A digital transformation and strategy leader with over 20 years of experience driving growth across high-growth and emerging markets in Africa and Asia. His work focuses on connecting strategy, customer experience, technology, and culture to deliver measurable business impact.

Most recently, Sumanta served as Chief Strategy Officer for Ogilvy Africa, where he led strategy across 39 countries in Sub-Saharan Africa. During this period, Ogilvy Africa was ranked #1 agency network in Sub-Saharan Africa by the WARC Effectiveness Awards for three consecutive years (2022–2025), named Loeries SSA Agency of the Year (2024), and Cannes Lions SSA Network of the Year (2023). The network also achieved several historic firsts for the region, including the first Cannes Lions Gold, first Yellow Pencil, and mulNple global wins across Cannes Lions, WARC, One Show, D&AD, LIA, Drum and SABRE Awards.

In 2025, Sumanta served on the Media Jury at the Cannes Lions International Festival of Creativity, and he continues to be a regular jury member at leading global effectiveness and innovation awards.

He is now the Co-Founder of ASK Martech, where he is incubating CX, AI, and agentic business streams designed for the next era of growth. Sumanta is also a guest faculty member at premier institutions, including the Indian Institutes of Management, and a frequent speaker at global forums such as AdTech and the Asian Marketing Effectiveness Festival.