Karthick Kalyanasundaram is a Senior AI Research Engineer at Cisco AI Defense, where he drives research in adversarial AI and LLM security for enterprise AI systems. He specializes in red-teaming large language models, prompt injection detection, and production guardrail development, advancing Cisco's capabilities in identifying and mitigating adversarial threats to AI at scale. His work bridges offensive security research and applied defensive modeling, enabling robust, production-grade AI safety infrastructure for enterprise deployments. Prior to Cisco, Karthick was an Applied ML Scientist at Microsoft and Staples, where he designed and deployed large-scale deep learning systems for recommendation, retrieval, and multimodal understanding , building production systems that served hundreds of billions of queries across global platforms.