Sean Lillis is a Senior Software Engineer with 12 years of experience building and leading software teams across embedded systems, radios, and enterprise automation. He combines hands-on development—spanning C++, real-time/RTOS environments, and PowerShell tooling—with program-level planning and release ownership on multi-million dollar efforts. As founder and primary maintainer of the widely used PSAppDeployToolkit, he brings deep expertise in endpoint management, Intune, and automation that improves deployment reliability for large Windows fleets. At L3Harris he’s transitioned between individual contributor, manager, and feature lead roles, regularly decomposing complex requirements into deliverable roadmaps and mentoring engineers. He holds an MS in Product Development and a BS in Computer Engineering from RIT, and is comfortable operating at the intersection of product, operations, and developer tooling. A pragmatic problem-solver, he often surfaces subtle UX and error-handling improvements in infrastructure code that reduce operational toil.
12 years of coding experience
12 years of employment as a software developer
MS, Product Development, MS, Product Development at Rochester Institute of Technology
Contributions:5 releases, 6 reviews, 176 commits in 9 years 6 months
Contributions summary:Sean primarily contributed to the PSAppDeployToolkit project by modifying the core PowerShell scripts. They introduced several new features and enhancements including new UI elements, the ability to customize banners and improve error handling. The user also worked on code refactoring and improvements across various existing functionalities within the toolkit, while deprecating outdated functions. They also improved the documentation.
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