Marc Johnston
Senior Application Engineer
Jacksonville, Florida, United States
Summary
👤
Senior🎓
Top SchoolMarc Johnston is a Senior Application Engineer with nine years of focused experience and a 20+ year technical career spanning enterprise insurance, banking, education, manufacturing, and defense sectors. He has repeatedly led end-to-end SDLC efforts—migrating legacy applications, integrating diverse systems, and delivering high-quality solutions on time using agile practices. Comfortable across many languages and platforms, Marc combines hands-on development with systems architecture and requirements engineering to bridge technical and business needs. His background includes large-scale migrations (Windows 10 rollouts at CNA), SAP and ABAP work, PLC/manufacturing integrations, and service-oriented architecture design for student systems. A former Apache helicopter airframe mechanic in the U.S. Army, he brings disciplined troubleshooting and systems-thinking to complex software problems. Based in Jacksonville, FL, Marc is a pragmatic problem solver who thrives on modernizing legacy estates while keeping delivery and documentation sharp.
9 years of coding experience
27 years of employment as a software developer
High School Computer Science, High School Computer Science at Kensington High SchoolBachelor of Science - BS Computer Science, Bachelor of Science - BS Computer Science at Rochester Institute of TechnologyGeneral Studies, General Studies at Central Texas CollegeBachelor of Applied Science (BASc) Computer Science, Bachelor of Applied Science (BASc) Computer Science at University at Buffalo
Stackoverflow
1,286reputation
40kreached
106answers
6questions
Github Skills (12)
nethack9
roguelike7
vbnet6
sql-server6
asp-net6
winforms6
datagridview6
entity-framework6
asp-net-core6
angular6
checkbox2
javascript2
Programming languages (1)
Github contributions (5)
marcjohnston/AngbandOS
Jul 2022 - Mar 2025
A modernized HTTP and fully-customizable version of the Angband roguelike game. The OS stands for Operating System. Games can be designed with simple configuration files that can be downloaded and/or edited online with the included HTTP editor.
Contributions:2 releases, 12 PRs, 1860 pushes in 2 years 8 months
gameroguelikeroguelike-gameangbandangbandos
marcjohnston/byMarc.JS.dropDownCheckBoxList
Jul 2017 - Dec 2017
Contributions:12 commits, 2 PRs, 14 pushes in 4 months
javascriptcheckboxcheckbox-listdrop-downdrop
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