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Sumith Premaratne
Chairman
Mr. Sumith has played an admirable role in the illustrious tale of SLIM Pharmaceuticals with his visionary leadership serving as a catalyst for inspiration and guidance throughout the organization. He commenced the company's transformative voyage in 2011 with a spirit of aspiration and an ambitious mindset, laying the foundation for Slim Pharmaceuticals to evolve into a remarkable success story in the realm of pharmaceuticals in Sri Lanka.

Driven by an unwavering commitment to excellence, enriched by over three decades of experience in the Healthcare and Medication domain, Mr. Sumith strategically steered Slim Pharmaceuticals toward prominence within the island's pharmaceutical landscape. His steadfast dedication and boundless passion proved to be pivotal in propelling the company to the helm of the industry as one of the nation's Top 10 Pharmaceutical Firms.

As the Chairman of Slim Pharmaceuticals, Mr. Sumith Premaratne's vibrant leadership epitomizes resilience and determination. He leads with not just authority and grit but also empathy and compassion, forging genuinely strong relationships with his team, partners, and stakeholders to effortlessly reap unwavering support and loyalty.

With a keen eye for talent and a passion for nurturing growth, Mr. Sumith’s brilliant mentorship has guided his employees toward success, transforming their careers and lives. His role in illuminating the professional journeys of young talent has extended beyond the company with a passion to illuminate the future of the entire pharmaceutical community. In Mr. Sumith Premaratne, Slim Pharmaceuticals has experienced not just a Chairman and a compassionate leader, but also a visionary pioneer and a guiding light.
Mahesh Premaratne
Deputy Chairman
In a distinguished career culminating in his remarkable role as the Deputy Chairman of Slim Pharmaceuticals, Mr Mahesh Premaratne has showcased exemplary leadership and strategic vision. He has played a vital role in the firm's achieving great heights in growth and success.

Mr. Mahesh's career highlights include his pioneering role as the Senior Product Manager at Fentons (Pvt) Ltd, where he played an integral part in shaping renowned brands such as NEC and CISCO, contributing to the company's prominence within the market.

His tenure as Deputy Chairman at Slim Pharmaceuticals has been distinguished by his dynamic leadership style, harnessing over 15 years of precious experience across diverse business sectors. His strategic intuition, honed through years of exposure to sales, marketing, product development, and supply chain management, has been instrumental in the company's noteworthy evolution.

Mr. Mahesh's extraordinary skills and acumen notably demonstrated in his previous role as Director of Sales and Marketing elevated the firm's performance standards. With a keen focus on innovation and sustainable growth, he has effectively overcome challenges and seized opportunities in the highly dynamic market landscape.

Formal education has laid a secure foundation for Mr. Mahesh's expertise, with a Bachelor's in Management and Science from the University of Sri Jayewardenepura and an International Master's in Business Administration from Buckinghamshire New University, United Kingdom. He is a distinguished member of the Chartered Institute of Marketing (MCIM), UK, a confirmation of his commitment to excellence in his field.

Mr. Mahesh received fundamental education at D. S. Senanayake College, Colombo 7, and St. John's College, Nugegoda, contributing to his well-rounded personality, skillset, and promising professional trajectory.
Gayan Edirisinghe
Managing Director
Mr. Gayan, the Managing Director of Slim Pharmaceuticals is a highly experienced professional with a wealth of industry experience exceeding 20 years. Throughout an illustrious career, he has demonstrated extraordinary leadership skills and industry expertise, with a track record featuring many pivotal roles before joining Slim Pharmaceuticals.

His professional journey began as a promising Medical Representative at Hemas Pharmaceuticals (Pvt) Ltd, while subsequently serving as a Medical Promotional Coordinator at Ceylinco Pharmaceuticals and Sales Manager at Ceyline Pharmaceuticals (Pvt) Ltd. Mr. Gayan has an excellent academic history with a Master's in Business Administration with a specialization in Marketing from the University of Bedfordshire, UK. His academic achievements also include an Internal Diploma in Marketing Management from the renowned University of Sri Jayewardenepura. His strong academic background, combined with his wealth of practical experience, has proven to be the driving force behind his success in Sales and Marketing in the pharmaceutical industry.

