSc
Senior Research Data Analyst

A senior research data analyst with the Maritime SPOR SUPPORT Unit, Lihui is embedded within HDNS, and is focused on health service and patient-related outcomes research.

Yan Wang, MCS
Senior Research Data Analyst

Yan is the Senior Analyst at HDNS, and has significant experience in data extraction and analysis. Her research areas include health services research, clinical epidemiology, and pharmacoepidemiology.

Vivien Obiakor, BPharm, MSc
Data Navigator/Analyst

Vivien is a Data Navigator/Analyst at HDNS. She is a Pharmacist with experience working in both hospital and community pharmacy sectors. She obtained her Bachelor of Pharmacy degree from the University of Lagos, Nigeria and her MSc degree in Clinical Epidemiology and Infectious Diseases from the School of Public Health at the University of Alberta, Canada. She is interested in health research, biostatistical analysis, pharmacoepidemiology and patient care.

Yves Ibeme, BAS, MTEI
Research Database Administrator

Yves is a database administrator at HDNS with a background in the Advisory and Consulting industry. He completed his Master of Technology Entrepreneurship and Innovation at Saint Mary’s University, where he also took Business Intelligence. He is also a certified Scrum Master and Robotics Process Automation Developer. Areas of interest include data science and machine learning.

As the HDNS Database Administrator, Yves oversees the HDNS Secure Data Platform, a Cloudera based big data environment integrated with analytical tools and products. 

Xuyuan Zhang, MPH, PhD
Research Data Analyst/Data Navigator

Xuyuan is a data analyst at HDNS. She obtained her doctoral degree in Pharmaceutics from China Pharmaceutical University and her master’s degree in Biostatistics from the School of Public Health at the University of Maryland, USA. She has experience in public health research and biostatistical analysis.


Jordan Farrell, MHI - Systems administration

Olanrewaju Orija - Data analysis

Akash Rupareliya, MACS - Website development; Data analysis

Sam Tung, MPH - Data analysis