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Douglas Van Hollen

@douglasvanhollen

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Cross-functional data engineer with expertise in systems modeling and analysis.

United States

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What I'm looking for

I’m looking for an opportunity to bridge gaps between engineering and product, delivery and project management. I want to grow my technical skillset while enabling others to do their best work.

I am a cross-functional data engineer and database specialist with extensive experience in software engineering, statistical performance analysis, and data modeling. As an OMG® Certified Systems Modeling Professional, I excel in guiding project teams through complex systems design, ensuring stakeholder requirements are met while delighting customers.

Throughout my career, I have held various roles, including Solutions Architect and Senior Software Engineer at Global Payments, where I crafted designs for new systems and developed data lake ETL pipelines. My experience spans multiple industries, including healthcare and finance, where I have led large-scale redesigns of data models and implemented formal project management practices.

With a strong foundation in SQL development, database design, and data visualization, I am passionate about leveraging my skills to drive impactful data solutions. I am committed to continuous improvement and fostering collaboration within teams to achieve shared goals.

Experience

Work history, roles, and key accomplishments

Current

Solutions Architect

Current

Global Payments

Jul 2023 - Present (1 year 11 months)

Crafted designs for new and existing systems, collaborating closely with product and engineering teams to elicit requirements and gain project buy-in. Guided engineering and long-tail project management throughout the product lifecycle, producing high-quality diagrams for documentation and compliance. Developed and enforced technology strategy, acting as Scrum Master and Jira owner for the architecture team.

technology strategy System Design Product Management Engineering Guidance Technology Strategy Scrum Jira Incident Management Documentation Compliance Auditing

Staff Software Engineer

Global Payments

Jul 2022 - Jul 2023 (1 year)

Served as a senior data engineer on a multi-region team, developing data lake ETL pipelines written in Bash and Python, driven by Airflow, and deployed via Jenkins. Defined coding standards and implemented formal project management practices, introducing test-driven development for Apigee proxies and Python Airflow scripts. Supported web APIs written in C#.NET, Java (Spring Boot), and Scala.

BASH C# .NET Data Engineering ETL Python Apache Airflow Jenkins Apigee Java Spring Boot Scala Test Driven Development

Senior Software Developer

Cigna/Evernorth

Oct 2019 - Jul 2022 (2 years 9 months)

Acted as a data specialist attached to multiple teams dedicated to database metadata management, responsible for data modeling, Python API and tool development, and database automation. Owned two highly available multi-environment PostgreSQL installations maintained with Ansible. Led large-scale redesigns of application data models, facilitating business analysis discussions and gaining consensus on data model diagrams.

Data Modeling Python PostgreSQL Ansible Database Automation API Development Business Analysis Looker Incident Management

Lead Software Engineer

FactSet Research Systems

Jun 2011 - Present (14 years)

Provided 24x7 support as a database administrator and SQL development specialist for a four-tier MariaDB environment. Developed and maintained ETL and administration code in Perl and SQL stored procedures, specializing in performance tuning and statistical analysis. Championed agile development and formal operations methodologies, leading the transition from Perforce to Github and introducing large-scale test-driven development.

GitHub Database Administration SQL MariaDB ETL Perl Performance Tuning Statistical Analysis Agile Development Scrum Test Driven Development Incident Management

Developer, Scrum Master

Macmillan Publishers

Oct 2009 - Present (15 years 8 months)

Served as lead engineer for an agile 24x7 operations team, responsible for maintenance and troubleshooting of thousands of academic websites with legacy codebases. Championed agile-oriented WIP tracking using Jira and physical information radiators. Owned team-wide technical writing and documentation, providing statistical analysis and data visualization for executive-level reporting.

Web Operations Agile Methodologies Scrum Jira Technical Writing Documentation Statistical Analysis Data Visualization Troubleshooting

Database Administrator

Fidessa Group PLC

Feb 2007 - Present (18 years 4 months)

Administered and maintained warm-failover Sybase environments across multi-level SDLC, providing 24x7 support through on-call rotation. Developed and maintained Linux and Sybase monitoring environments using Tcl and Perl. Participated in logical and physical database design, formalizing and modernizing disaster recovery procedures including cross-site failover and proactive corruption detection.