Ruwan Amaratunga – MD, FRCPC (Respirology), DipABLM, WSSD, ESRS Expert Somnologist

Sleep & Lifestyle Medicine Specialist

Dr. Amaratunga is a pulmonologist and somnologist based in Ottawa, Canada.  He is board-certified in Internal Medicine (2012) and Respirology (2013) through the Royal College of Physicians & Surgeons of Canada (RCPSC). 

After his Respirology training, he went on to complete a Sleep Medicine Fellowship at the University of Ottawa in 2014, and achieved further certifications through the European Sleep Research Society (ESRS) in 2014 and the World Sleep Society (WSS) in 2017.  Most recently, he became a diplomate of the American Board of Lifestyle Medicine (DipABLM) in 2025.

With nearly 20 years of clinical experience in a health-care system heavily (primarily) challenged by preventable illness, Dr. Amaratunga has progressively focused his practice on sleep medicine, circadian health, and lifestyle interventions.  The clear benefits of this approach were further reinforced during the COVID-19 pandemic, when insufficient sleep and poor metabolic health were identified as strong, independent predictors of both infection risk and adverse outcomes.

Alongside his clinical practice, Dr. Amaratunga also maintains an academic position of Assistant Professor at the University of Ottawa, where he is engaged in mentorship, teaching, and clinical research related to sleep, metabolic health, and lifestyle interventions.

Outside of his professional work, Dr. Amaratunga enjoys travel and adventure, competing in Sprint- and Olympic-format triathlons, listening to and performing music (guitar and vocals), appreciating literature and art, and spending time with family and friends.  He also maintains a special interest in the intersection of philosophy, psychology, neurophysiology, and consciousness – especially as it pertains to both the initiation and maintenance of health behaviour change.

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Lasangi Kulatunga

Reception / Office Admin

Lasangi Kulatunga is a dedicated, people-centered professional known for providing attentive support and building strong, trust-based relationships. She holds a bachelor’s degree in Business Management with a specialization in International Business and a certification in Office Administration.

She brings a broad background across the tourism and telecommunication sectors, where she developed versatile skills and valuable industry insights. These qualifications have supported her success in the administration field, where she takes pride in delivering strong organizational and administrative skills.

Beyond her professional responsibilities, she enjoys refining her culinary interests, engaging in canvas painting, spending time outdoors, and valuing meaningful moments with her family. She believes that kindness, professionalism, and genuine care can make a significant difference in people’s lives, and she strives to uphold these values in every interaction.

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Lee Stach, M.Sc. (Biology)

Office Manager

Lee Stach comes to SomnoCare with a diverse background.  Formally trained as a Biologist with a specialization in animal physiology, she holds designations of both a Registered Professional Biologist and an Environmental Professional in Canada.  For several years, she worked in the private sector as a Project Manager, overseeing projects related to development and the environment in Canada.

Most recently, Lee opened a medical billing business which has given her unique insight into the medical system in Canada.  As the Office Manager, Lee ensures the seamless operation of the office, handling accounting, payroll and human resources.  Outside of work, Lee enjoys quality time with her family, embroidery, reading and other fibre arts.  Lee is also passionate about children’s literacy and is active with not-for-profits and the local elementary school on projects which further this cause.

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