Sr. Network Security Engineer

• Responsible for overall support and implementation of Yahoo s Network infrastructure
• Develops customized network solutions and systems for varied Yahoo products to include capacity planning and modelling, network performance analysis, network security and network configurations leveraging varied network technologies such as routing, switching, load balancing, metro networks, dark fiber networks, transport backbone network, vpn and encryption technologies, voice over ip.
• Work with internal and external customers to gather requirements, provide guidance and network security design support.
• Maintain/build/deploy network security policies (otherwise known as access-lists, or ACLs) across multiple networking platforms (Juniper/Cisco/Juniper SRX/Palo Alto Networks/etc)

As part of a 24/7 oncall rotation:

• Engineers are expected to respond/triage the alerts and take necessary actions to stop or divert the attack and protect Yahoo assets (DDOS Monitoring [IP, ICMP, TCP, UDP]).
• Respond to escalations, tickets, and alerts from NOC and Helpdesk issued to network security in a timely manner.
• Provide incident resolution information and work with other teams to complete impact analysis where appropriate.

• Independently lead and manage high visibility projects end-to-end with aggressive deadlines
• Mentor and lead with confidence and consistency

• Firewall technologies and VPNs (Remote Access VPNs, Site to Site VPNs, IPSEC VPNs)
• Experience with a variety of devices types in Juniper/Cisco/Palo Alto Networks firewall,router & switches is required
• Strong understanding of Network DDoS and other types of network integrity attacks and resolution techniques
• Strong understanding of network technologies/protocols. (VRRP, BGP, ISIS, OSPF, IPSEC, etc)
• Working with centralized authentication systems (TACACS, Radius)
• Network security fundamentals (Transitive trust, Security policies, and encryption)
• Knowledge of network programming //automation utilizing Perl, Python, GO, etc Continuous integration // continuous development is a plus.
• Excellent documentation, communication, and problem resolution skills.
• Bachelors or Master s degree in Computer Science preferred.
• YoE: Network/Network Security/DevOps: 5-7 years

• Apply probabilistic, machine learning and data mining techniques to engineer production software to improve infrastructure scalability, efficiency as we'll as end user experience
• Working experience with at least one Public Cloud platforms
  • AWS // Azure // Google Cloud // etc
• TLS Encryption

• The role requires flexibility to work in US shifts (night shifts or late evening hours as per US time zones) to ensure alignment with global teams.