Sr IT Systems Admin – Win / VMWare

Delan Associates, Inc; Miami (FL); On-site; USD 110,000 - 150,000; Full time

Job summary

Delan Associates, Inc. seeks a Senior IT Systems Administrator focused on Windows and VMware to lead complex infrastructure initiatives across multiple datacenters in the Miami area. You will steer projects, mentor engineers, and ensure 24/7 availability with strong security and change-management discipline.

The role blends hands-on administration with strategic leadership, requiring excellent communication and cross-team collaboration to deliver on time and within budget.

Qualifications

• 5+ years of hands-on Windows Server administration.
• 5+ years of VMware vSphere administration experience.
• Proficiency in PowerShell 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.
• Experience following formal change management practices.

Responsibilities

• Lead end-to-end infrastructure projects including Windows Server upgrades and VMware upgrades.
• Develop comprehensive project schedules, timelines, and resource 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.
• Mentor junior administrators and provide technical guidance.
• Maintain 24/7 system availability through proactive monitoring and maintenance.
• Develop and maintain standard operating procedures and documentation.

Skills

Windows Server administration

VMware vSphere administration

PowerShell scripting

Automation

Monitoring tools

Change management

Leadership

Communication

Project coordination

Education

Bachelor's degree in Information Technology or related field

Tools

VxRail

vCenter

ESXi

SAN/NAS storage

Jira

Change Gear

Job description

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 PowerShell 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 PowerShell 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