Sr. System Infrastructure Engineer

Overview

On Site
$60 - $70
Accepts corp to corp applications
Contract - Independent
Contract - W2
Contract - 12 Month(s)

Skills

Access Control
Active Directory
Ansible
Auditing
Backup
Bash
Capacity Management
CentOS
Cisco
Collaboration
Continuous Improvement
Cyber Security
DHCP
DNS
Data Storage
Disaster Recovery
Documentation
Dragon NaturallySpeaking
Dynatrace
Endpoint Protection
Firewall
Fortinet
Grafana
Group Policy
Hardening
High Availability
IT Infrastructure
IT Management
Leadership
Linux
Management
Mentorship
Optimization
Palo Alto
Microsoft Operating Systems
Regulatory Compliance
Root Cause Analysis
Scalability
Microsoft Windows Server
Network
Storage Management
System Administration
Network Operations
Red Hat Enterprise Linux
Scripting
SolarWinds
Splunk
Tier 3
Ubuntu
VMware
Windows PowerShell
VMware ESXi
VMware vSphere
Virtual Private Network
Virtualization

Job Details

Job Title: Senior System Administrator

Department: IT Infrastructure & Operations

PURPOSE

The Senior System Administrator is responsible for architecting, implementing, and maintaining the organization s enterprise systems and infrastructure to ensure optimal performance, scalability, and security. This role provides leadership across virtualization, systems, and storage management, supporting mission-critical workloads and driving modernization through automation, observability, and standardization. The Senior System Administrator serves as a senior technical escalation point, mentors junior team members, and ensures adherence to corporate cybersecurity and compliance standards.

ESSENTIAL FUNCTIONS

Infrastructure & Systems Management

  • Design, configure, and maintain VMware vSphere, ESXi, and vCenter environments.
  • Administer Windows Server (2016/2019/2022) and Linux (RHEL, Ubuntu, CentOS) systems, including patching, configuration, and security hardening.
  • Manage Active Directory, Group Policy, DNS, and DHCP for secure identity and network operations.
  • Implement and maintain Veeam Backup & Replication for enterprise-class backup and disaster recovery.
  • Support enterprise SAN/NAS storage systems, ensuring high availability and lifecycle optimization.

Network & Security

  • Configure and maintain firewalls, VPNs, and network appliances (Cisco, Fortinet, Palo Alto).
  • Work with the Cybersecurity team to ensure system patching, endpoint protection, and compliance with DMARC/SPF/DKIM standards.
  • Monitor system and network performance proactively and perform capacity planning.
  • Maintain strict system hardening, access control, and audit compliance.

Automation, Monitoring & Reliability

  • Develop automation scripts using PowerShell, Bash, or Ansible to streamline system operations.
  • Implement and maintain monitoring and observability tools such as SolarWinds, Dynatrace, Grafana, or Splunk.
  • Lead root cause analysis and implement preventive and corrective actions for high-impact incidents.
  • Participate in continuous improvement initiatives for infrastructure automation and operational resilience.

Leadership & Collaboration

  • Serve as Tier-3 escalation for complex infrastructure and system issues.
  • Collaborate with IT leadership to define infrastructure strategy, capacity planning, and modernization initiatives.
  • Mentor junior administrators and ensure operational standards and documentation are maintained.
  • Participate in on-call rotation and perform after-hours maintenance as required.

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