Sean Killeen Email and Phone Number

After converting the old wiki pages to a full docs web site, I was offered the role project lead for the NUnit docs. I maintain https://docs.nunit.org.In January 2022 I was invited to become a core team member. It's a huge honor for me to help steer this OSS project that has been so vital to my own journey as a developer.

Cooking up some things. :)

* Served as the technical lead on Excella's largest non-profit client* Single-handedly executed a workshop and coaching engagement for an international financial institution, including a 4-day workshop and 70+ individual coaching sessions.* Taught Excella's Agile Engineering (CSD via ScrumAlliance) and Agile Testing & Automation (ICP-TST/ATA via ICAgile) courses* Served as a leader on Excella's Innovation team, working to build Excella's expertise and capacity for ground-breaking work* As a .NET Xpert, I regularly contributed content, demos, and thought leadership that demonstrated Excella as a leader in the .NET space. * As a leader in the .NET Specialty Area, served as a key developer resource & reference on client engagements; connected Excella with the larger .NET community; grew exceptional careers for our .NET developers; and kept our knowledge of the .NET ecosystem currentI did this by involving and serving a highly-capable team of .NET practitioners.Other accomplishments:* Conceived of, created, and deployed a tool for branded short-links* Conceived of, created, and deployed a tool to summarize company timesheets, resulting in more accurate timekeeping and reduced waste.* Conceived of, created, and deployed a tool to assist in the maintenance of a GitHub organization with 200+ repositories.* Was a co-administrator of the organization's Azure and AWS accounts.* Was the liaison for the organization's Microsoft Partner program* Saved thousands of dollars in cloud costs via automation and policies* Helped lead the organization's GitHub Governance team.* Spear-headed a new company policy and stance on employee intellectual property

Promoted January 2018. (prior experience under last position as Senior Consultant)Current responsibilities:• Technical Lead on Excella's largest non-profit sector account. Responsible for delivery & quality across our 11-member team for an application that administers $7+ billion in retirement benefits.• .NET Xpert, using 20% time to contribute to the wider technology industry via OSS, talks, etc.• Co-trainer in Excella's Agile Engineering course (supporting CSD certifications)• Co-trainer in Excella's ICAgile-certified Agile Testing & Test Automation (ICP-TST/ICP-ATA) Courses• Support BD and proposal efforts as a technical SME / writer• Key contributor to several "Excella Labs" OSS projects

Accomplishments:• Stewarded a successful 5+ year legacy modernization effort involving ~2.5 million lines of code -- overseeing delivery, developer practices, DevOps support, and process improvements. (Tech stack includes .NET, WebAPI, SQL Server, TeamCity, OctopusDeploy, Serilog/Seq, NUnit, Angular)• Speaker at national & local conferences as well as user groups -- topics include OSS, Akka.NET, ElasticSearch, and TeamCity/OctopusDeploy.• Co-authored Excella's ICAgile-certified Agile Testing & Test Automation (ICP-TST/ICP-ATA) Courses • Conceived of and launched xluh.co, a free OSS URL shortener using .NET Core.• Authored video walkthrough of an Agile engineering program as a tutorial for Agile Engineering course students• Key contributor on several proposal efforts• Promoted to Managing Consultant in January 2018.

I was hired to support the CPMS project as a sub-contractor (Senior Developer / Lead). While the opportunity turned out to be different than I first understood, I was able to accomplish several things in my short time there:• Authored over 500 unit tests, uncovering several bugs in the process• Presented to the team on concepts around automated testing, SOLID principles, and design patterns• Presented to the team on git/GitHub for TFS developers

Along with my team, I created, maintained, and improved the systems responsible for the delivery of quality data to the largest commercial real estate data provider in the world, including Apartments.com and ApartmentFinder.com.Accomplishments:• Delivered mission-critical code single-handedly, sometimes in as little as 48 hours• Converted Legacy MSTest suites to xUnit 2.0 with Moq/FluentAssertions for better extensibility and build system integration• Authored a complex back-end data project that had 0 issues in production as long as I remained at Costar (several months at least). Mentored 2 teammates in TDD principles (Arrange/Act/Assert, mocking, integration vs. unit testing, consistency, trustworthiness) to achieve this using the xUnit framework and Moq/FluentAssertions libraries.• Owned several technical aspects of a large automated data collection process at the heart of the business• Automated and improved the build pipeline of several projects and advocated for continuous integration where it did not previously exist• Was recognized for my efforts during CoStar’s company day, and with a gift of restricted stock• Introduced and evangelized concepts of IT Service Management and ITIL principles• Oversaw technical solutions into production across ASP.NET MVC, WebAPI 2, MVVM JavaScript frameworks, console applications, WPF, PowerShell, MSBuild, etc. • Introduced release notes and documentation for applications under my purview, a concept that had not yet been implemented

