Dr Munidasa Winslow is a leading and renowned psychiatrist with over 35 years of experience in general psychiatry and addiction medicine. Dr Winslow graduated from the National University of Singapore (NUS) with a Master of Medicine in Psychiatry, and began his career at the Institute of Mental Health (IMH) in 1988, where he played a pivotal role in establishing and developing Singapore’s modern addiction treatment system. As Chief of IMH’s Addiction Medicine Department, he worked closely with the Ministry of Health to establish the National Addictions Management Service (NAMS), the nation’s first comprehensive public programme for addiction care.
Recognised as one of Asia-Pacific’s foremost experts in addiction psychiatry and impulse control disorders, Dr Winslow has published extensively and is a sought-after speaker and thought leader at both the regional and international conferences. Dr Winslow is an accredited Master Addiction Counsellor and Clinical Supervisor, testifying his commitment to holistic, evidence-based care with rehabilitative approaches.
His contributions span across the public service, forensic psychiatry, medical education, and community advocacy. He has served as an expert to Singapore’s courts, helped establish WE CARE Community Services, and is an Adjunct Associate Professor at the NUS Yong Loo Lin School of Medicine. Dr Winslow is strong advocate of recovery-oriented practice and peer inclusive care. In 2014, Psaltcare was established to focus on sustaining mental health recovery within the community.
In 2011, Dr Winslow founded Promises Healthcare, where he currently serves as the CEO and Senior Consultant Psychiatrist. Promises Healthcare is the largest private psychiatry care institution, where he continues to lead and champion multidisciplinary mental health and addiction services locally and regionally. Come end-2026, The Winslow, a nation’s first purpose built private inpatient centre dedicated to the treatment of substance use and behavioural addictions will open its doors, setting a new benchmark for high quality and personalised private care in the region.
Dr. Sharad Haridas is a respected Consultant Psychiatrist with extensive experience in general psychiatry, substance misuse, and behavioral addictions. A Fellow of the Academy of Medicine, Singapore (Psychiatry), he represents a high standard of professional expertise and leadership in the field.
With a career spanning both London’s public and private sectors, Dr. Haridas is recognized for his thoughtful, empathetic approach to a broad spectrum of mental health challenges. Firmly committed to advancing the field, he has contributed to pioneering research at Imperial College London and served as a lecturer at UCL. His practice is grounded in a holistic philosophy that integrates neuroscience, emerging treatments, and lifestyle optimization – always guided by a balance of clinical excellence and genuine compassion.
Dr Sean David Vanniasingham is a consultant psychiatrist experienced in general psychiatry, addiction medicine, and neurostimulation treatment.
Dr David graduated from the National University of Singapore with a Bachelors in Medicine and Surgery and subsequently attained his post-graduate degree from the Royal College of Psychiatrists. After completing his psychiatry residency training, he practiced as a psychiatrist at the Institute of Mental Health (IMH) and the National Addictions Management Service (NAMS).
Dr David has a vast experience in treating patients from both inpatient and outpatient settings. He has treated a wide variety of conditions including depression, anxiety, OCD, ADHD, psychosis, addictions, stress-related conditions and insomnia. He is also trained in in the practice of neurostimulation treatment modalities such as electroconvulsive therapy (ECT) and transcranial magnetic stimulation (TMS). Dr David is a firm believer of practicing a bio-psycho-social model approach in the holistic and recovery-oriented care of his patients.
Dr David is passionate about the education of young doctors. He was awarded the National Healthcare Group teaching recognition award for medical educators. He has also presented at conferences and given public education talks. He is an examiner for the MRCPsych (UK) examinations held in Singapore. Dr David is a fellow at the Academy of Medicine Singapore and is currently serving as an executive committee member of the Singapore Psychiatric Association.
