Dan
Casmas

Senior Systems Engineer

Own enterprise email security, Google Workspace administration, and a broad portfolio of SaaS platforms for 2,000+ users. Lead high-stakes cross-functional initiatives spanning security, legal, finance, and engineering.

• Spearheaded architecture, implementation, and configuration of Proofpoint — fortifying SPF, DMARC, and DKIM and significantly reducing email-based threat exposure.
• Administer Google Workspace for 2,000+ users, building PowerShell automations that eliminate manual overhead and drive measurable cost savings.
• Led a $900K+ Microsoft EA renewal and drove multi-platform migration evaluations across Miro, Lucid, and Figma — coordinating with C-suite, legal, and finance throughout.
• Architected Kubernetes-based infrastructure for internal automation tooling, including backup and recovery workflows running at production scale.
• Among the first at Sonos to deploy and govern AI tooling at scale — managing Claude AI integration for 2,000+ users, auditing OAuth connectors for security compliance, and establishing organizational AI policy.
• Primary administrator for Google Workspace, Slack, Zoom, Lucid, Miro, and Figma — owning licensing, provisioning, and policy for all platforms.

Systems Engineer

Administered a broad portfolio including Google Workspace, Proofpoint, Active Directory, Slack, Box, Automox, Qualys, and Wrike — troubleshooting complex issues and keeping platforms running cleanly across a fast-moving organization.

• Orchestrated the migration of 1,000 users from Office 365 to Google Workspace with no disruption to day-to-day operations.
• Managed the migration of 1,000 users from Box to Google Drive, consolidating the file storage footprint and reducing licensing costs.

Systems Engineer

Administered Google Suite, Zoom, Proofpoint, Active Directory, Slack, and Facebook Workplace. Maintained DNS infrastructure including DMARC, SPF, and DKIM.

• Streamlined applications and automated reporting workflows, reducing manual overhead across the team.
• Played a key role in transitioning the entire global workforce to remote work when COVID-19 hit — a weeks-long emergency effort that required fast coordination across every platform the company ran.

O365 Team Leader

Led second and third-level support for 8,000 users across a large financial services organization — 13 years as the go-to expert for messaging, email security, and platform operations. Served as SME for Exchange, Office 365, and the full Microsoft messaging stack, mentoring the team and guiding leadership through major platform decisions.

• Led two full-scale email platform migrations for 8,000 users — first from Lotus Notes to on-premises Exchange, then from Exchange to Office 365 — serving as Team Leader and Design Partner on both.
• Designed and owned Microsoft SCOM across three major versions (2012, 2015, and 2018), giving the organization continuous visibility into messaging system health over more than a decade.
• Provided third-level escalation support and on-call coverage for 8,000 users — handling Exchange, Outlook, OWA, Teams, Skype, backup, and recovery issues at a major financial services firm.
• Administered IronPort, Tumbleweed (Axway), and Proofpoint across the organization's full email security lifecycle, while maintaining disaster recovery design and routine testing for Active Directory and messaging systems.