IT Infrastructure Specialist

Salary: $81,924.00 - $115,524.00 Annually
Location : City of Irving, TX
Job Type: Professional
Job Number: 2600180
Department: Information Technology
Opening Date: 06/04/2026
Closing Date: 6/17/2026 5:00 PM Central


Job Posting
Duties include administering and securing the City's email and messaging infrastructure across on-premises and cloud platforms; managing public DNS records, external domain configurations, and SSL/TLS certificates to ensure secure, trusted access to internet-facing services; and supporting email authentication and fraud prevention through SPF, DKIM, and DMARC. The position administers core security platforms-including endpoint detection and response, ransomware protection, and email security awareness tools-and monitors and responds to alerts from the City's Managed Security Operations Center (SOC) partner, performing triage, coordinating remediation with internal teams, and helping protect critical infrastructure. Additional duties include assisting in the design, implementation, and management of network infrastructure such as routers, switches, firewalls, and wireless networks; administering physical and virtual servers and the operating systems and software they host; enforcing security measures that protect the City's IT infrastructure against unauthorized access, data breaches, and other threats; collaborating across IT Department divisions to develop and test disaster recovery and business continuity strategies; and coordinating with vendors and third-party providers for hardware and software procurement, support, and maintenance. A Bachelor's degree, or equivalent, in computer science, information technology, or a closely related field and two years of experience are required. Certifications such as CompTIA Security+, CompTIA Network+, CCNA, or Microsoft security/identity certifications (e.g., SC-200, SC-300, AZ-500) are highly desirable. Familiarity with cloud computing concepts and platforms (e.g., Microsoft Azure) is a plus. This position requires access to criminal justice information; the selected candidate will be subject to a CJIS criminal history check and must not have any criminal conviction above the grade of a Class B misdemeanor or any Class B misdemeanor within the past 10 years; other convictions may also be considered. CJIS Security Awareness Training must also be completed upon hire. A résumé must be submitted with the application.

PAY GRADE IT24 / FULL PAY RANGE $6,827 - $9,627 PER MONTH

Full Job Description
The full job description for this position and all other City of Irving job classifications are available online. to access the list of job titles.

Culture


The Information Technology Department is responsible for the administration and maintenance of all the City of Irving's technology, including servers, computer hardware, mobile devices and phone systems. We use tried and tested technologies to exceed the service expectations of our customers (citizens, businesses and visitors) and improve the efficiency and transparency of our operations.
The City of Irving strives to be the most inclusive, welcoming, respectful and understanding municipal organization in North Texas. Irving is home to one of the most diverse ZIP codes in the nation, with many religions, races, nationalities and beliefs represented. The city acknowledges that its employees' diversity make them uniquely qualified to serve. This is achieved by building and nurturing an employment base that better reflects the races, cultures, faiths, gender identities, generations and philosophies of the community. The goal is to create programming and engagement opportunities, implement best and emerging practices, and foster an environment of understanding and respect. This allows for equitable access to programs and services, removal of barriers for engagement, and a culture of safety, trust and belonging.

For full-time employees, the City of Irving offers competitive health benefits and also participates in TMRS. More information can be found online at
01


IT Certifications - Do you have any of the following certifications? Please check all that apply.

• CompTIA Security+
• CompTIA Network+
• CCNA
• Microsoft security/identity certification (SC-200, SC-300, or AZ-500)
• None

02


IT Experience - How many years of experience do you have in the Information Technology field?

• 1 to 2 years
• 3 to 4 years
• 5 or more years
• None

03


IT - Please describe your experience securing and maintaining IT infrastructure, including any work with email/messaging security, endpoint or SOC alert monitoring, DNS/certificate management, or cloud platforms such as Microsoft Azure.
Required Question