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Position Description Position Overview: Under general supervision, the Enterprise System Administrator is responsible for installing configuring and maintaining enterprise applications such as email, active directory, and other collaborative technologies in accordance with established IT policies and procedures. Requires a thorough understanding of Active Directory including forest and trust concepts. Works with latest Microsoft technologies including O365, Skype for Business, Exchange Online, federation services, and MDM platforms.

Understands and can troubleshoot and diagnose DNS and hierarchical based systems. Works well in a team environment and communicates effectively with peers and customers. The Enterprise System Administrator will work in a team environment overseeing Infrastructure Applications and Services, including: Installing, configuring, and maintaining enterprise applications and complex identity services, including multi-forest Active Directory environments, cross-forest trusts, child domains, GPOs, and Entra ID.

Managing enterprise messaging, edge security, and collaboration platforms, specifically Cisco IronPort (Secure Email Gateway), Exchange Server Subscription Edition (SE) On-Premises, Exchange 365 / Exchange Online hybrid environments, and Microsoft Teams. Overseeing inbound and outbound mail flow security, including Cisco IronPort policy controls, content filters, blocklists, and messaging coexistence/synchronization across hybrid cloud and cross-domain boundaries. Automating system administration and infrastructure tasks across multiple domains using advanced scripting (e.g., PowerShell, Python) to streamline server deployment, bulk object lifecycle management, and metadata cleanup

Overseeing core infrastructure services (DNS, DHCP, PKI) and the lifecycle management of enterprise servers in a distributed network architecture. Designing, testing, and maintaining disaster recovery, backup solutions, and high-availability server clusters. Monitoring system performance and capacity needs for all supported applications, databases, and core collaboration/gateway infrastructure.

Coordinating with customers and departmental users across different domains to troubleshoot complex mail flow and cross-boundary issues, providing high-level ticket support, and driving problem resolution. Maintaining server and application documentation. Collaborating with Cybersecurity, Desktop Endpoint, and compliance teams to ensure appropriate patch management, gateway security baselines, and cross-forest access-control alignment.

Performing other duties as assigned by the department. Harris County is an Equal Opportunity Employer https://hrrm.harriscountytx.gov/Pages/EqualEmploymentOpportunityPlan.aspx If you need special services or accommodations, please call (713) 274-5445 or email ADACoordinator@bmd.hctx.net. This position is subject to a criminal history check

Only relevant convictions will be considered and, even when considered, may not automatically disqualify the candidate. Requirements Education: Bachelor's degree in an IT-related field plus 4 years of progressive enterprise systems administration experience OR High School diploma/GED plus 8 years of progressive enterprise systems administration experience Experience: Five (5) years of IT work experience supporting servers and software applications and problem solving/troubleshooting. Proven advanced experience supporting servers and enterprise applications (including O365, Exchange, and Active Directory) in a large enterprise, advanced experience supporting Microsoft productivity applications.

Knowledge, Skills & Abilities (KSAs): Exceptional technical troubleshooting skills. Advanced experience supporting PC operating system and hardware. Excellent interpersonal and written/oral communication skills.

The ability to interact with staff at all levels, including VIPs. The ability to work independently with a high level of productivity and accuracy. Ability to work extended hours occasionally on special projects or emergency activations.

MUST have exceptional customer service skills. Ability to identify and troubleshoot complicated issues. Applicants for this position will be subject to a criminal background check that includes being fingerprinted.

This applies to any position with network access to Criminal Justice Information Services (CJIS) or access to an area where CJIS is received, maintained or stored either manually or electronically (i.e. custodian, maintenance). Automatic Disqualification: Convictions, probation, or deferred adjudication for any Felony, and any Class A Misdemeanor Convictions, probation, or deferred adjudication for a Class B Misdemeanor, if within the previous 10 years Open arrest for any criminal offense (Felony or Misdemeanor) Family Violence conviction NOTE: Qualifying education, experience, knowledge and skills must be documented on your job application

You may attach a resume to the application as supporting documentation but ONLY information stated on the application will be used for consideration. "See Resume" will not be accepted for qualifications. Preferences Education: Advanced degree or certifications Experience: Five (5) years of experience managing Active Directory and DNS systems.

Knowledge of ITIL, change management, active directory and group policy concepts is a plus. Knowledge, Skill & Abilities (KSAs): Certifications including Azure experience. General Information Work Schedule: Mon.

- Fri., 40Hrs Hybrid Schedule: Minimum 2 Days In-Office (Non- Negotiable) May be required to work more than forty hours during the workweek and/or weekends or on-call 24 hours a day to meet special projects or deadlines Subject to performing other duties as assigned Location: 406 Caroline St., Houston, Tx. 77002 Must live or plan to live in the Houston Texas metropolitan area Salary: Depends on Qualifications. Based on 26-Pay Periods Due to a high volume of applications positions may close prior to the advertised closing date

Employment may be contingent on passing a drug screen and meeting other standards. Due to a high volume of applications positions may close prior to the advertised closing date or at the discretion of the Hiring Department.