Hi, I am Lambert.

I am a Senior AI/ML Scientist and Engineer working in Health AI. My work sits at the intersection of machine learning research, software engineering, and healthcare delivery, with a focus on building AI systems that are useful, measurable, and safe enough to matter in real-world settings.

At Optum AI, I lead and contribute to healthcare foundation models, clinician-facing generative AI systems, evaluation methods, and responsible AI review tooling. Recent work includes autoregressive sequence modeling for longitudinal care prediction, agentic evaluation pipelines for clinical AI solutions, and production systems that support healthcare experiences at large scale. I especially enjoy translating technical ideas across clinical, product, business, and engineering teams to get the right people aligned around impactful solutions.

Before that, I was a Postdoctoral Researcher with the OncoRad Research Core at the University of Washington School of Medicine, where I built clinically useful imaging and data tools for predictive biomarker research. My academic work has centered on medical imaging, quantitative biomarkers, multimodal learning, and longitudinal modeling for cancer and metabolic health applications.

I earned my PhD in Bioengineering from the University of Hawaii, where my dissertation, “Reducing the Burden of Cancer with Artificial Intelligence,” focused on developing novel AI methods for breast cancer and body composition analysis. I also hold an MS in Computer Science and a BS in Biology, a combination that has shaped how I approach technical problems in medicine: with equal parts rigor, curiosity, and respect for the underlying biology.

Across industry and academia, I have worked on foundation models, generative AI, natural language processing, self-supervised learning, computer vision, and medical imaging. I care a lot about evaluation, interpretability, and building systems that clinicians and domain experts can actually trust. My work has contributed to patents, peer-reviewed publications, and awards including the 2025 Optum Tech Make IT Happen award and the 2023 Outstanding Dissertation Award.

I am also committed to mentorship and giving back to the scientific community through programs with Google and the National Institutes of Health. Originally from Hawaii, I have a deep love for the outdoors. In my free time, you will usually find me hiking, exploring new trails, and taking photographs of the landscapes around me.