• Assistant Professor, Dept. of Surgical Oncology, RCC Trivandrum (2025–2026)
• Assistant Professor, Dept. of Surgical Oncology, Sree Gokulam Medical College, Trivandrum (2024–2025)
• Assistant Professor, Dept. of General Surgery, Govt. Medical College, Trivandrum and Alappuzha (2019–2024)
• Senior Resident, Believers Church Medical College, Tiruvalla, Pathanamthitta (2018–2019
• Provisional Lecturer, Dept. of General (2016–2017)

• Breast Oncology
• Head and Neck / Thyroid Oncology
• Gastrointestinal and Hepatopancreatic Biliary Oncology
• Gynecological Oncology
• Peritoneal Surface Malignancies
• Musculoskeletal Oncology
• Urological Oncology
• Thoracic Oncology
• Cutaneous Malignancy

• MBBS — Government Medical College, Trivandrum (2005)
• MS General Surgery — PGIMER Chandigarh (2013)
• DrNB Surgical Oncology — MVR Cancer Center, Calicut (2020)

• Member of the Royal College of Surgeons (England)
• Member of the Association of Surgeons of India
• Member of the Indian Association of Surgical Oncology
• Member of the Kerala Association of Surgical Oncology
• Travancore Cochin Medical Council

• Best Paper Presentation — IASO NATCON, Madurai (2022)
• Best E-Poster Award — IASO NATCON, Mumbai (2021)

National Scientific Presentations

• Robotic Esophagectomy — Faculty Video Presentation, KASOCON (2026)
• Laparoscopic Supralevator Posterior Pelvic Exenteration with Stapled Colorectal Anastomosis — Video Presentation, KASO Colorectal Cancer Update (2024)
• Enhanced Recovery After Surgery (ERAS) Following CRS & HIPEC — Oral Presentation, IASO MIDOCON, Shillong (2022)
• Liver Metastasectomy — Five-Year Experience from a Standalone Cancer Centre — Oral Presentation, IASO NATCON, Madurai (2022)
• Neuroblastoma — Six-Year Single-Centre Surgical Experience — Oral Presentation, Indian Cancer Congress, Mumbai (2023)

• ERAS Compliance and Postoperative Outcome in Patients Undergoing Cytoreductive Surgery (CRS) and Hyperthermic Intraperitoneal Chemotherapy (HIPEC) Indian Journal of Surgical Oncology, 2026 Vishnu K S, Vishnu Kumar Tumma, Syam Vikram, Deepak Damodaran, Deepa Chandramohan, and Dileep Damodaran DOI: 10.1007/s13193-026-02545-3

• Patient Preference for Non-operative Treatment Strategy in Locally Advanced Rectal Cancer: A Cross-sectional Survey Indian Journal of Surgical Oncology, 2025 Tumma V, Vishnu KS, Vikram S, Damodaran D, Shamsudeen S, Rahman F, Alapatt JJ, Krishnan GR, Damodaran D. DOI: 10.1007/s13193-025-02280-1

• Radio-pathological Correlation of 18F-FDG PET in Characterizing Gallbladder Wall Thickening Journal of Gastrointestinal Cancer, 2019 Gupta V, Vishnu KS, Yadav TD, Sakaray YR, Irrinki S, Mittal BR, Kalra N, Vaiphei K

• Member of the Royal College of Surgeons (England) — MRCS (2017)
• Certificate in Comprehensive Laparoscopic Surgery — CE MAST, Mumbai (2019)

• English
• Malayalam
• Tamil
• Hindi