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 Guo Song is a Senior Consultant Psychiatrist with extensive experience in adult psychiatry and addiction medicine. He has practised in Beijing, China and Singapore for over four decades, and is familiar with working across different cultural and healthcare settings.
He provides assessment and treatment for adults experiencing a range of mental health conditions, including depression, anxiety, stress-related difficulties and sleep problems. He also works with individuals facing alcohol and drug dependence, as well as behavioural addictions such as gambling and gaming, including those with more complex or recurrent difficulties.
Dr Guo takes a holistic and collaborative approach to care, working with patients to understand their concerns and develop a treatment plan suited to their individual needs. He places importance on relapse prevention and long-term recovery. In medication management, he adopts a careful and evidence-based approach, including medication optimisation, individualised dose adjustment and gradual tapering where appropriate, with attention to possible withdrawal symptoms.
Dr. Guo provides consultations in both English and Mandarin. In his clinical practice, he integrates the patient’s cultural background and personal circumstances to develop practical, personalized treatment plans, which may include acupuncture as a complementary intervention.
Andy Leach is a qualified and highly experienced addiction psychotherapist. His initial training was in psychodynamic therapy, and the skills he now employs with his clients are person-centred. He works with an all addictions model and has a passion for helping clients identify and achieve goals for addiction-free lives. Therapeutic techniques that he employs are CBT, the Minnesota Model, DBT, Motivational Interviewing and Trauma-informed therapy.
Andy enjoys delivering group therapy as well as individual therapy. He delivers Psycho-education groups as well as Yalom style process groups. In his capacity as Director of Addiction Services for Visions by Promises, he has created & set up the Intensive Outpatient Program. Before joining Visions by Promises, he was Clinical Lead for the Cabin Group in Asia.
Sharmini’s distinctive background in both the performing arts and counselling has ignited a profound interest in psychodrama. She adeptly leads Personal Growth Groups, skillfully integrating elements of bodywork, role play, and creative arts. Additionally, she maintains a consistent schedule of psychodrama workshops. Notably, her dedication is underscored by her extensive training, comprising over 1000 hours of instruction and practice with the Hudson Valley Psychodrama Institute and AANZPA (Aotearoa Australian and New Zealand Psychodrama Association). Her expertise earned her the recognition of the American Board of Examiners, certifying her as a proficient practitioner of Psychodrama, Sociometry, and Group Psychotherapy. She is also an esteemed member of the American Society of Psychodrama and Group Psychotherapy (ASGPP).
Sharmini’s impactful contributions have left a positive imprint across diverse institutions, ranging from healthcare establishments to correctional centres. Employing a holistic approach, she prioritizes stress alleviation and the cultivation of self-awareness within her clientele. Her workshops and mentorship endeavours stand as testaments to her unwavering commitment to professional development, characterized by her distinctive amalgamation of methodologies. Through her innovative integration of AF-EMDR with Psychodrama, she amplifies her capacity for facilitating profound healing. All in all, Sharmini’s fervent dedication to transformation and healing resonates deeply within her impactful body of work.
CLICK HERE for more information about Psychodrama Singapore and Sharmini’s involvement with Psychodrama.
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.
