Mathan Grubmaer

6+ years of experience designing, securing, and optimizing enterprise server,

virtualization, and hybrid Microsoft environments. Proven track record of improving infrastructure stability,

reducing operational risk, strengthening backup and disaster recovery readiness, and standardizing systems across multi-site environments. Experienced in high-availability architectures, lifecycle management, security hardening, and process-driven infrastructure operations.

System Engineer January 2022 – January 2026

InTech IT Solutions, Bowling Green, Ohio

• Virtualized 50+ production workloads across VMware, Hyper-V, and Proxmox environments, reducing

hardware costs by 30% and improving recovery time objectives (RTO).

• Designed and executed virtualization migrations across VMware, Hyper-V, and Proxmox platforms,

reducing hardware footprint and improving resource utilization while increasing backup reliability and recovery speed.

• Led migration of 200+ on-premises Exchange mailboxes to Microsoft 365 (Exchange Online), reducing

infrastructure overhead, improving availability, and enabling modern authentication with MFA and

Conditional Access policies.

• Implemented organization-wide MFA and access control policies across Microsoft 365, VPN, and

administrative accounts, significantly strengthening security posture without disrupting end-user productivity.

• Provided senior-level support across 28 client environments, resolving infrastructure incidents while

maintaining high uptime and reducing repeat ticket occurrences.

• Designed and implemented standardized network layouts across multiple client sites, reducing

deployment time, improving consistency, and strengthening network security.

• Migrated 10+ file servers to SharePoint and OneDrive to reduce legacy server costs.

• Supported high-volume Active Directory and Microsoft 365 password resets, maintaining secure access

while minimizing impact to end users.

• Developed and managed Group Policy Objects to enforce security policies, support compliance

requirements, and maintain configuration consistency across endpoints and servers.

• Implemented automated patching and system maintenance scripts using Bash and Cron, ensuring

consistent compliance across Linux hosts.

System Administrator Consultant for Defiance College September 2020 – February 2022

MetaLink Technologies, Defiance, Ohio

• Standardized Linux security configurations across environments by enforcing least-privilege access,

firewall hardening, and regular vulnerability patching.

• Improved network performance and segmentation by managing switches, VLANs, and DHCP scopes to

support secure, scalable campus operations.

• Reduced organizational security risk by retiring end-of-life domain controllers and migrating Active

Directory infrastructure to Windows Server 2022.

• Enabled smooth technology transitions by supporting and training users on new platforms and process

improvements.

• Developed and maintained backup strategies for both Windows and Linux servers, ensuring data

integrity and rapid recovery during outages.

Network Support Specialist May 2018 – September 2020

• Guided customers through setup, configuration, and optimization of wireless equipment to ensure stable

and secure home networks.

• Assisted with firmware updates, network security settings, and troubleshooting interference issues to

improve performance and reliability.

Network Security Intern May 2018 – May 2019

Betco Corporation, Bowling Green, Ohio

• Assisted in migration from Microsoft Threat Management Gateway to Cisco ASA firewalls.

• Implemented centralized Graylog logging to detect security events and system failures that were

previously invisible.

EDUCATION

Bachelors of Science in Digital Forensics Graduated May 2019

Defiance College, Defiance, Ohio

CERTIFICATION

Digital Forensics Certified Associate, Digital Forensics Certification Board, 2019