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Senior IT Systems Administrator – Windows & VMware

Job in Miami, Miami-Dade County, Florida, 33101, USA
Listing for: Five Rivers IT, Inc.
Full Time position
Listed on 2026-07-24
Job specializations:
  • IT/Tech
    Systems Administrator, IT Infrastructure, Windows Server, Systems Engineer
Job Description & How to Apply Below

Senior IT Systems Administrator – Windows & VMware

We are seeking a dynamic Senior IT Systems Administrator with expertise in Windows and VMware technologies who can excel in both project leadership and operational excellence.

This role requires a strategic thinker who can drive complex infrastructure projects while maintaining operational stability across multiple datacenters, demonstrating strong organizational skills and effective communication throughout all initiatives.

Key Responsibilities

Windows Infrastructure Management

  • Design, implement, and maintain Windows Server environments (2019, 2022, 2025)
  • Oversee patch management, security hardening, and Gold Standard version compliance initiatives
  • Implement automation solutions using Power Shell and other scripting technologies
  • Monitor system performance and optimize resource utilization

VMware Infrastructure Management

  • Administer VMware vSphere v8+ environments including VxRail, vCenter, ESXi, and vSAN
  • Perform virtual machine lifecycle management, capacity planning, and optimization
  • Execute cluster upgrades and maintenance activities with minimal downtime

Project Leadership & Management

  • Lead end-to-end infrastructure projects including Windows Server upgrades, VMware upgrades, and system migrations across multiple datacenters
  • Develop comprehensive project schedules, timelines, and resource allocation plans
  • Provide regular status updates to stakeholders and executive leadership
  • Coordinate cross-functional teams and manage project dependencies
  • Ensure projects are delivered on time, within scope, and budget

Team Leadership & Task Management

  • Assign and prioritize tasks across team members based on skills and project requirements
  • Mentor junior administrators and provide technical guidance
  • Foster collaboration and knowledge sharing within the team
  • Act as escalation point for complex Windows and VMware technical issues

Operational Excellence

  • Maintain 24/7 system availability through proactive monitoring and maintenance
  • Develop and maintain standard operating procedures and documentation
  • Participate in on-call rotation for after-hours critical system support
  • Ensure compliance with security policies, change management, and regulatory requirements
  • Drive continuous improvement initiatives and best practices adoption

Required Qualifications

Technical Skills

  • 5+ years of hands-on experience with Windows Server administration
  • 5+ years of VMware vSphere administration experience
  • Proficiency in Power Shell scripting and automation
  • Experience with backup and disaster recovery solutions
  • Knowledge of storage technologies (SAN, NAS, local storage)
  • Familiarity with monitoring tools and performance optimization
  • Demonstrated experience following formal change management practices and procedures

Leadership & Communication

  • Proven track record of leading technical projects from inception to completion
  • Excellent written and verbal communication skills
  • Experience in task delegation and team coordination
  • Ability to translate technical concepts for non-technical stakeholders

Organizational Skills

  • Exceptional project management and organizational abilities
  • Experience with project management methodologies (Agile, ITIL preferred)
  • Proficiency in project management tools (Jira, Change Gear)
  • Strong analytical and problem-solving capabilities
  • Detail-oriented with ability to manage multiple priorities simultaneously

Preferred Qualifications

  • Bachelor's degree Information Technology, Computer Science, or related field
  • Microsoft certifications (MCSA, MCSE) or equivalent experience
  • VMware certifications (VCP, VCAP) or equivalent experience
  • Experience in regulated industries with compliance requirements
  • Familiarity with NERC CIP regulations and associated compliance obligations

Leadership Competencies

  • Strategic Thinking:
    Ability to align technical initiatives with business objectives
  • Team Development:
    Proven ability to mentor and develop technical talent
  • Change Management:
    Experience leading organizational and technical change initiatives
  • Risk Management:

    Capability to identify, assess, and mitigate technical risks
  • Stakeholder Management:
    Strong relationship-building skills across all organizational levels
Position Requirements
10+ Years work experience
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