Sr. Staff Engineer - Platform Data Scientist

• Sep 2023 - Present

Staff Data Scientist & Software Engineer

• Oct 2022 - Aug 2023

Senior Data Scientist & Software Engineer

• Apr 2021 - Oct 2022

At the intersection of the SW Engineering and DS Research teams, I productionalize DS & ML models. I help develop models, calibrations, normalizations, API endpoints, ingest and output pipelines, and QA tools. Our effort is focused on creating a codebase and environment to easily deploy and test models.

Machine Learning Engineer

• Aug 2020 - Apr 2021

Cross platform advertising impact measurement as part of the Data + Math Engineering team. I sit at the intersection of DS Research and SW Engineering. We developed version 2 of our measurement offering by incorporating new data sources to increase our entity samples to O(100MM), deploying our pipelines and algorithms inside a partners walled garden (AWS), and developed & deployed new time series models all to allow more accurate advertising impact measurements.

Lead Data Scientist

• Mar 2020 - Aug 2020

Supply Chain Forecasting Comparison: Quantitative analysis of different forecasting models predicting demand at point of sale for thousands of products across hundreds of locations. (SQL, Pandas)

Data Scientist

• Sep 2019 - Mar 2020

Holiday Peak Fulfilment Dashboard: Created dashboard for other business units to monitor the impact of order fulfillment strategies on individual locations during the critical holiday peak business. (SQL, Tableau) Fulfilment Strategy Impact: Quantify impact of fulfillment strategies on specific areas of the business. (SQL, Pandas).

Independent Data Science Consultant

• Apr 2020 - Jul 2020

During the COVID crisis furlough, I worked as an Independent Data Science Consultant in the Traffic Prediction and Healthcare AI spaces. I developed skills in time series forecasting, AWS, Spark, longitudinal healthcare data, and project management. During the COVID crisis furlough, I worked as an Independent Data Science Consultant in the Traffic Prediction and Healthcare AI spaces. I developed skills in time series forecasting, AWS, Spark, longitudinal healthcare data, and project management.

Data Science Fellow

• Jun 2019 - Sep 2019

Project: Predicted users likely to churn out of the Steam online community. Developed a metric measuring the collective health of community groups. Provided webpage to supply recommendations and predict impact of actions to keep users engaged. (scraping, Pandas, postresSQL, Flask) Project: Predicted users likely to churn out of the Steam online community. Developed a metric measuring the collective health of community groups. Provided webpage to supply recommendations and predict impact of actions to keep users engaged. (scraping, Pandas, postresSQL, Flask)

