John Griebling
Principal Consultant at Griebling LLC
Denver Metropolitan Area United States
Summary
👤
Senior🎓
Top SchoolJohn Griebling is a seasoned Principal Consultant and retired technology executive with over 35 years of experience designing and delivering large-scale telecommunications, IoT, and broadband network solutions across defense, commercial, and industrial markets. He has led global system engineering, product strategy, and technical sales for major firms including Itron, ABB/Tropos, Enron, and Level 3, and founded a mesh-broadband startup that deployed one of the first city-wide Wi‑Fi mesh trials. Known for blending hands-on engineering with strategic leadership, he excels at mentoring teams, closing complex deals, and guiding innovators from concept through market launch. Based in Denver, he now advises customers, startups, and investors on IIoT, terrestrial and non‑terrestrial broadband, and secure network architectures as an independent consultant. A less obvious strength: his career threads together early DoD aerospace systems work with later large-scale utility and smart‑city deployments, giving him rare depth across mission-critical and commercial networking domains.
11 years of coding experience
45 years of employment as a software developer
International School BangkokBS Computer Science and Electrical Engineering, BS Computer Science and Electrical Engineering at Penn State University
Github Skills (61)
circuit10
programming-language10
mathematics10
bigdecimal10
fixed-point10
maths10
multiprecision10
latex10
typeset10
interval-arithmetic10
complex10
swift10
equation10
logic10
ipad9
Programming languages (5)
Github contributions (5)
mgriebling/BigInt
Jun 2023 - Nov 2024
Arbitrary-precision integer arithmetic in Swift
Contributions:11 releases, 1 PR, 38 pushes in 1 year 5 months
mgriebling/Engineers-Calculator
Aug 2017 - Feb 2022
Contributions:34 pushes, 1 branch in 4 years 6 months
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