Open to opportunities

David Gunthorpe

@davidgunthorpe

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Experienced IT systems administrator specializing in secure infrastructure, cloud fundamentals, and SaaS support.

Portugal

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What I'm looking for

I seek a role focused on secure infrastructure and cloud/SaaS operations where I can lead projects, improve security posture, and mentor teams.

I am an adaptable IT systems administrator with 9+ years of experience in system administration, network management, and SaaS support across secure and global environments. I hold Security+, AZ-900, and AWS Certified Cloud Practitioner certifications and am pursuing bachelor's and master's degrees.

I have provided secure SaaS application support, managed user provisioning and access control via Okta and OAuth, monitored systems with Datadog, investigated incidents, and implemented long-term fixes while documenting procedures to support knowledge management.

As an IT team lead and senior systems administrator, I administered Windows, Linux, and macOS servers, Cisco networking, Active Directory, and ticketing systems for 750+ users, led network projects, ensured compliance with NIST and NATO standards, and trained personnel on security and incident response.

Experience

Work history, roles, and key accomplishments

IT Team Lead - Senior Systems Administrator

United States Navy

Led IT teams managing Windows, Linux, and macOS servers and Cisco networks for classified environments, implemented secure communications/VTC systems, and ensured compliance with NIST and NATO cybersecurity standards.

Cisco Active Directory Windows Server Linux NIST Incident Response

Senior Systems Administrator

Calendly

Provided secure SaaS application support for enterprise clients, managed user provisioning via SSO/Okta, and investigated incidents with root-cause analysis to improve system reliability and data integrity.

Okta Datadog Linux Windows Server MacOS Incident Response Documentation