System Administrator Network Support

Jason Hefley

Tulsa, OK • 918-***-**** • *******@*******.***

System Administrator

With over 25 years of experience, I am a seasoned System Administrator proficient in Microsoft and Linux server administration. I have spearheaded network support in a large WAN environment, ensuring optimal functionality across 30+ locations. My expertise includes system performance management, security protocol implementation, and automation of routine tasks.

WORK EXPERIENCE

Berendsen Fluid Power 11/1998 – 9/2025

Senior System Administrator Tulsa, OK

•Delivered 24/7 network support for 400+ users across 30 locations, enhancing operational efficiency through proactive monitoring and rapid issue resolution.

•Spearheaded Microsoft and Linux server administration in a Hyper-V environment, ensuring over 99% uptime and seamless operations. Windows Server 2019 and 2022 environment utilizing Dell PowerEdge hardware. Primarily Red Hat Linux.

•Led the configuration and management of on-premise Exchange 2016, ensuring seamless email communication and data integrity across the organization.

•Migrated physical servers to a virtual environment, reducing on-premise hardware by 80% within 6 months, enhancing resource efficiency and scalability. Managed upwards of 20 physical and 50 virtual servers.

•Implemented, developed and tested installation and update of file servers, print servers and application servers.

•Active directory configuration and management. Creation of user accounts, security groups, GPO’s, OU’s, permissions, and PowerShell scripting. AD replication across multiple domains. DNS, DHCP, WINS configuration and management.

•File Server RAID configurations, permissions, shares, and quotas.

•Enhanced organizational security posture by integrating DUO MFA, fostering a culture of security awareness and reducing risk exposure.

•IIS and SQL Server configuration, maintenance, and troubleshooting.

•Responsible for comprehensive documentation for ticketing and task databases, enhancing team efficiency and knowledge sharing.

•Enhanced data recovery capabilities by developing and testing a comprehensive backup strategy and disaster recovery plan, ensuring swift restoration and minimal downtime for critical systems. Very proficient with Veeam Backup and Replication.

•Reduced downtime by proactively identifying and resolving potential issues through thorough system monitoring tools.

•Maximized system availability through development and testing of contingency plans.

•Managed system performance and uptime, ensuring optimal functionality across all platforms.

•Maintained flexible schedule and responded to after-hours and weekend emergencies.

•Led troubleshooting efforts for complex technical issues, providing timely resolutions to minimize downtime.

•Evaluated new technologies to recommend enhancements that align with organizational goals and needs.

•Simplified troubleshooting processes by creating detailed documentation for system configurations, procedures, and best practices.

•Provisioned new software and hardware for use, following established security policies.

•Managed user access rights to maintain a high level of information security while ensuring appropriate levels of accessibility for authorized personnel.

•Scanned for and installed important security and functionality patches to maintain optimal protections against intrusion and system reliability.

•Planned and implemented upgrades to system hardware and software.

•Enabled smooth transitions during hardware and software upgrades, minimizing disruptions to end users.

•Diagnosed and resolved complex technical issues through in-depth analysis, facilitating uninterrupted business operations.

•Enhanced system performance by optimizing server configurations and implementing regular updates.

•Ensured high availability of critical systems by setting up and monitoring failover mechanisms and redundancy protocols.

Business Computer Center

08/1997 - 11/1998

IT Field Tech

Field Technician supporting contracted companies in need of IT support.

Kaiser-Francis Oil Company

Tulsa, OK

IT Support

Assisted with Windows 95 hardware/software rollout.

EDUCATION

BBA in Marketing

04/1997 – 8/1997

Tulsa, OK

Oklahoma State University

Stillwater, OK • 05/1996

Minor Management Information System

SKILLS

Ability to prioritize and execute multiple tasks and projects simultaneously with high degrees of efficiency.

Ability to work both independently and as part of a team.

Advanced knowledge of Microsoft Server Operating systems.

Critical thinking.

Excellent written and verbal communication skills.

Exceptional organizational skills.

High level of professionalism and integrity.

Proven experience in configuring, administering, and managing Hyper-V environments.

Duo MFA administration.

Forta Email Security Gateway.

Barracuda Message Archiver

Barracuda Email Security Gateway

System maintenance and upgrades.

System performance analysis.

Troubleshooting and support services. Work with 3rd party support.

SQL administration.

Expert with Dell server hardware.

Veeam backup and replication expertise.

Contact this candidate