Postdoctoral Researcher

• Sep 2015 - Jun 2019

Based at CERN working on the ATLAS experiment. Wrote C++ and Python programs to comb large datasets for signs of new physics. Used various data analysis tools, statistical methods and machine learning techniques to test different hypotheses and reduce data background to zero. Supported and organized multiple projects educating the general public about the science done at CERN. Guided VIP tours, introducing people without technical backgrounds to the techniques and benefits this… Show more Based at CERN working on the ATLAS experiment. Wrote C++ and Python programs to comb large datasets for signs of new physics. Used various data analysis tools, statistical methods and machine learning techniques to test different hypotheses and reduce data background to zero. Supported and organized multiple projects educating the general public about the science done at CERN. Guided VIP tours, introducing people without technical backgrounds to the techniques and benefits this data can give the world. Coordinated online tour programs targeting community events and classrooms Served as Pixel Run Coordinator, managing the day to day operations of the ATLAS Pixel Detector (~90 million individual readout channels) developing real time solutions to keep the continuously running system healthy. Resolving detector issues involving; Sensor hardware, Computing hardware, Computing firmware, Data Acquisition Software, etc... Required 24-7 support to maintain & and produce immediate solutions needed when problems arise. I coordinated activities on multi-Million dollar detector while organizing the effort of 40+ scientists and engineers. Developed, managed, and deployed embedded software and host software as Data Acquisition Coordinator for the ATLAS Pixel Detector. Managed a team of 20 Scientists and Engineers working to upgrade and maintain the ATLAS Pixel readout system. The readout speed was doubled, downtime significantly reduced, and data corruption reduced many times over. The system uses custom hardware driven by a Power PC running Xilinx and embedded C++. Show less Based at CERN working on the ATLAS experiment. Wrote C++ and Python programs to comb large datasets for signs of new physics. Used various data analysis tools, statistical methods and machine learning techniques to test different hypotheses and reduce data background to zero. Supported and organized multiple projects educating the general public about the science done at CERN. Guided VIP tours, introducing people without technical backgrounds to the techniques and benefits this… Show more Based at CERN working on the ATLAS experiment. Wrote C++ and Python programs to comb large datasets for signs of new physics. Used various data analysis tools, statistical methods and machine learning techniques to test different hypotheses and reduce data background to zero. Supported and organized multiple projects educating the general public about the science done at CERN. Guided VIP tours, introducing people without technical backgrounds to the techniques and benefits this data can give the world. Coordinated online tour programs targeting community events and classrooms Served as Pixel Run Coordinator, managing the day to day operations of the ATLAS Pixel Detector (~90 million individual readout channels) developing real time solutions to keep the continuously running system healthy. Resolving detector issues involving; Sensor hardware, Computing hardware, Computing firmware, Data Acquisition Software, etc... Required 24-7 support to maintain & and produce immediate solutions needed when problems arise. I coordinated activities on multi-Million dollar detector while organizing the effort of 40+ scientists and engineers. Developed, managed, and deployed embedded software and host software as Data Acquisition Coordinator for the ATLAS Pixel Detector. Managed a team of 20 Scientists and Engineers working to upgrade and maintain the ATLAS Pixel readout system. The readout speed was doubled, downtime significantly reduced, and data corruption reduced many times over. The system uses custom hardware driven by a Power PC running Xilinx and embedded C++. Show less

Visiting Researcher

• Jan 2013 - Jun 2019

Most of my PhD and Postdoctoral work was based on-site at CERN. Most of my PhD and Postdoctoral work was based on-site at CERN.

Graduate Research Assistant

• Aug 2012 - Aug 2015

Divided time based at CERN and Baltimore working on the CMS Experiment. Identified, published, and used a new analysis technique to measure the possible Higgs couplings to vector bosons. These methods are based on the Matrix Element Likelihood Approach used on both CMS and ATLAS and have been used in successful publications on both experiments. I served as editor and leader of the first CMS analysis results for these measurements. Developed an analysis to constrain the width of… Show more Divided time based at CERN and Baltimore working on the CMS Experiment. Identified, published, and used a new analysis technique to measure the possible Higgs couplings to vector bosons. These methods are based on the Matrix Element Likelihood Approach used on both CMS and ATLAS and have been used in successful publications on both experiments. I served as editor and leader of the first CMS analysis results for these measurements. Developed an analysis to constrain the width of the Higgs boson. This analysis used the many variables simultaneously, including fundamental quantum mechanical decay matrix elements, to model signal, background, and the quantum interference between them in a completely novel way. This analysis constrained quantum numbers with 100 times the precision of any previous work. Refined the multi-dimensional statistical analysis used to discover the Higgs boson in the four lepton decay channel. Produced the final statistical interpretation for the local significance, overall signal strength, production mechanism, and spin-parity quantum number analysis. This work investigates the effects of many systematic uncertainties, combined inputs from various different working groups, and verified the validity of the final statistical interpretation. Created a strategy to differentiate between possible production mechanisms for the (now) Higgs boson at CMS decaying to four leptons. The methods used new kinematic information from events to optimise the separation between different production modes of the Higgs boson. These methods lead to an increased in overall sensitivity as well as allowing the decay channel to contribute to couplings measurements. Developed software to do a prompt alignment of the CMS silicon pixel detector. This routine checks the alignment on a run-buy-run basis. It provides the necessary inputs to understand the positions of millions of readout channels before the reconstruction of data begins. Show less Divided time based at CERN and Baltimore working on the CMS Experiment. Identified, published, and used a new analysis technique to measure the possible Higgs couplings to vector bosons. These methods are based on the Matrix Element Likelihood Approach used on both CMS and ATLAS and have been used in successful publications on both experiments. I served as editor and leader of the first CMS analysis results for these measurements. Developed an analysis to constrain the width of… Show more Divided time based at CERN and Baltimore working on the CMS Experiment. Identified, published, and used a new analysis technique to measure the possible Higgs couplings to vector bosons. These methods are based on the Matrix Element Likelihood Approach used on both CMS and ATLAS and have been used in successful publications on both experiments. I served as editor and leader of the first CMS analysis results for these measurements. Developed an analysis to constrain the width of the Higgs boson. This analysis used the many variables simultaneously, including fundamental quantum mechanical decay matrix elements, to model signal, background, and the quantum interference between them in a completely novel way. This analysis constrained quantum numbers with 100 times the precision of any previous work. Refined the multi-dimensional statistical analysis used to discover the Higgs boson in the four lepton decay channel. Produced the final statistical interpretation for the local significance, overall signal strength, production mechanism, and spin-parity quantum number analysis. This work investigates the effects of many systematic uncertainties, combined inputs from various different working groups, and verified the validity of the final statistical interpretation. Created a strategy to differentiate between possible production mechanisms for the (now) Higgs boson at CMS decaying to four leptons. The methods used new kinematic information from events to optimise the separation between different production modes of the Higgs boson. These methods lead to an increased in overall sensitivity as well as allowing the decay channel to contribute to couplings measurements. Developed software to do a prompt alignment of the CMS silicon pixel detector. This routine checks the alignment on a run-buy-run basis. It provides the necessary inputs to understand the positions of millions of readout channels before the reconstruction of data begins. Show less

