Facilitated and guided development on the Eclipse OMR project, as committer and code owner for the garbage collection, threading, and portability components.Drove advancements in the OpenJ9 JVM by designing, reviewing, or implementing hundreds of code changes in OMR.Designed new APIs for advanced GC features such as concurrent scanning, scavenging, and heap compaction.Created Om, a library providing a general object model that meets the needs of both static and dynamically typed languages, which language designers can use to implement their own language-specific object semantics.Worked with academic researchers to develop new technologies and tooling, such as cold object storage, GC-driven object serialization, and variant aware static analysis tools.

Helped extract the garbage collector, portability, and threading components from the OpenJ9 JVM to create Eclipse OMR.Prototyped GC integrations into a variety of language runtimes, including Spidermonkey, V8, MRI Ruby, and CPython, using knowledge gained to improve the functionality and design of OMR.Transitioned OpenJ9 and OMR from in-house tooling to a cmake build system, jenkins based CI, and the google test framework, increasing developer productivity and making it easier to engage with the public community.Developed on Windows, Linux, macOS, AIX, and z/OS, and architectures X86, PPC, and z/Architecture.Spoke at conferences including CASCON, RubyKaigi, CUSEC, and SPLASH.