• Oversee major aspects of development process• Lead development team in delivery of new flagship product platform• Other Development / DevOps tasks as necessaryAccomplishments:• Re-wrote a major database operation, taking run time from 30+ minutes to under 15 seconds.• Created templates to document feature development and issue management in a consistent, reproducible manner• Introduced key Specification by Example concepts• Utilized Trello with a custom process to close over 500 issues / feature requests in the few months before go-live.• Delivered an Invoice Upload system using TDD principles• Introduced more modular javascript code for isolation• Introduced KnockoutJS and concepts surrounding MVVM• Added predictable flow on client-side code using jQuery promises more effectively.• Utilized powershell workflows to alter batch-download script; reduced run-time from 1 hour to 6 minutes. • Envisioned and implemented an automated build & delivery process that met SSAE16 requirements.• Conceived and authored a 35-page draft guide on "the path forward" for company's IT considerations; this guide is now being used to shape our entire IT strategy.• Conducted a gap analysis of entire development process, educating management on concepts and making recommendations for replacement technology.

• Manage software utilized by dept. customers, including Maximo, desktop software, and various custom utilities• Maintain, repair, troubleshoot, and procure server and desktop equipment as necessary• Develop custom web, scripting, and software solutions for customers as needed • Design documentation and user communication to facilitate effective use of products and standards/practices• Customer interaction, support, and training with a keen eye towards customer satisfactionAccomplishments:• Key figure in massive upgrade of IBM Maximo software from v5 to v7.1 and follow-up work• Leading the effort to assist customers in revitalizing business processes• Delivered business intelligence enabling visibility into chargeback system, potentially saving thousands of dollars.• Updated and reorganized 150+ reports to ensure they delivered accurate and presentable intelligence• Authored over 70 user-friendly documents describing processes, practices, and user reference material• Created end-to-end continuous integration & delivery system for .NET development • Began working towards ITIL-compliant practices across dept.

Contract Position at JHU APL before converting to full time in November 2012.

Contract position via Dakota Consulting, Inc.• Key figure in upgrade: 13 years of complex upgrades and a move from AIX Servers to Windows Server 2003• Full support ticket lifecycleAccomplishments:• Reduced upgrade process timeframe from 1 month to 4 hours through development of extensive documentation (100+ pages) and automated scripting.

Contract Position via Dakota Consulting, Inc.• Ticket Resolution via Remedy – full ticket life-cycle• Authored Guide to Help Desk Issue Resolution• One-on-One training sessions with application usersAccomplishments:• Successfully resolved over 10 issues before even having access to the system itself

• Contract work, National Institute of Standards & Technology (NIST)• Manage entire corporate IT infrastructure, including wired and wireless network, servers (physical and virtual), user machines, VoIP phones, web site, and corporate e-mail system• Create, update, and enforce policies and processes to align IT and business goals• Key figure in developing and executing Dakota’s long-term IT roadmapAccomplishments:• Spearheaded creation of formal IT Department• Key figure on implementing .NET development standards; created “ready-made” VM environments for .NET development projects to support source management, continuous integration, and other tools.• Researched, coordinated, and oversaw IT during move of corporate office to new location• Implemented source-code management and trained developers during critical project emergency• Developed corporate partnership from one conversation in a last-minute meeting with no prior knowledge• Filled 50% of open positions while assisting during recruiter’s absence• Found 100+ potential contracts using crossed-referenced exports from the FPDS and CCR web sites

My roles:• Design Development Environment & build process• Design and create Business Objects, Database, and C# back-end code• Design code tests and implement test architecture

• Designed a custom, standards-compliant site for the RJ Fellows Honors Program• Managed various technology needs• Implemented wide range of communication technology, from blogs to on-line portfolio management.

Training:• Recommended by two professors to become a writing tutor• Completed in a 400-level Writing Theory course• Observing tutoring sessions and wrote an analytical piece on theory and practice in the writing centerRole:• Served as a Writing Assistant for 3 different First-Year Seminar courses. • Held 3+ individual meetings with each student in the class• Assisted in implementing personalized writing improvement plans • Led classes and modeled class discussion when necessary.• Reviewed and gave feedback on all writing assignments

• Began development efforts on next version of company's flagship product• Classic ASP Development and maintenance of legacy code• SQL Database administrationAccomplishments:• Brainstormed, proposed, and implemented new hosting plan solution to save $60,000 annually.

Managed fraternity and school accreditation processes; guided the chapter through a defining period in our chapter's history.

• Key figure in a sales dept. ranked in the regional top-10.

I began work for Bristol Township School District while a student in school. I managed their network across 14 buildings and thousands of computers, working full-time during the summer and part-time during school years.Throughout my time at BTSD, I oversaw network upgrades, installed entire computer labs from out-of-box to completely functioning, developed a functioning web site and a maintenance work order intranet application, and dealt with customer (teacher) support tickets on a regular basis.

I was contracted by another developer to debug and fix classic ASP and SQL code for an intranet site at Templeton College.