Dr Sandor Heng is a skilled and experienced dual diagnosis clinician. He has a Doctorate in Clinical Psychology and has worked in both private and public health sectors in Australia and Singapore. Though he describes himself as a behaviourist by heart and was schooled in Cognitive-Behavioural Therapy, he generally adopts an eclectic approach in treating addictions and mental health. By focusing on a strengths-based approach, he blends evidence-based practice with practice-based evidence to achieve clinical outcomes. He has a special interest in co-occurring disorders (addictive disorders and mental health disorders), and his philosophy of therapy is to be the best version of oneself, which he practices in his own life.
Prior to joining Promises, Dr Heng was the sole psychologist at the National Addictions Management Service (NAMS) in the Institute of Mental Health (IMH) for 7 years and was the team lead for the NAMS Inpatient Program. Dr Heng currently sits on the Board of the Singapore Anti-Narcotics Association (SANA) and is the Chair of the Rehab & Reintegration Subcommittee. He is also an Associate Faculty in the Singapore University of Social Sciences (SUSS), where he teaches the Addiction Module in the Masters of Counselling Program.
Tom Maniatis has over 20 years of experience in concurrent addiction and mental health treatment delivery, a Senior Addictions Psychotherapist at Promises Healthcare in Singapore, specializing in the targeted treatment of complex behavioral and substance dependencies. Recognized for his clinical expertise in navigating modern psychological challenges, he provides evidence-based interventions for gaming and internet addiction, substance abuse, deep-rooted trauma, and ADHD.
Recovery requires more than simply treating symptoms; it demands addressing the underlying distress. Tom brings a fiercely non-judgmental, person-centered approach to his practice, understanding that addiction and behavioral struggles are often intertwined with burnout, unresolved trauma, or strained family dynamics. By integrating proven therapeutic frameworks, including trauma-informed care and Cognitive Behavioral Therapy (CBT), he creates a psychologically safe environment where clients can confront core issues without shame.
Working extensively with struggling adolescents, high-stress professionals, and distressed family units, Tom focuses on practical, long-term outcomes. He helps clients dismantle destructive cycles, develop resilient emotional regulation strategies, and rebuild fractured relationships.
Consulting fluently in both English and Greek, Tom partners with his clients to provide the sustainable, real-world tools they need to reclaim agency over their mental health and move forward with clarity and purpose.
As an Addictions Therapist, Gowri is passionate about guiding her clients through life’s challenges and helping them transition to healthier and more fulfilling lives. Her approach is defined by warmth and empathy, providing a non-judgmental and safe space for clients to explore their thoughts, emotions, and experiences. Gowri finds deep gratification in creating a mutually beneficial therapeutic experience that fosters exploration, learning, and reflection for both therapist and client. She holds a Masters in Counselling from Monash University, Australia, and is registered with the Singapore Association for Counselling (SAC).
Andrew da Roza is a qualified addictions psychotherapist who specialises in sex addiction. Andrew practices motivational interviewing, solution-focused brief therapy, and cognitive behavioural therapy to help clients identify their values, goals and strengths to enact positive change in their lives.
Currently, Andrew is Chairman of We Care Community Services, and sits on the Board of the Singapore Anti-Narcotics Association.
Varian Monteiro is a counselling therapist with considerable experience assisting clients with addiction, trauma, and relational challenges. He also assists clients in handling some of life’s toughest decisions. With his client-centered, biopsychosocial approach, Varian continues to lend a compassionate space to his international clientele.
Gaurang Bhatia is an experienced counsellor based in Singapore. He provides psychology therapy to adults and adolescents with a wide range of mental health concerns. His specialist interest is in addressing trauma and addictions. Gaurang also works with couples/partners especially in context of betrayal trauma. He also works with LGBTQ clients. As a seasoned meditator, Gaurang incorporates mindfulness in his sessions.
Alexis is a qualified psychotherapist with a special interest in substance use disorder. She has a Masters in Counselling and a Masters in International Addiction Studies. Alexis has substantial experience in addictions, trauma and eating disorders and is passionate about supporting clients in the early stages of recovery to lead healthy, positive and substance-free lives. She is an active member of the Asia recovery community,
Alexis has worked as a COO and CEO in the financial and wellness space in Asia and as such frequently counsels and mentors those who work in these and other high-pressure environments.
