Senior IT Infrastructure & Security Administrator

IT Resources; Venice (FL); On-site; USD 90,000 - 130,000; Full time

Job summary

IT Resources is seeking a Senior Systems Administrator to design, implement, and optimize the organization’s IT infrastructure across Windows, Linux, and VMware environments. You will ensure availability, security, and performance of systems, networks, and storage while supporting end users and enforcing policy.

Responsibilities include disaster recovery, patch management, and implementing automation to improve operations. Excellent communication and documentation skills are essential.

Qualifications

• 7+ years as a Systems Administrator in Windows, Linux, and VMware environments.
• Experience with enterprise infrastructure, networking, virtualization, and security best practices.
• Ability to diagnose and resolve complex technical issues quickly.
• Strong communication for technical and non-technical audiences.
• Excellent documentation, organizational and analytical skills.
• Commitment to customer service and end-user support.

Responsibilities

• Ensure critical business systems are available, secure, and perform optimally during business hours.
• Administer Windows desktops/servers, printers, and data center infrastructure.
• Manage storage, switches, firewalls, and power infrastructure.
• Configure and troubleshoot enterprise networking (Cisco Meraki, etc.).
• Maintain network segmentation (Illumio) and perimeter security (SonicWall, Cloudflare).
• Implement security controls and IAM (AD, GPOs, MFA: DUO/Twilio).
• Oversee backup, disaster recovery (Veeam HA), and business continuity (StoneFly).
• Asset & patch management (NinjaOne) and automation initiatives.
• Provide advanced end-user support and track incidents and requests.

Skills

Windows

Linux

VMware

Networking

Security best practices

Documentation

End-user support

Communication

Tools

NinjaOne

Veeam

StoneFly

Illio

CrowdStrike

BitLocker

MFA (DUO/Twilio)

Active Directory

Proofpoint

SonicWall

Cisco Meraki

Cloudflare

Job description

IT Resources is seeking a Senior Systems Administrator to design, implement, and optimize the organization’s IT infrastructure across Windows, Linux, and VMware environments. You will ensure availability, security, and performance of systems, networks, and storage while supporting end users and enforcing policy.

Responsibilities include disaster recovery, patch management, and implementing automation to improve operations. Excellent communication and documentation skills are essential.