JOHN MARTIN
SYSTEM ADMINISTRATOR
Holbrook,NY
Summary
Results-driven System Administrator with 10+ years of IT experience supporting enterprise infrastructure, Microsoft 365 environments, Windows Server systems, Active Directory, networking, cybersecurity, and disaster recovery solutions. Proven success managing multi-client environments within an MSP setting, deploying secure technology solutions, and maintaining high availability of critical business systems. Experienced in server administration, endpoint security, firewall management, Microsoft 365 administration, and troubleshooting complex infrastructure issues.
Overview
8
8
Certifications
20
20
years of professional experience
Work History
Information Technology Support Administrator
10.2020 - Current
- Administer Microsoft 365, Active Directory, Windows Server, DNS, and DHCP environments across multiple client organizations.
- Manage backup and disaster recovery solutions utilizing Datto BCDR and Cove Data Protection.
- Deploy and maintain cybersecurity platforms including SentinelOne, Huntress, and Zorus.
- Configure and support WatchGuard firewalls and Arista Edge Threat Management solutions.
- Provision user accounts, permissions, licensing, workstations, and security access for onboarding and offboarding.
- Troubleshoot infrastructure, networking, Microsoft 365, Citrix, Salesforce, Dentrix, Dexis, Carestream, and Epic application issues.
- Perform workstation deployments, server maintenance, endpoint management, and network troubleshooting for healthcare, legal, dental, and professional service organizations.
- Deliver Tier 1–3 support while maintaining exceptional customer satisfaction and service responsiveness.
IT Executive / Office Manager
Freedom Facility Maintenance
06.2019 - 03.2020
- Managed company technology infrastructure, network operations, and endpoint devices.
- Administered telecommunications systems, mobile workforce applications, and network resources.
- Installed and maintained Cat6 network cabling and connectivity throughout company facilities.
- Implemented security updates and technical safeguards to maintain network reliability and business continuity.
- Supported payroll systems, inventory management, website maintenance, and operational technology initiatives.
- Supervised daily operations and technology support for a team of 10–15 employees.
Technical Support Specialist / Office Supervisor
Binder & Binder Law Firm
10.2006 - 06.2019
- Installed, configured, maintained, and repaired computer hardware, software, printers, scanners, and peripherals.
- Provided technical support across multiple departments to minimize downtime and improve productivity.
- Assisted with software deployments, workstation setup, technology onboarding, and system maintenance.
- Trained employees on software applications, operational procedures, and technology best practices.
- Managed and supervised a team of 18 employees while maintaining departmental performance standards.
Education
Diploma - Computer Technician & Networking Specialist
Hunter Business School
Medford, NY01.2015
Skills
- Systems & Server Administration: Windows Server, Active Directory, Group Policy, DNS, DHCP, Microsoft 365, Exchange Online, Entra ID (Azure AD), User Provisioning, Remote Management
- Security & Backup: SentinelOne, Huntress, Zorus, WatchGuard Firewalls, Arista Edge Threat Management, Datto BCDR, Cove Data Protection, MFA, Endpoint Security
- Networking: TCP/IP, VPNs, Wireless Networking, Firewall Administration, Network Troubleshooting, Switches, Structured Cabling (Cat5e/Cat6)
Certification
CompTIA A+ CE
Timeline
Information Technology Support Administrator
10.2020 - Current
IT Executive / Office Manager
Freedom Facility Maintenance
06.2019 - 03.2020
Technical Support Specialist / Office Supervisor
Binder & Binder Law Firm
10.2006 - 06.2019
Diploma - Computer Technician & Networking Specialist
Hunter Business School