1. Head, Division of Liver Transplant & Hepato Pancreato Biliary Surgery, Institute of Gastrosciences, Apollo Hospital, Kolkata — Since September 2020 as Lead Liver Transplant & HPB Surgeon
2. Jt Director, Liver Transplant & Senior Consultant, Gastro Intestinal Surgery, Artemis Hospital, Gurgaon — 2014 - 2020 : As lead liver transplant & GI Surgeon performed liver transplant on patients from over 18 different countries including on those from India, Pakistan, Bangladesh, Iraq, Uzbekistan, Khyrghystan, Afghanistan, UAE, Sudan, Kenya, Mauritius, Madagascar, Congo, Uganda, Rwanda,Turkmenistan, Myanmar, Ethiopia etc, besides other operations for cancers & diseases of the liver, pancreas, gall bladder , bile ducts & the Gastrointestinal tract.
3. Senior Consultant, Liver Transplant & Hepato Pancreato Biliary Surgery, Indraprastha Apollo Hospital, New Delhi — 2010 - 2013 : Was an integral part of a busy transplant program which performed the largest number of Living Donor Liver Transplants in the world in 2013. While working there, the department was regarded as one of the busiest transplant programs in the world led by a pioneer of liver transplant surgery, Dr Subash Gupta. During this period performed liver transplants at Delhi, Kolkata, Ahmedabad, Mumbai, Coimbatore & Dhaka
4. Assistant Professor of Surgery; Medical College, Kolkata — 2005 - 2010.

Certifications-

MRCS ( Membership of the Royal College of Surgeons of England )

Fellowship in Liver Transplant & Hepato Pancreato Biliary Surgery from Indraprastha Apollo Hospital, Delhi

Honorary Training in Upper GI & Laparoscopic Surgery from Wrexham Maelor Hospital, Wales, United Kingdom

Senior Residency in Surgery , University College of Medical Sciences ( UCMS ) , Delhi , 2003 - 2004

Professional Memberships-

1. Royal College of Surgeons of England
2. Liver Transplant Society of India ( LTSI ) : Founder Member
3. Indian Society of Organ Transplant ( ISOT )
4. International Hepato Pancreato Biliary Association ( IHPBA- India ) : Executive committee member 2022
5. Indian Association of Surgical Gastroenterology ( IASG )
6. Clinical Robotic Surgery Association ( CRSA )
7. Association of Surgeons of India ( ASI ) : Executive Committee member of West Bengal chapter 2022-24

1. Executive Committee member of International Hepato Pancreato Biliary Association ( IHPBA India )
2. Executive Committee member Association of Surgeons of India ( ASI West Bengal chapter )
3. Awarded Membership of the Royal College of Surgeons of England in 2007
4. Honoured & blessed by the Revered Dalai Lama for being part of the Liver Transplant Success Story at Indraprastha Apollo Hospital , New Delhi on 30 November, 2013
5. Felicitated by the Chief Minister of Chattisgarh, Dr Raman Singh at Raipur for contributions to Liver Transplantation in 2018
6. Medical Excellence award by the Delhi Medical Association ( DMA ) in 2013
7. Best Liver Transplant Surgeon in 2018 awarded by Healthcare Today 
8. Best National Research Paper Award at the Annual Conference of Association of Surgeons of India ( ASI  ) for presentation titled Outcome of Whipple’s pancreaticoduodenal resection for periampullary cancers. December 2002
9. Award paper presentation at annual conference of IASG in October 2011 at Jaipur titled Outcome of donor hepatectomy in Living Donor Liver Transplants
10. Awarded the 1st certificate of merit at the outgoing examination in Surgery of the Institute ( IPGMER ) for the session 2000- 2003.

