System Administrator III

ADP, Inc.; Dallas (TX); On-site; USD 95,000 - 125,000; Full time

Job summary

Precinmac in Dallas, TX is seeking an experienced Systems Administrator III to manage, secure, and optimize enterprise infrastructure on Windows and Linux systems. You will lead complex projects, coordinate with cross‑functional teams, and provide Tier III support for escalated incidents.

The role requires 7+ years of hands-on experience, relevant certifications, and up to 20% travel. Expect involvement with AD, DNS, DHCP, virtualization, cloud platforms, and strong documentation practices.

Qualifications

• 7+ years of hands-on experience as a system administrator or similar role.
• Certifications such as MCSA/MCSE, Azure, AWS, VMware are preferred.
• Ability to travel up to 20% for project work.

Responsibilities

• Administer, maintain, and optimize Windows and/or Linux server environments.
• Manage AD, DNS, DHCP, GPO, IAM, and directory synchronization.
• Oversee storage, virtualization (VMware/Hyper-V), and backup/DR.
• Implement security standards, patching, hardening, and monitoring.
• Provide Tier III incident and problem resolution for escalated issues.
• Lead upgrades, migrations, and infrastructure projects.
• Manage cloud environments such as Microsoft 365, Azure, or AWS.
• Develop documentation, runbooks, and SOPs.
• Collaborate with Networking, Security, Helpdesk, and App Support.
• Perform capacity planning and system improvement recommendations.

Skills

Windows Server

Linux

PowerShell

VMware

Hyper-V

Active Directory

Azure/AWS

Networking basics

Documentation

Education

Certifications preferred: MCSA/MCSE, Azure Administrator, AWS SysOps, VMware VCP, CompTIA Security+

Tools

Intune

SCCM

Jamf

Azure

AWS

Job description

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

System Administrator III

Full Time Dallas, TX, US

2 days ago Requisition ID: 2654

Job Summary:

• Working under limited supervision,the IT System Administrator III is a senior‑level technical role responsible for managing, optimizing, and securing the organization’s infrastructure. This position provides advanced support, leads system implementations, and acts as an escalation point for complex issues across servers, networks, applications, and cloud environments.
• To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Responsibilities:

• Administer, maintain, and optimize Windows and/or Linux server environments
• Manage infrastructure services including Active Directory, DNS, DHCP, Group Policy, identity and access management, and directory synchronization
• Oversee enterprise storage, virtualization platforms (VMware/Hyper‑V), and backup/DR solutions
• Implement and maintain security standards, patching, hardening, and monitoring across all systems
• Provide Tier III incident and problem resolution for escalated infrastructure issues
• Lead system upgrades, migrations, integrations, and infrastructure projects
• Manage cloud environments such as Microsoft 365, Azure, or AWS
• Develop and maintain technical documentation, diagrams, SOPs, and runbooks
• Collaborate with cross‑functional teams including Networking, Security, Helpdesk, and Application Support
• Perform capacity planning and make recommendations for system improvements

Required Education & Experience:

• 7+ years of hands‑on experience as a system administrator or similar role, required
• Relevant certifications preferred (e.g., MCSA/MCSE, Azure Administrator, AWS SysOps, VMware VCP, CompTIA Security+)
• Ability to travel (20%)

Desired Proven Attributes:

• Advanced knowledge of Windows Server and/or Linux systems
• Strong experience with virtualization (VMware, Hyper‑V)
• Familiarity with cloud platforms (Azure, AWS, Microsoft 365)
• Experience with PowerShell or similar automation/scripting tools
• Strong understanding of networking fundamentals (TCP/IP, routing, firewalls, VLANs)
• Experience with endpoint management platforms (Intune, SCCM, Jamf, etc.)
• Knowledge of security best practices, compliance standards, and threat mitigation
• Excellent troubleshooting, documentation, and communication skills
• Strong analytical and problem‑solving abilities
• Ability to work independently and lead technical initiatives
• Effective communication with both technical and non‑technical stakeholders
• High attention to detail and commitment to system reliability and security
• Collaboration, Trust & Engagement: Builds strong working relationships with Networking, Security, Helpdesk, and Application Support teams; communicates clearly during migrations, upgrades, and Tier III incidents so cross‑functional partners stay informed; earns trust as the go‑to escalation point for complex infrastructure issues.
• Customer Focus & Impact: Understands how server, identity, storage, and cloud reliability affect end users and business units; resolves Tier III incidents and problems in ways that minimize disruption and rebuild confidence in IT; delivers infrastructure projects and migrations that create lasting value rather than short‑term fixes.
• Results & Accountable: Takes ownership of enterprise infrastructure (AD, DNS, DHCP, GPO, storage, virtualization, backup/DR) with a bias toward action; drives patching, hardening, and monitoring on schedule; leads upgrades and migrations to completion and holds self accountable for system stability and security posture.
• Business & Financial Insights: Applies sound judgment to capacity planning, licensing (e.g., M365, Azure, AWS), and infrastructure investment recommendations; balances cost, performance, and risk when proposing system or platform improvements; understands the business impact of downtime, security gaps, or under‑provisioned capacity.
• Innovation & Courage: Proactively identifies opportunities to modernize, automate, or consolidate infrastructure while operating within ITAR and export‑control boundaries (e.g., data segregation, access restrictions on regulated systems); has the courage to enforce compliance‑driven security standards even when they slow down convenience or push back on non‑compliant requests; challenges outdated configurations or manual processes, and adapts confidently as environments evolve toward hybrid/cloud models without compromising controlled‑technical‑data safeguards; documents changes clearly (SOPs, runbooks, diagrams) to keep improvements sustainable and audit‑ready.

Physical Requirements:

• Prolonged periods sitting at a desk while working on a computer
• Ability to lift up to 15 pounds as required
• Must be able to quickly navigate manufacturing areas
• Ability to stand, bend, crawl, stretch, lay, and squat for equipment maintenance

For information on Precinmac, including more information on employee benefits and our company culture, visit our website at www.precinmac.com

Precinmac is an equal opportunity, affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

This role requires access to U.S. export‑controlled information. Therefore, employment will be contingent upon the ability to prove that you meet the status of a U.S. Person as one of the following: U.S. lawful permanent resident, U.S. Citizen, have been granted asylee or refugee status (i.e., a protected individual under the Immigration and Naturalization Act, 8 U.S.C. 1324b(a)(3)).