Chairman/Managing Director


The glorious journey of Slim Pharma began with Mr.Sumith Premarathne, the founder of the company who initiated its commencement in 2011. From a humble beginning to its transcending growth, Slim Pharma has grown through the years to be catapulted to the top 20 pharmaceutical companies in Sri Lanka. Mr.Premarathne’s unstinted support and passion, coupled with his 20 years of experience, towards providing quality healthcare medication to the industry, has assisted Slim Pharma acquiring this prestigious laurel of achievement in a short span of time. As of today, he is a figure of prominence who is actively involved in enhancing the quality of the pharmaceutical industry and its interests.

It is of noteworthy mention that apart holding fort at Slim Pharma as ‘chairman’, his multi faceted personality has granted him the responsibility of holding one more key position as mentioned below.

  • Lifeline Pharmaceuticals (Pvt.) Ltd – Managing Director and holds a noteworthy 50% stake in the company.

Director- Sales and Marketing


Deputy Chairman


Having served as the Director of Sales and Marketing since August 2013, Mr. Mahesh represents over 15 years of procedural know-how in diversified business sectors, engendering a decade’s worth of indispensable experience in Marketing, Product Development and Supply Chain Management.

His previous appointment as the Senior Product Manager for Fentons Pvt Ltd, Mr. Mahesh performed a key role in developing world renowned brands such as NEC and CISCO.

A bachelor of Management and Science from the University of Sri Jayewardenepura, he is a member of the Chartered Institute of marketing (MCIM) UK.

Mr. Premaratne is a former student of the esteemed D.S.Senanayake College, Colombo 7.


Managing Director
A veteran in the Pharmaceutical industry, Mr. Gayan Edirisinghe has been in the business for over 15 years, two of which was with Slim Pharma. He began his career as a Medical Representative at Hemas Health Care (Pvt) Ltd, following which he joined EmerChemie NB (Ceylon) Ltd.

He was recruited as the Medical Promotions Officer at Ceylinco Pharmaceuticals and then moved on to his appointment at Ceyline Pharmaceuticals (Pvt) Ltd, where he remained as the sales Manger prior to joining SLIM.

Mr. Edirisinghe has acquired an internal Diploma in Marketing Management from the University of Sri Jayawardenapura.


Managing Director
Mr. Shamal Fernando has enjoyed a capacious career spanning 12 years of experience in General Management, Marketing and Sales Management in Pharmaceuticals, Life Insurance and FMCG.

He has been an invaluable part of the SLIM family, contributing a decade’s worth of experience. Prior to joining SLIM he was a Business Consultant in the Pharmaceutical Division at J L Morison’s PLC.

He has worked both in Sri Lanka and over-seas, engaged as a Business Manager at Bayer and Takeda HealthCare Pharmaceuticals LLC and Pharmaworld LLC in Dubai,UAE.

Mr. Fernando was the Product Manager at Roche Pharmaceuticals Colombo, Limited, a Senior Product Specialist at Nephrology, Oncology-Roche Pharmaceuticals and Marketing Executive at A. Baurs & Co. (Pvt) Ltd and the Schering Plough (MSD)

He is a Master of Business Administration, specializing in Marketing and a Bachelor of Science in Psychology & Philosophy, with a CMA certification from Australia.