Sr. Systems Administrator Job at Tax Advisors Group (Dallas)

Job Description

The Sr. Systems Administrator is responsible for the secure, reliable operation of the firm’s endpoint, cloud, identity, and network environments. This role ensures systems supporting sensitive financial and client tax data meet security, compliance, and availability requirements while enabling a productive end‑user experience. The Sr. Systems Administrator partners across the organization, serves as a technical escalation point, and continuously improves system resilience and security posture.

Job Responsibility

Deploys, manages, and monitors endpoint security solutions, including EDR, antivirus, and mobile device protections across all company‑managed devices
Performs regular vulnerability assessments, coordinates OS and third‑party software patching, and remediates identified security risks
Ensures systems and configurations comply with applicable industry standards and frameworks (e.g., NIST, SOC 2) related to the handling of sensitive financial and client tax data
Administers identity and access management within Azure Active Directory (Entra ID), including user lifecycle management, groups, service principals, enterprise applications, and privileged access
Implements and maintains identity security controls such as Multi‑Factor Authentication (MFA), Conditional Access policies, and Privileged Identity Management (PIM)
Administers Microsoft 365 services including Exchange Online, SharePoint, and Teams, ensuring reliable collaboration and communication services
Manages mail flow rules, threat protection (Microsoft Defender for Office 365), and Data Loss Prevention (DLP) policies
Monitors Azure resources and enforces governance standards to reduce configuration drift, support cost optimization, and maintain operational consistency
Configures, maintains, and secures network infrastructure, including firewalls, switches, wireless access points, and VPN connectivity for remote offices and hybrid users
Monitors network performance and availability, performs root‑cause analysis, and resolves issues to support high uptime and reliability
Creates, maintains, and updates standardized workstation images and supports modern, zero‑touch device provisioning through Microsoft Intune and Windows Autopilot
Manages the full lifecycle of end‑user hardware, including procurement, asset tracking, refresh planning, and secure decommissioning
Ensures consistent software configurations across all endpoints, including required business applications and tax‑related tools
Designs, implements, and periodically tests backup and disaster recovery procedures for critical systems and business data
Serves as the escalation point for complex technical issues beyond help desk scope, providing root‑cause resolution and guidance
Acts as the primary technical contact for ISPs, hardware vendors, and third‑party software providers
Proactively identifies and implements improvements to system reliability, security posture, and operational efficiency

Requirements

5+ years of experience in systems administration, infrastructure support, or IT operations
Strong experience administering Windows environments, Microsoft 365, and Azure AD (Entra ID)
Hands‑on experience with endpoint security, vulnerability management, and patching practices
Working knowledge of network infrastructure, firewalls, VPN technologies, and cloud governance
Experience supporting environments that process sensitive or regulated data
Proven ability to troubleshoot and resolve complex technical issues independently
Strong communication, collaboration, and stakeholder‑management skills
Applicants must reside in the DFW metroplex

Nice to have

Experience supporting SOC 2, NIST, or similar compliance frameworks
Familiarity with Microsoft Defender, Intune, and Windows Autopilot
Experience in professional services, financial services, or tax‑related environments
Relevant technical certifications (Microsoft, Azure, Security+, Cisco, or similar)

What we offer

Competitive salary, with incentivized earning potential
401(k) matching plan
Medical/Dental/Vision Plan
Paid time off and standard Winter Break company closure
Regular Company Social Events
Hybrid Work Schedule

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Sr. Systems Administrator

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