Mr. Gayan Edirisinghe's exceptional sales and marketing knowledge and excellent strategic thinking have proven to be invaluable to Slim Pharmaceuticals, steering the firm toward growth and success in the highly competitive pharmaceutical market. His natural leadership qualities also continue to guide the organization toward greater heights, ensuring sustained industrial growth and prominence.
Shamal Fernando
Managing Director
Mr. Shamal has cultivated a promising career with extensive experience and expertise in management, marketing, and sales, spanning over 12 years and a multitude of industries, including Pharmaceutical, Insurance, and FMCG. He has proven to be an integral member of the Slim Family, greatly contributing to the company's achievements.

Before embarking on the exciting voyage with Slim Pharmaceuticals, Mr. Shamal's career includes both local and overseas roles, including serving as a Business Consultant at J. L. Morrison's PLC. Additionally, he was a Business Manager at Bayer, Takeda HealthCare Pharmaceuticals LLC, and Phramaworld LLC in Dubai, UAE. He has also held the position of Product Manager and Senior Product Specialist in Nephrology and Oncology at Roche Pharmaceuticals Colombo Limited, and Marketing Executive at A. Baur’s & Co (Pvt) Ltd and Schering-Plough (MSD).

Mr. Shamal Fernando also boasts of an impressive academic history, with a Master's in Business Administration with a specialization in Marketing and a Bachelor's in Psychology and Philosophy alongside a CMA Certification from Australia. His diverse background and comprehensive skillset make him an invaluable asset to Slim Pharmaceuticals, driving innovation and sustainable growth as a Managing Director.
Eranga Withanachchi
Director - Consultant
Mr. Eranga is a veteran banker with over 15 years of experience serving leading local and multinational banks. He has immensely contributed to the leadership of Slim Pharmaceuticals through his experience and expertise in banking and finance.

A stellar academic background has played a pivotal role in his success with a Bachelor's in Accounting and Business Management from Bangalore University and a First Class UK Chartered Management Accountancy qualification. Mr. Eranga has successfully held various roles, including as a Senior Finance and Management Consultant with Middle-Market and Blue-Chip Companies across many industries.

Mr. Eranga’s dynamic skills and know-how in accounting, business, and finance have infused groundbreaking insights into Slim Pharmaceuticals' leadership with a promising outlook for the future.
Riza Cassim
Director - Marketing
A highly self-motivated veteran marketer with over 29 years of experience in the pharmaceutical sector, Mr. Riza Cassim plays a key role in the Slim Pharmaceuticals think tank. His vast experience extends beyond a wide array of therapeutic segments, including cardiovascular, gastroenterology, and endocrinology, providing the firm with invaluable insights.

Upon starting his career at Sanofi (formerly Hoechst), Mr. Cassim subsequently joined Pfizer as a Brand Manager. Fuelled through commitment, excellence, and growth, his career trajectory advanced significantly with him taking on the role of Head of Operations for Mylan USA and Micro Labs India.

Later, as the Country Head for AstraZeneca, Mr. Cassim was recognized twice as a Hemas CEO Award Winner for Outstanding Performance, two Country of the Year Frontier Market Awards for Exceptional Performance in India and Vietnam, and the Best Branding in Frontier Market, awarded in Vietnam. His leadership also guided two super brands to the pinnacle of the IMS Rankings in Q1 2020 MAT, dominating cardiovascular and PPI segments. Mr. Cassim's decorated career and proven track record have made him a highly renowned and respected figure within the pharmaceutical sphere. His presence within the leadership ranks of Slim Pharmaceuticals continues to inspire and motivate the entire team.
Nelum Ambawela
Human Resources Manager
Ms. Nelum Ambewela brings invaluable HR expertise, harnessed over an illustrious career spanning over 14 years. Since assuming her position as the Human Resources Manager at Slim Pharmaceuticals in 2022, she has brilliantly managed and developed the company's HR functions, ensuring smooth operations. She has provided extraordinary leadership to the HR Team in strategic planning and the optimal utilization and development of human resources.

Ms. Ambewela has a strong academic record with an MLRHRM and BSc in Natural Science from the University of Colombo and a PQHRM Qualification from CIPM. She is also a Certified Lead Auditor for ISO 90001:2015, a Certified HR Auditor, and holds a Lean Six Sigma Green Belt. Ms. Ambewela is pursuing an LLB (Hons) Degree, showcasing her commitment to continuous learning and professional development.

Driven by results and compassion, Ms. Ambewela fosters a healthy culture of inclusivity, growth, and excellence at Slim Pharmaceuticals. She strives to nurture a conducive work environment where employees are empowered, inspired, and motivated to reach their full potential. Backed by her extensive experience and qualifications, Ms. Ambewela has ensured the seamless aligning of HR practices and company goals, making her an invaluable asset to the firm.