Hello and welcome! I’m Phong Do — a first-year PhD student at the University of Warwick, UK, supervised by Dr. Gabriele Pergola. My research focuses on prompt stability, prompt robustness, and security risks in LLM-based systems, with particular emphasis on indirect prompt injection (IPI) in retrieval-augmented and agent-based settings

My journey into AI began at the NLP@UIT lab at University of Information Technology in Ho Chi Minh City, where I specialized in question answering and machine reading comprehension as an undergraduate researcher. This early work laid the foundation for my long-term interest in building systems that can read, understand, and reason over text. After graduation, I continued my involvement with the lab and expanded my experience at Zalo AI, where I spent over three years working on large language models and speech processing. At Zalo, I contributed to speech technologies for Kiki Assistant, a Vietnamese virtual voice assistant installed in over one million cars, helping bring conversational AI into everyday life.

Beyond traditional NLP, I am also pursuing research in GeoAI — the intersection of geography and artificial intelligence. My interest lies in how spatial knowledge and geographic context can be modeled to improve information retrieval and reasoning, particularly in combination with RAG and Knowledge Graphs. By integrating linguistic and spatial perspectives, I aim to develop AI systems that not only understand language but also situate that understanding within the broader context of knowledge, culture, and place.

Research Interests

My research lies at the intersection of large language models, retrieval, and AI safety, with a focus on robustness, security, and structured reasoning.

• Prompt Stability & Prompt Robustness
  Sensitivity analysis of prompts, instruction perturbations, evaluation of reliable instruction-following.

• Indirect Prompt Injection (IPI) Defense
  Security of LLM agents, untrusted content handling, retrieval-time and execution-time defenses.

• Retrieval-Augmented Generation (RAG) & Question Answering
  Document retrieval, evidence grounding, reasoning over retrieved context.

• GeoAI & Spatial Reasoning
  Geographic knowledge graphs, spatial QA, geospatial retrieval and reasoning.

I am happy to chat and discuss potential collaborations. Please feel free to reach out to me via Email (phong.do@warwick.ac.uk).

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