JG

Open to opportunities

Jonathon Garnsey

@jonathongarnsey

I build and support secure IT infrastructure across maritime and insurance environments.

What I'm looking for

I'm looking to continue growing in cybersecurity and secure infrastructure, collaborate with like-minded professionals, tackle meaningful technical challenges, and contribute to initiatives that improve global safety.

I'm a Senior System Engineer at Mainstay Maritime, building on infrastructure engineering experience at Auto-Owners Insurance and DevSecOps internship work at BrainGu.

I've earned an M.S. in Cybersecurity and a B.S. in Management Information Systems from Grand Valley State University. I'm focused on continuous learning, strengthening cybersecurity skills, and contributing to global safety initiatives through secure, reliable technology.

Experience

Work history, roles, and key accomplishments

MM

Current

Senior System Engineer

Current

Mainstay Maritime

Jun 2025 - Present (1 year 4 months)

Senior System Engineer at Mainstay Maritime, responsible for system engineering and infrastructure.

AI

Insurance Application Infrastructure Engineer

Auto-Owners Insurance

Jun 2022 - Jun 2025 (3 years)

Insurance Application Infrastructure Engineer at Auto-Owners Insurance, focusing on application infrastructure and debugging.

Debugging Jenkins Java Problem Solving Groovy

MO

Information Technology Intern

MOKA

May 2021 - Nov 2021 (6 months)

Information Technology Intern at MOKA, assisting with IT support and network administration.

Debugging Computer Hardware Problem Solving Network Administration

BR

DevSecOps Engineering Intern

BrainGu

May 2020 - Aug 2020 (3 months)

DevSecOps Engineering Intern for the summer of 2020.

Debugging Problem Solving

SH

Window Technician

Shine Window Care and Holiday Lighting Headquarters

Apr 2019 - Aug 2019 (4 months)

Customer Relations ● Handling Company Finances ● Window Cleaning ● House Washing

Problem Solving

TY

Composite Technician

Tiara Yachts

Apr 2018 - Aug 2018 (4 months)

Composite Technician at Tiara Yachts, working on composite materials and problem solving.

Problem Solving

Education

Degrees, certifications, and relevant coursework

GU

Grand Valley State University

Master of Science, Cybersecurity

2021 - 2023

Pursued a Master of Science in Cybersecurity, focusing on advanced security practices and technologies.

GU

Grand Valley State University

Master of Science - MS, Cybersecurity

2021 - 2023

GU

Grand Valley State University

Bachelor's degree, Management Information Systems

2017 - 2021

Minor in Business (2021)

ZS

Zeeland West High School

High School Diploma

2013 - 2017

Tech stack

Software and tools used professionally

Jenkins

Java

Availability

Open to opportunities

Location

United States

Authorized to work in

Job categories

Systems Engineer Infrastructure Engineer DevSecOps Engineer Cybersecurity Engineer IT Support Specialist Network Administrator Senior Systems Engineer Principal Systems Engineer Systems Engineer

Skills

Infrastructure Debugging Jenkins Java Problem Solving Groovy Computer Hardware Network Administration Information Security Management Cybersecurity Information Systems DevSecOps

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