Amutheezan Sivagnanam
Postdoctoral Fellow, University of Houston

I work on vulnerability data quality, automated repair, and deception detection. I study how robust label error detection is to near-duplicate and tampered samples. I build automated repair methods for software vulnerabilities. I study deception detection that accounts for figures of speech. My Ph.D. applied deep reinforcement learning to combinatorial optimization in transportation.

My research: vulnerability dataset quality, label error detection robustness, automated vulnerability repair, and figure-of-speech-aware deception detection — built on a Ph.D. in deep RL for combinatorial optimization from Penn State's Applied AI Lab.

Portrait of Amutheezan Sivagnanam

Biography

01

Amutheezan Sivagnanam is a Postdoctoral Fellow at the University of Houston. He works on software vulnerability dataset quality, label error detection robustness, automated software vulnerability repair, and figure-of-speech-aware deception detection.

He earned his Ph.D. in Informatics from The Pennsylvania State University in Summer 2025, where he was a member of the Applied Artificial Intelligence Lab advised by Dr. Aron Laszka. His doctoral research focused on applying artificial intelligence to solve combinatorial optimization problems in transportation domains. He also earned a Master’s degree in Computer Science from the University of Houston in Summer 2022, and completed his Bachelor’s degree in Computer Science and Engineering at the University of Moratuwa, Sri Lanka, in 2017.

Before his doctoral studies, he gained industry experience as a Software Engineering Intern at WSO2 Lanka (Pvt) Ltd, working with the Data Analytics Team from July to December 2016. He later worked as a Software Engineer at LSEG Technology (formerly MillenniumIT Software (Pvt) Ltd), contributing to the Post-Trade Team from January 2018 to July 2019.

Research areas

02

Vulnerability Dataset Quality

Curating and evaluating the data quality of software vulnerability detection datasets.

Label Error Detection Robustness

How robust label error detection tools are to near-duplicate and tampered samples.

Software Vulnerability Repair

Automated repair of software vulnerabilities.

Figure-of-Speech-Aware Deception Detection

Detecting deceptive intent with methods that account for figures of speech.

Reinforcement Learning

Deep RL for sequential decision-making, including actor-critic agents with transformers for variable-dimensional, large discrete action spaces.

Combinatorial Optimization

Problem formulations and mathematical models for large-scale routing, scheduling, and resource-allocation problems, paired with learning-guided search.

Multi-Agent Systems

Hierarchical, coordinated multi-agent approaches, such as repositioning emergency responders across regions to reduce response times.

Cyber-Physical Systems

Real-time decision-making for physical infrastructure, including on-demand transit fleets, ambulance stationing, and dynamic vehicle routing.

Experience

03
2025 — Present

Postdoctoral Fellow

University of Houston, Department of Computer Science

2022 — 2025

Ph.D., Informatics

The Pennsylvania State University

Graduate Research Assistant, Applied Artificial Intelligence Lab, advised by Dr. Aron Laszka. Deep reinforcement learning for combinatorial optimization in transportation.

2019 — 2022

M.S., Computer Science

University of Houston

Graduate Research Assistant, Resilient Networks and Systems Lab, advised by Dr. Aron Laszka.

2018 — 2019

Software Engineer

LSEG Technology, Post-Trade Team

Developed and tested application software for post-trade systems using Java, Python, and C++.

2016

Software Engineering Intern

WSO2 Lanka (Pvt) Ltd, Data Analytics Team

Built an HL7 monitoring and disease-outbreak alerting solution on WSO2 ESB, DAS, and BAM.

Selected publications

04

Minimizing Energy Use of Mixed-Fleet Public Transit for Fixed-Route Service

AAAI-21 · 2021 First author · CORE A*
Combinatorial optimization