Undergraduate Research Assistant

• Aug 2008 - Aug 2010

Time divided between Lawrence, Kansas and PSI, in Switzerland (2 summers + 1 semester) Setup custom electronic hardware and software necessary to study silicon pixel detectors in a new lab environment. Including setup of x-ray radiation test stands, validating custom hardware, programming FPGAs, and making sure the lab complied with all safety regulations. Studied the charge collection efficiency of irradiated silicon pixel detectors in preparation for an upgraded detector. This… Show more Time divided between Lawrence, Kansas and PSI, in Switzerland (2 summers + 1 semester) Setup custom electronic hardware and software necessary to study silicon pixel detectors in a new lab environment. Including setup of x-ray radiation test stands, validating custom hardware, programming FPGAs, and making sure the lab complied with all safety regulations. Studied the charge collection efficiency of irradiated silicon pixel detectors in preparation for an upgraded detector. This work was published in NIM A. Wrote firmware (VHDL) to run on ALTERA FPGA, simulating integrated circuit chips that are necessary for interaction with a CMS pixel module when supplies ran low. Software development for CMS Detector Control Systems history logging. Studied cosmic ray background for needed for future CMS physics analysis. Show less Time divided between Lawrence, Kansas and PSI, in Switzerland (2 summers + 1 semester) Setup custom electronic hardware and software necessary to study silicon pixel detectors in a new lab environment. Including setup of x-ray radiation test stands, validating custom hardware, programming FPGAs, and making sure the lab complied with all safety regulations. Studied the charge collection efficiency of irradiated silicon pixel detectors in preparation for an upgraded detector. This… Show more Time divided between Lawrence, Kansas and PSI, in Switzerland (2 summers + 1 semester) Setup custom electronic hardware and software necessary to study silicon pixel detectors in a new lab environment. Including setup of x-ray radiation test stands, validating custom hardware, programming FPGAs, and making sure the lab complied with all safety regulations. Studied the charge collection efficiency of irradiated silicon pixel detectors in preparation for an upgraded detector. This work was published in NIM A. Wrote firmware (VHDL) to run on ALTERA FPGA, simulating integrated circuit chips that are necessary for interaction with a CMS pixel module when supplies ran low. Software development for CMS Detector Control Systems history logging. Studied cosmic ray background for needed for future CMS physics analysis. Show less

Visiting Researcher

• Apr 2008 - Aug 2009

Two summers and one semester of Undergraduate Research as part of the PIRE program while working for the University of Kansas. Two summers and one semester of Undergraduate Research as part of the PIRE program while working for the University of Kansas.