| About the Role We are seeking an experienced Level 3 Network Engineer to join our IT Infrastructure team at our Central Islip office. In this role you will be responsible for managing designing implementing and troubleshooting complex network solutions with a focus on Cisco and Meraki technologies. You will act as the escalation point for Level 1 and 2 network support ensure high availability and performance of network infrastructure and participate in strategic network planning. Key Responsibilities - Serve as the subject matter expert (SME) for all Cisco and Meraki networking systems.
- Design configure and deploy enterprise-level LAN WAN and WLAN solutions.
- Monitor and optimize network performance using tools such as Cisco DNA Center Meraki Dashboard and SolarWinds.
- Respond to and resolve escalated network incidents and problems; lead root cause analysis.
- Maintain documentation for network architecture topologies and configurations.
- Collaborate with cross-functional teams on infrastructure projects and security initiatives.
- Assist in network upgrades migrations and expansion projects.
- Provide mentorship and technical guidance to junior network staff.
- Perform regular firmware upgrades patch management and compliance checks.
- Travel to remote offices and data centers for installations audits and troubleshooting (10 20%).
Required Qualifications - 5 years of hands-on experience in network engineering.
- Strong expertise in Cisco networking technologies (Catalyst ISR/ASR ASA/Firepower Nexus).
- In-depth experience with Cisco Meraki products (MX MR MS).
- Proven experience with Layer 2 and Layer 3 networking VLANs routing protocols (OSPF BGP EIGRP) VPNs NAT QoS.
- Solid understanding of network security principles and firewalls.
- Familiarity with cloud networking (Azure/AWS) and SD-WAN solutions is a plus.
- Strong analytical and troubleshooting skills.
Preferred Certifications - CCNP (Cisco Certified Network Professional) required.
- Meraki CMNA or ECMS certification is a plus.
- CCIE (optional but highly desirable).
Work Environment - This is a full-time onsite role in our Central Islip office.
- Some regional travel (10 20%) to support remote sites and projects.
- Flexible schedule and after-hours support may be required during critical deployments or outages.
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ATD Technology LLC is a certified minority woman owned business that creates opportunities to match qualified individuals with client programs while meeting all parties financial and technical goals. ATD is a full service provider with offerings in Contract Permanent and Temp-to-Perm staffing solutions. We serve Fortune 1000 mid cap and small cap companies in the Commercial Public and Government sectors.
About the Role We are seeking an experienced Level 3 Network Engineer to join our IT Infrastructure team at our Central Islip office. In this role you will be responsible for managing designing implementing and troubleshooting complex network solutions with a focus on Cisco and Meraki technologi...
| About the Role We are seeking an experienced Level 3 Network Engineer to join our IT Infrastructure team at our Central Islip office. In this role you will be responsible for managing designing implementing and troubleshooting complex network solutions with a focus on Cisco and Meraki technologies. You will act as the escalation point for Level 1 and 2 network support ensure high availability and performance of network infrastructure and participate in strategic network planning. Key Responsibilities - Serve as the subject matter expert (SME) for all Cisco and Meraki networking systems.
- Design configure and deploy enterprise-level LAN WAN and WLAN solutions.
- Monitor and optimize network performance using tools such as Cisco DNA Center Meraki Dashboard and SolarWinds.
- Respond to and resolve escalated network incidents and problems; lead root cause analysis.
- Maintain documentation for network architecture topologies and configurations.
- Collaborate with cross-functional teams on infrastructure projects and security initiatives.
- Assist in network upgrades migrations and expansion projects.
- Provide mentorship and technical guidance to junior network staff.
- Perform regular firmware upgrades patch management and compliance checks.
- Travel to remote offices and data centers for installations audits and troubleshooting (10 20%).
Required Qualifications - 5 years of hands-on experience in network engineering.
- Strong expertise in Cisco networking technologies (Catalyst ISR/ASR ASA/Firepower Nexus).
- In-depth experience with Cisco Meraki products (MX MR MS).
- Proven experience with Layer 2 and Layer 3 networking VLANs routing protocols (OSPF BGP EIGRP) VPNs NAT QoS.
- Solid understanding of network security principles and firewalls.
- Familiarity with cloud networking (Azure/AWS) and SD-WAN solutions is a plus.
- Strong analytical and troubleshooting skills.
Preferred Certifications - CCNP (Cisco Certified Network Professional) required.
- Meraki CMNA or ECMS certification is a plus.
- CCIE (optional but highly desirable).
Work Environment - This is a full-time onsite role in our Central Islip office.
- Some regional travel (10 20%) to support remote sites and projects.
- Flexible schedule and after-hours support may be required during critical deployments or outages.
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ATD Technology LLC is a certified minority woman owned business that creates opportunities to match qualified individuals with client programs while meeting all parties financial and technical goals. ATD is a full service provider with offerings in Contract Permanent and Temp-to-Perm staffing solutions. We serve Fortune 1000 mid cap and small cap companies in the Commercial Public and Government sectors.
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Job Location:
Monthly Salary:
Not Disclosed
Posted on:
24-09-2025
Vacancies:
1 Vacancy