Scientific publications

• Liver harvest from a live donor : Left lobe and its variants ( chapter ). Ray Ramdip, Goyal N, Gupta S. Annals of G I Surgery 2012 published by Indian Association of Surgcal Gastroenterology ( IASG )
• History of Liver transplantation ( chapter ) . Ray Ramdip. Textbook of Liver Transplantation. Paras Medical Publishers. 2022. First edition.
• Emergency Liver Transplant in patient with Child Pugh Class C cirrhosis and strangulated Umbilical hernia. Chaudhary A, Daga S, Goyal N, Vasudevan K R, Agarwal S, Pareek S, Ray Ramdip, Wadhawan M, Gupta S. Exp Clin Transplant 2012 Nov 21; 23190414
• Training of GI Surgeons in Liver Transplantation . Goyal N; Vasudevan, K R , Ray Ramdip;. Indian Journal of Transplantation . October 2011
• Developing a transplant program : The beginning of Liver Transplant activity in eastern India. Chowdhury A, Gupta S, Ghatak S, Goyal N, Ray S, Ray Ramdip, Das K, Kirtania, Ghose T. Indian J Transpl 2011. 5 (2 ) : 114 – 115.
• Gall bladder adenomyomatosis with tubercular portal lymphadenopathy masquerading as gallbladder carcinoma. Ray Ramdip, Dey R, Chatterjee S, Guha P. Arab J Gastroenterol 2012; 13 ( 3 ) : 150 – 2.
• Institutional Guidelines for Safe Surgery in HIV Patients in a Government Medical College  Ray Ramdip, Chatterjee S. J Indian Med Assoc 2021; 119(11): 38-41.
• A comparative study between early enteral feeding ( within 24 hrs ) versus conventional enteral feeding after enteric anastomosis. Chatterjee S, Bala S K, Chakraborty P, Dey R, Sinha S, Ray Ramdip, Rahed A. Ban J Med Sc 2012;11(4)
• Malignant Gastrointestinal Stromal Tumor of the third part of the duodenum presenting as Gastric Outlet Obstruction: A rare presentation - Adhikari S, Ray U, Ray Ramdip, Biswas N. The Internet Journal of Surgery 2008 Volume 16 Number 1 
• Spontaneous rupture of incisional hernia associated with pregnancy. De, Utpal; Ray, Ramdip. Surgical Practice, Volume 12, Number 3, August 2008 , pp. 97-98(2)
• Medical College, Bengal – A pioneer over the eras. Chatterjee S, Ray Ramdip, Chakraborty D K. Indian Journal of Surgery. Aug 2012

• Low portal flow dynamics in Living Donor Liver Transplant : 8th Pan Arab Liver Transplant Congress ( PALTS ) , Amman , Jordan , May 2022
• Marginal liver donor : 16th International Congress of the Asian Society of Transplantation ( CAST ) , Sept 2019
• Liver transplant : How I do it ( Surgical videos ) SASICME , State conference of Association of Surgeons of India ( ASI ) , Kolkata August 2019
• Organ donation & liver transplant symposium : Aesculapia, Medical College, Kolkata , August 2019
• Low Portal Flow Dynamics in Living Donor Liver Transplant  : July 2019 , R&R Hospital, Delhi
• Liver diseases & transplantation : Haridwar, BHEL June 2018
• Organ donation & liver transplantation : Raipur, November 2016
• Pediatric Liver Transplantation. PSG Medical College CME . Coimbatore November 2013
• Surgical Anatomy of Liver . IASGCON 2013. October 2013, Kolkata
• Liver Transplantation : Where we stand today. Delhi IMA conference Jan 2013.
• Reoperative Hepatobiliary Surgery. ASICON 2012. Kolkata
• Overview of Liver Transplantation . SASICME, West Bengal October 2011
• Management of Carcinoma Gall Bladder : Modular Course of the ASI, West Bengal held in June 2010
• Management of Rectal Cancer : Oncosurge 2009 at IPGMER & SSKM Hospital
• Surgery for Extrahepatic Portal Venous Obstruction : SASICME 2009
• Understanding Periampullary Cancers : Modular Course of the ASI, West Bengal held in November 2008
• Oncology & HIV/ AIDS : Role of the Surgeon : November 2007, Science City , Kolkata International Symposium on cancer organised by Chittaranjan National Cancer Institute
• Management guidelines for Colorectal cancers : February 2007, Rotary Sadan, Kolkata State conference of the West Bengal chapter of the Association of Surgeons of India
• Antibiotics in Contemporary Surgical practice : January 2007, Medical College, Kolkata Dr Kumar Kanti Ghosh Memorial Symposium at the Annual Re-union of the Medical College Ex-students’ Association
• Overview of Liver Transplantation presented at different conferences , seminars, CMEs in Delhi, Gurgaon, Kolkata, Faridabad, Rajasthan, Tashkent ( Uzbekistan ), Kenya ( Mombasa, Nairobi )  , Mauritius, Bangladeshetc