Sr Systems Administrator

Progressive IT; Denton (TX); Presencial; USD 83.000 - 131.000; Jornada completa

Descripción de la vacante

Progressive IT seeks an experienced Systems Administrator to manage enterprise Windows/Linux infrastructure, virtualization, security, and cloud services. You will troubleshoot complex issues, perform server patching and hardening, automate tasks with PowerShell, and support migrations and DR planning.

Responsibilities include managing AD/GP/DNS/DHCP, VMware or Hyper-V, CrowdStrike, and documenting system diagrams and SOPs.

Formación

• 7+ years of systems administration or infrastructure engineering experience.
• Advanced Windows Server administration: Active Directory, Group Policy, DNS, DHCP, and file services.
• VMware vSphere/ESXi or Hyper-V virtualization.
• Linux administration in mixed environments.
• TCP/IP, VLANs, firewalls, certificates; network troubleshooting.
• Server hardening, patch management, vulnerability remediation, privileged access, cybersecurity best practices.
• PowerShell scripting and automation.
• Infrastructure monitoring, alerting, capacity planning, performance troubleshooting, root cause analysis.
• Leading server migrations, infrastructure upgrades, and hardware refresh projects.
• Documentation: SOPs, diagrams, build standards, disaster recovery procedures.
• Strong communication and mentoring across networking, security, engineering, and business teams.

Responsabilidades

• Administer Windows Server environments, VMware virtualization, AD, GP, and DNS/DHCP.
• Deploy and manage CrowdStrike endpoint security agents.
• Patch, harden, remediate vulnerabilities and monitor performance.
• Troubleshoot infrastructure issues; perform root-cause analysis as escalation resource.
• Automate tasks with PowerShell and scripting tools.
• Support migrations, upgrades, storage, backup, and disaster recovery.
• Maintain technical docs and collaborate across teams.

Conocimientos

7+ years

Active Directory

Group Policy

DNS

DHCP

VMware vSphere/ESXi

Hyper-V

Linux administration

TCP/IP

VLANs

Firewalls

Certificates

PowerShell scripting

Automation

Monitoring & troubleshooting

Migrations & upgrades

Documentation

Mentoring

Educación

Bachelor's degree in IT or CS

Microsoft Windows Server Hybrid Administrator

Azure Administrator

VMware VCP

Red Hat RHCSA/RHCE

CompTIA Security+

Herramientas

CrowdStrike

PowerShell

Descripción del empleo

Job Type: Contract

Seeking an experienced Systems Administrator to manage and support enterprise Windows/Linux infrastructure, virtualization, security, and cloud services. This role involves troubleshooting complex issues, maintaining secure and reliable systems, and supporting infrastructure upgrades and automation initiatives.

Key Responsibilities

• Administer Windows Server environments, VMware virtual machines, Active Directory, Group Policy, and related services.

• Deploy and manage CrowdStrike endpoint security agents.

• Perform server patching, security hardening, vulnerability remediation, and performance monitoring.

• Troubleshoot infrastructure issues, conduct root cause analysis, and serve as a senior technical escalation resource.

• Automate administrative tasks using PowerShell and other scripting tools.

• Support infrastructure migrations, upgrades, storage, backup, and disaster recovery initiatives.

• Maintain technical documentation and collaborate with infrastructure and cybersecurity teams.

Required Skills & Experience

• 7+ years of systems administration or infrastructure engineering experience.

• Advanced Windows Server administration, including Active Directory, Group Policy, DNS, DHCP, and file services.

• Strong experience with VMware vSphere/ESXi or Hyper-V virtualization.

• Working knowledge of Linux administration in mixed environments.

• Understanding of TCP/IP, VLANs, firewalls, certificates, and network troubleshooting.

• Experience with server hardening, patch management, vulnerability remediation, privileged access, and cybersecurity best practices.

• Proficiency in PowerShell scripting and automation.

• Experience with infrastructure monitoring, alerting, capacity planning, performance troubleshooting, and root cause analysis.

• Experience leading server migrations, infrastructure upgrades, and hardware refresh projects.

• Ability to develop technical documentation, system diagrams, SOPs, build standards, and disaster recovery procedures.

• Strong communication, collaboration, and mentoring skills, including working with networking, security, engineering, and business teams.

Preferred Qualifications

• Bachelor's degree in IT, Computer Science, or a related field; equivalent experience considered.

• Certifications such as Microsoft Windows Server Hybrid Administrator, Azure Administrator, VMware VCP, Red Hat RHCSA/RHCE, or CompTIA Security+.

• Familiarity with ITIL, NIST, CIS, and CMMC frameworks.