Certified Network Administrator (LAN/WAN)

City of New York; New York (NY); On-site; USD 99,000 - 134,000; Full time

Job summary

The City of New York's Department of Design and Construction, Technology & Innovation Division, seeks a Certified Network Administrator (LAN/WAN) to design, administer, and secure the agency’s network infrastructure across multiple sites. You will ensure high availability, performance, and resilience while leading IT projects that support modernization initiatives.

The role requires deep technical expertise in network infrastructure and cybersecurity, with a proactive approach to threat

Qualifications

• A baccalaureate degree or equivalent with 2+ years of LAN/WAN experience.
• Four-year high school diploma with 6+ years of relevant IT experience; at least 2 years in LAN/WAN.
• Equivalency options apply per NYC rules; education/experience substitutions allowed.

Responsibilities

• Design, install, configure, and maintain network infrastructure (routers, switches, firewalls, SAN/NAS, Wi-Fi).
• Monitor performance and implement improvements for reliability and efficiency.
• Troubleshoot outages and connectivity issues promptly.
• Maintain Active Directory, TCP/IP, DNS, DHCP, VLANs, and virtualization/backups.

Skills

Network administration

Security mindset

PowerShell scripting

Project management

Threat mitigation

Education

Baccalaureate degree

High school diploma

Equivalent experience

Tools

Active Directory

VPN

IDS/IPS

PowerShell

Imaging tools

Job description

Hours: Full-Time Position – 35 Hours

Work Location: 30-30 Thomson Avenue, LIC, NY 11101

Only candidates who are permanent in the Certified IT Administrator (LAN/WAN) title, reachable on the Open-Competitive List (Exam #1111) may apply. Please include a copy of your Notice of Results card, Receipt of Filing or indicate if you are already permanent.

The New York City Department of Design and Construction, Technology & Innovation Division, is seeking an experienced and security-minded Certified Network Administrator (LAN/WAN) to manage and secure the agency’s network infrastructure. This role is responsible for the design, administration, and continuous improvement of DDC’s local and wide area networks, ensuring high availability, performance, and resilience across all systems and sites. The ideal candidate brings deep technical expertise in network infrastructure and cybersecurity, a proactive approach to threat mitigation, and the ability to lead IT projects that support agency-wide operations and modernization initiatives.

The Responsibilities Include

• Design, install, configure, and maintain network infrastructure, including routers, switches, firewalls, SAN/NAS, and wireless access points.


• Monitor network performance and implement improvements to optimize reliability and efficiency; perform regular maintenance and firmware updates.


• Troubleshoot and resolve network issues, outages, and connectivity problems in a timely manner.


• Maintain strong working knowledge of Active Directory, TCP/IP, DNS, DHCP, VLANs, virtual machine systems, backups, and deployment/imaging tools.


• Implement and enforce network security policies, including access controls, threat mitigation, and configuration of enterprise firewalls, VPNs, and Intrusion Detection/Prevention Systems (IDS/IPS).


• Conduct regular vulnerability assessments and coordinate remediation efforts to harden the network perimeter.


• Support Single Sign-On (SSO) and Multi-Factor Authentication (MFA) across agency platforms.


• Monitor security logs for suspicious activity and lead incident response efforts when necessary.


• Manage and automate administrative tasks using PowerShell or similar scripting tools to improve operational efficiency.


• Coordinate network changes, upgrades, and maintenance with internal teams and external vendors.


• Lead technical projects including office setups/relocations, hardware refreshes, and implementation of cloud-based solutions.


• Develop internal communications to promote staff awareness of phishing threats and data hygiene best practices.


• Maintain comprehensive documentation of network architecture, configurations, security protocols, and incident logs.


• Ensure compliance with agency IT policies, security standards, and governance requirements.


• Provide technical support and guidance to staff on network-related issues; available for on-call or after-hours support as required.

Please note: All candidates must be currently authorized to work full-time in the United States (U.S.). In compliance with Public Law 99-603, candidates are required to present original documents proving citizenship or the legal right to work in the U.S. DDC is unable to support or sponsor any visa application or visa extension, including but not limited to OPT/STEM visas, H‑1B visas, F‑1 practical training, permanent residence sponsorship, or any proposed change of visa type. DDC does not offer a training program as required by U.S. immigration law and is not hiring temporary employees. Candidates must have proper work authorization when an employment offer is made.

Additionally, educational credentials must be from a U.S. Department of Education‑recognized accredited institution. Credentials from foreign institutions require independent equivalency verification from an approved evaluation service. A list of providers (fees apply) is available at: https://www.nyc.gov/assets/dcas/downloads/pdf/employment/nyc-dcas-foreign-education-evaluation-guide.pdf.

CERTIFIED IT ADMINISTRATOR (LA - 13652)

Minimum Qualifications

• A baccalaureate degree from an accredited college, and two years of satisfactory full-time (not classroom based) experience in local area network and/or wide area network planning, design, configuration, installation, implementation, troubleshooting, integration, performance monitoring, maintenance, enhancement, and security management; or


• A four‑year high school diploma or its educational equivalent and six years of satisfactory full‑time (not classroom based) information technology experience of which at least 2 years must have been as described in "1" or


• A satisfactory equivalent of education and/or experience equivalent to "1" or "2" above. Education may be substituted for experience on the basis that 30 undergraduate semester credits from an accredited college is equivalent to 6 months of experience. A master’s degree in computer science or a related field from an accredited college may be substitute for one year of experience. However, all candidates must have at least one year of satisfactory (not classroom based) full‑time information technology experience as described in "1" above.

Note: In addition to meeting the minimum Qualification Requirements: Incumbents may be required to update existing and/or obtain additional professional industry‑standard certification(s) for current and future technical environments(s) in which they may be assigned to work, as determined by the employing agency.

Preferred Skills

• Strong knowledge of network administration, infrastructure, and protocols (TCP/IP, VPN, DNS, DHCP, VLAN).


• Experience configuring and managing routers, switches, firewalls, wireless networks, and network monitoring tools.


• Familiarity with enterprise security tools including IDS/IPS, SSO, MFA, and vulnerability assessment platforms.


• Proficiency with PowerShell or similar scripting languages for task automation.


• A “security‑first” mindset applied to all architectural and administrative decisions.


• Strong troubleshooting, analytical, and problem‑solving skills.


• Excellent written and verbal communication skills, with the ability to translate technical concepts for non‑technical staff.


• Proven ability to manage multiple projects and meet strict deadlines.


• Experience in government or large enterprise IT environments preferred.

55a Program

This position is also open to qualified persons with a disability who are eligible for the 55‑a Program. Please indicate at the top of your resume and cover letter that you would like to be considered for the position through the 55‑a Program.

Public Service Loan Forgiveness

As a prospective employee of the City of New York, you may be eligible for federal loan forgiveness programs and state repayment assistance programs. For more information, please visit the U.S. Department of Education’s website at https://studentaid.gov/pslf/.

Residency Requirement

New York City Residency is not required for this position.

Additional Information

The City of New York is an inclusive equal opportunity employer committed to recruiting and retaining a diverse workforce and providing a work environment that is free from discrimination and harassment based upon any legally protected status or protected characteristic, including but not limited to an individual's sex, race, color, ethnicity, national origin, age, religion, disability, sexual orientation, veteran status, gender identity, or pregnancy.

, $99,209.00 – $133,648.00