Senior Network & Security Engineer Location: New York Tri-State Area (NYC / Northern NJ / Fairfield–Westchester CT) Work Model: Hybrid — 3 days on-site at primary data-center campus in Midtown Manhattan or Secaucus, NJ; 2 days WFH. Clearance: None required, but ability to pass a Tier 2 public-trust background check is a must. Travel: < 10 % (regional PoP / DR-site visits) About Us AITHERAS, LLC is a customer-focused IT consulting firm delivering cost-effective, mission-critical solutions since 2002. We specialize in Data Analytics, Cloud Computing, IT Engineering, Application Development, and Cyber Security. Based in Rockville, MD, we’re ISO 9001:2015 certified, an SBA-designated Small Business, and an MBE-certified firm by MDOT. We partner with over 100 clients to create scalable, innovative solutions that drive success. What You’ll Do % Time Responsibility 40 % Design & Implementation – Build and migrate segmentation zones, VRFs, and BGP/OSPF fabrics across Cisco Nexus 9K, Juniper QFX/MX, and Palo Alto PA-Series. 25 % Security & Visibility – Stand up TACACS+/Cisco ISE for AAA, integrate flow telemetry into Cisco Secure Network Analytics (StealthWatch), deploy taps/SPANs/Gigamon, and tune IDS/IPS policies for OT & IT. 15 % Automation – Write and maintain Python/Ansible/Terraform pipelines (pyATS, Nornir, Jinja2) for golden-config generation, compliance drift detection, and CI/CD-based push-button rollouts. 10 % Operations & Incident Response – Serve as L3 escalation and join a 1-week-per-6 on-call rotation; own post-mortems and MTTR metrics. 10 % Documentation & Mentoring – Produce HLDs/LLDs, MOPs, and runbooks; coach junior engineers toward CCNP/PCNSE. Must-Have Qualifications + 8+ years progressive experience in enterprise or service-provider networking. + Deep expertise configuring and troubleshooting BGP, OSPF, static routing, VRFs, VXLAN-EVPN. + Hands-on with Cisco Catalyst/Nexus & ASA/FTD, Juniper EX / QFX / MX, and Palo Alto NGFWs (Pan-OS 9/10). + Solid command of AAA (TACACS+, RADIUS) and production deployments of Cisco ISE or equivalent. + Practical experience deploying or operating flow-analytics / tap infrastructure (StealthWatch, Gigamon, NetFlow/IPFIX, SPANs). + Comfort writing Python and Ansible playbooks; git-based workflows (GitLab/GitHub, CI pipelines). + Familiarity with network IDS/IPS (Snort, Zeek, Palo Alto Threat Prevention) and SIEM workflows (Splunk, QRadar). + Ability to create HLD/LLD diagrams in Visio or draw.io and present them to technical & business leadership. + U.S. work authorization and ability to commute to NYC area 3× week. Nice to Have + CCNP Enterprise/Security, PCNSE, JNCIS-ENT/Sec, or CCIE (R&S / Enterprise). + Cisco Secure Network Analytics design experience (flow collector sizing, policy tuning). + Prior exposure to industrial / OT networks (NIST 800-82, Purdue Model, SCADA segmentation). + AWS or Azure Advanced Networking certification; Transit Gateway design experience. + Experience with F5 LTM/GTM or Citrix ADC in low-latency trading or fintech environments. + Source-of-truth & intent platforms (NetBox, Nautobot), RESTful API development, or Go/Rust scripting. What We Offer + Base Salary: FTE: 135K-140K or $90-$100 C2C/1099 + FTE Benefits: 100 % employer-paid medical / dental / vision, 401(k) 5 % match, ESPP + FTE Training: $3 k annual cert stipend, paid time for labs & conferences (Cisco Live, Palo Alto Ignite)   Powered by JazzHR