I manage a team responsible and for delivering Telephony software for iOS, watchOS, macOS, and tvOS products.

I manage a team responsible and for delivering Telephony software for iOS, watchOS, macOS, and tvOS products.

I manage a team of engineers delivering Telephony software capabilities for iOS, watchOS, and macOS products.

At Apple I am responsible for developing Telephony Software that is deployed on hundreds of millions of iOS, Mac OS X, watchOS, and tvOS devices around the world. I have developed software to support tent-pole features included in the iOS 7, iOS 8, and iOS 9 operating systems.

Developed system software code for three generations of Blue Gene supercomputers. Team leader in charge of the design, development, and support of the high level control system software on Blue Gene/Q for managing, servicing, and partitioning the systems resources. Collaborated with IBM colleagues across divisions, DOE labs, and vendors to deploy over 150 racks at both Lawrence Livermore and Argonne National Labs. These systems were the #1 and #3 supercomputers in the world as of June 2012.All code is written as multithreaded services and daemons, running indefinitely on high-availability, high-load servers without interruptions, crashes, and absent of memory leaks. A DB2 database is leveraged for machine and operating status containing hundreds of tables and several million rows.Version control primarily with SVN, and secondary with git. The repository contains nearly 3 million lines of code, online documentation using Doxygen and LaTeX, DB2 database schema, and several thousand automated unit tests. Packaging delivered via RPMs.Interfaced with external Independent Software Vendors (ISV) to understand their requirements and drive towards a solution. This work included collaborations with SchedMD for the SLURM resource manager, Argonne's ALCF for the Cobalt job scheduler, Rogue Wave for the TotalView debugger, and internally within IBM for the LoadLeveler workload scheduler.This project won the 2008 National Medal of Technology from the United States Government for its *systems architecture, design, and software, which have delivered fundamental new science, unsurpassed speed, and unparalleled energy efficiency and have had a profound impact worldwide on the high-performance computing industry.*

I researched and developed software for process management and monitoring on Linux clusters. The project was funded by the Department of Energy over multiple years for collaboration with other DOE research labs. I coordinated the design with other graduate and undergraduate students, managed defects, and wrote and published several peer reviewed papers and a thesis.Version control with subversion, bug and feature tracking using Trac.

I was a co-op software engineer during the summer while finishing my graduate degree. I helped design and develop the efix installation process and prototype a GUI administrative console.