WILLIAM K. SOUSA, JR. (BILL)

WILLIAM K. SOUSA, JR. (BILL)#

Engineer • Data Analyst • Python Developer • Open Source Maintainer

Harrisburg, PA 17112 | WKSJR99@MSN.COM
LinkedIn: http://www.linkedin.com/in/bill-sousa-251245190
GitHub Public Profile: BillSousa
Online Resume: https://bill-sousa-resume.readthedocs.io/en/latest/

Summary#

  • FORMER CHEMICAL / MANUFACTURING ENGINEER NOW DATA ANALYST / PYTHON DEVELOPER

  • Data analyst, Python developer, and open-source maintainer with expertise in building scalable, interoperable data analytics tools

  • Creator of pybear, an open-source Python data analytics library built on scikit-learn conventions

  • End-to-end proficiency in Python development, documentation, testing, packaging, and CI/CD

  • Proficient in data querying, analysis, and presentation with Python, SQL, Excel / VBA, and Tableau

  • Chemical Engineer / MBA with 15+ years’ progressive experience in lean manufacturing, 10+ years in roles supporting the manufacture of electrical connectors for consumer electronics

Computer Skills#

Proficient / Expert
Python 3 / PyCharm / Jupyter Notebook
Libraries & Frameworks: numpy, pandas, polars, scipy, scikit-learn, xgboost, joblib, dask, dask-ml, tensorflow
Developer Tools: poetry, tox, pytest
Documentation: Sphinx, Markdown, reStructuredText, numpydoc, Read the Docs
CI/CD: GitHub Actions
Platforms: Linux, Windows
Excel (VBA, Solver, PowerPivot), SQL Server / MySQL, Tableau Desktop 2022 / Server, SAP-PP, Minitab, Word, PowerPoint, Access, Project
Some Exposure
Base SAS, Power BI Desktop / Service, AutoCAD

Coding Experience#

OPEN-SOURCE PYTHON CREATOR AND MAINTAINER, 2024 - Present
Designed and developed pybear, a full-featured Python data analytics utilities library for data preprocessing, model selection, and text analytics using the scikit-learn API, optimized for real-world data.
GitHub repo: PylarBear/pybear
Documentation Site (Read the Docs): https://pybear.readthedocs.io/
PyPI project site: https://pypi.org/project/pybear/
Languages: Python 3.10–3.13
Platforms: Linux, macOS, Windows
Implemented joblib parallelism, bigger-than-memory data processing with incremental fitting, and missing value handling
Interoperable with numpy, pandas, polars, and scipy.sparse data containers
Wrote complete user and API documentation using Sphinx, published to Read the Docs
Built and maintained automated tests and CI with GitHub Actions for Python 3.10–3.13 on Linux/macOS/Windows
Packaged and published installable distributions to PyPI

PROFESSIONAL DEVELOPMENT SABBATICAL, 2015 – Present
Added or expanded competency in
Python 3 / PyCharm / Jupyter and popular third party packages
Linear / Logit / Softmax Regression (scikit)
Supervised Neural Networks (scikit, tensorflow)
Support Vector Machines (scikit)
Clustering (scikit)
Decision Trees (scikit, xgboost, lightgbm)
Tableau Desktop 2022 / Server
Power BI Desktop / Service
MySQL / SQL Server
Base SAS / Studio 3.8
Excel / VBA

Other Skills (Engineering, Lean Manufacturing, Six Sigma)#

Engineering Functions:
Product development, project management, process / product failure analysis and recovery, engineering experiment design, execution, and analysis, process modeling, cost estimates, new part quotes, analytical method on-boarding, process troubleshooting, tooling design, SOP / BOM creation and maintenance
Analytical Methods:
Atomic absorption spectrophotometry (AAS), X-ray fluorescence (XRF), UV-visible spectrophotometry (UV-Vis), scanning electron microscopy (SEM), gas chromatography (GC), digital microscopy
Lean / Six Sigma Tools:
Lean / six sigma green belt, Pareto / histogram analysis, Statistical process control (SPC), Design of experiment (DOE), 5S, DMAIC, FMEA, Kaizen, Kanban

Other Professional Experience#

TE CONNECTIVITY (TYCO ELECTRONICS / TYCO INTERNATIONAL), 2005 – 2015
A multi-billion dollar company that manufactures products that connect the flow of power and data for the consumer electronics, automotive, aerospace, and communications industries.
Manufacturing Development Engineer, Middletown, PA, 2013 – 2015
Member of a centralized operations support group with comprehensive expertise in reel-to-reel electroplating: product / process / technology development, existing product / process failure analysis and recovery, cost savings identification and execution, R&D trials. Represent plating on product development teams, input on design for cost and manufacturability.
Materials Research Engineer, Middletown, PA, 2012 – 2013
Comprehensively own electroplating and waste water treatment operations in support of renewed plating emphasis in materials R&D group. Provide perspective on internal manufacturing base capabilities and state-of-the-art practices. Produce lab-scale batch samples for research focused on durability, porosity, novel metallurgies and substrates, etc.
Plating Engineer, Rock Hill, SC, 2009 – 2011
Process owner of a selective photoresist masking reel-to-reel precious metal electroplating line. Plant plating point of contact for product migration, insource / outsource activities, Engineering Change approvals, new part quotes, cost estimates, and R&D samples. Successfully overhauled and delivered a prototype miniature line as part of an integrated manufacturing cell development project.
Plating Engineer, Carlisle, PA, 2005 – 2009
Process owner of several reel-to-reel selective precious metal electroplating lines. Drove line rate, scrap, and precious metal usage cost savings projects from concept to completion.

HANDY AND HARMAN ELECTRONIC MATERIALS, East Providence, RI 2004 – 2005
Contract provider of integrated stamping, electroplating, and molding solutions. Now operated by Interplex.
Process Engineer
Off-shift process engineering and wet lab support for 9 reel-to-reel selective precious metal electroplating lines. Primary engineer for 2 rack lines. Troubleshot equipment and chemistry, and performed routine wet chemical analyses.

UTC FUEL CELLS, South Windsor, CT, 2000 – 2002
A former subsidiary of United Technologies that developed and produced phosphoric acid and PEM fuel cells for automotive, commercial building, space, and marine applications.
Associate Engineer Test / Reliability
Instructed and supported endurance testing of PEM fuel cells for maximum yield of performance data. Authored operating and test procedures, troubleshot causes of test stand and fuel cell failure, and implemented corrective actions.

Education#

Bachelor of Science, Chemical Engineering, with Distinction
The University of Rhode Island, 1999
Cumulative GPA: 3.49 of 4.00
Honors: Cum Laude, Nelson C. White Dean’s Award for performance

Master of Business Administration
The University of Rhode Island, 2003
Cumulative GPA: 3.59 of 4.00
Honors: Magna Cum Laude

Contents