Sameera Horawalavithana
Senior Data Scientist
Seattle, Washington, United States
Summary
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Senior🎓
Top SchoolSameera Horawalavithana is a Senior Data Scientist at Pacific Northwest National Laboratory with 12 years of experience and a Ph.D. in Computer Science and Engineering from the University of South Florida. Her work spans foundation models (LLMs and vision-language), privacy and security, and human-centered AI, bridging research-grade methods and production data architectures. At PNNL she progressed from postdoc to data architect and now leads applied AI efforts that integrate large-scale social and multimodal datasets. Her DARPA SocialSim work demonstrated strong predictive and generative modeling of information diffusion across platforms, winning top honors in a 2020 challenge. Comfortable moving between deep learning, graph generative models and real-time data warehousing, she combines academic rigor with practical delivery in national-lab settings. Based in Seattle, she brings a rare mix of adversarial thinking about privacy/security and hands-on systems experience to operationalize advanced AI.
12 years of coding experience
7 years of employment as a software developer
A/L Maths, A/L Maths at Ananda College - Colombo 10Doctor of Philosophy (Ph.D.) Computer Science and Engineering, Doctor of Philosophy (Ph.D.) Computer Science and Engineering at University of South FloridaBachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at University of ColomboBachelor of Science (BS) Computer Science, Bachelor of Science (BS) Computer Science at Umeå University
English
Github Skills (76)
audio9
chatbot9
language-model9
foundation-models9
compression9
pytorch9
deepspeed9
nlp8
multimodal8
chatgpt8
python8
deep-learning8
gpu8
transformers8
inference8
Programming languages (7)
Github contributions (5)
SamTube405/Graph_Unmasking
Jun 2018 - Sep 2020
Codebase for the Understanding the Structural Forces that Make Social Graphs Vulnerable to De-anonymization
Contributions:2 PRs, 9 pushes, 2 branches in 2 years 4 months
vulnerableunderstandingforcesanonymizationgraphs
sameeravithana/_profile
Jul 2015 - Apr 2026
Contributions:5 PRs, 108 pushes, 2 branches in 10 years 10 months
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