Senior Network & Security Administrator/Engineer

Senior Network & Security Administrator/Engineer – Job Description

General Information

• Job Title: Network & Security Administrator/Engineer

• Location: Rosemead, CA

• Duration: 6 months

• GBaMS ReqID: 10963342

• Role Focus: Datacenter & Cloud Network Security

• Work Environment: Operations, Projects, Architecture, and Team Collaboration

Role Description

• Work as a Senior Subject Matter Expert in Network and Security Administration/Engineering for datacenter and cloud environments.

• Support operations, project delivery, and architecture requirements.

• Design, build, implement, maintain, and troubleshoot enterprise network and security solutions.

• Collaborate with clients, architects, operations teams, and vendors to deliver innovative technical solutions.

• Provide Level 3/Level 4 support for complex network and security issues.

• Ensure network availability, performance, security, and compliance with industry best practices.

Must-Have Technical Skills

1. Core Networking and Datacenter Networks

• Strong fundamentals and in-depth understanding of IPv4, TCP/IP, and core networking concepts.

• Hands-on experience with datacenter and cloud networking.

• Cisco Layer 2 and Layer 3 switching, including:

  • Cisco Nexus

  • Cisco Catalyst

  • Cisco ACI

• VLAN configuration and management.

• Static and dynamic routing protocols, including BGP and EIGRP.

• Network access controls and security policy management.

• Network architecture design, solution delivery, and network diagram development.

• Network segmentation and IP address management.

• Cisco SDN, ACI, and Leaf-Spine network design and architecture.

2. Palo Alto Network Security and Firewalls

• Hands-on experience with Palo Alto Networks firewalls.

• Initial firewall setup, configuration, and deployment.

• Security policy, zone, and NAT configuration.

• Firewall OS upgrades, hardware refreshes, and troubleshooting.

• Firewall solution delivery, license renewals, and maintenance.

• Site-to-site VPN tunnel configuration and troubleshooting.

• Implementation and management of security and NAT policies.

• Experience with Palo Alto security technologies, including:

  • WildFire

  • URL Filtering

  • Firewall security policies

• Palo Alto GlobalProtect remote-access VPN setup and troubleshooting.

3. Web Application Firewall (WAF) and DDoS Protection

• End-to-end support for cloud-based Web Application Firewalls (WAF).

• WAF design, architecture, implementation, configuration, troubleshooting, and maintenance.

• Experience with Imperva WAF is preferred.

• Hands-on experience with DDoS prevention and protection solutions.

• Experience with Imperva Incapsula is preferred.

4. Network Access Control (NAC) and Cloud Proxy

• End-to-end support for endpoint Network Access Control (NAC) solutions.

• NAC design, implementation, configuration, troubleshooting, and maintenance.

• Policy management, OS upgrades, hardware refreshes, and license renewals.

• Experience with ForeScout NAC is preferred.

• Hands-on knowledge of cloud proxy solutions.

• Experience with Netskope is preferred.

5. Load Balancers

• Hands-on experience with F5 Local Traffic Manager (LTM) and Global Traffic Manager (GTM).

• Network and DNS load balancing configuration and management.

• End-to-end support, design, implementation, and troubleshooting.

• OS upgrades, hardware refreshes, and license renewals.

• Maintenance and optimization of load-balancing solutions.

6. Network Monitoring and Troubleshooting

• Strong network problem analysis and troubleshooting skills.

• Experience with the following tools:

  • TCPDUMP

  • Wireshark

  • Splunk

  • NetScout traffic analysis tools

• Proficiency in using packet broker switches to capture live network traffic.

• Experience with packet capture and visibility solutions such as:

  • Ixia

  • Gigamon

• Advanced diagnostic techniques for identifying network performance and connectivity issues.

• Level 3/Level 4 problem determination and root cause analysis.

• Experience handling high-priority incidents and troubleshooting issues during live calls.

7. Datacenter Infrastructure

• Experience working with datacenter cabling teams.

• Understanding of datacenter racking and unracking procedures.

• Knowledge of datacenter standards and infrastructure practices.

• Experience with TAP usage and network traffic monitoring.

• Understanding of power supply placement and optimal rack utilization.

8. ITIL and Operations Support

• Expertise in applying ITIL methodologies.

• Understanding of operational support best practices.

• Experience with network automation and technology management.

• Strong incident management, problem management, and troubleshooting capabilities.

• Knowledge of current computing technologies, network security practices, and industry trends.

Good-to-Have Skills

• Hands-on experience with Cisco ACI.

• Knowledge of RSA security technologies.

• Cloud networking experience with Microsoft Azure.

• Cloud networking experience with Google Cloud Platform (GCP).

• Experience with cloud security architecture and enterprise network integration.

Key Responsibilities

• Manage front-end client interactions and understand technical and business requirements.

• Design network solutions and develop network architecture plans.

• Build and implement network and security architectures.

• Respond to client requirements and propose innovative technical solutions.

• Support network operations, project delivery, and architecture initiatives.

• Resolve major network and security incidents.

• Provide advanced troubleshooting and root cause analysis for complex technical problems.

• Collaborate with support teams, clients, architects, and vendors.

• Work effectively as a team player in a fast-paced, dynamic environment.

• Coach and mentor team members.

• Develop and maintain technical documentation, network diagrams, and operational procedures.

• Ensure network stability, availability, performance, and security.

• Support enterprise network environments involving TCP/IP, Cisco routers and switches, firewalls, and load balancers.

• Apply a strong understanding of telecommunications concepts and network connectivity.

• Stay updated on emerging technologies, cybersecurity practices, and network architecture trends.

Required Professional and Communication Skills

• Strong analytical and problem-solving skills.

• Excellent verbal and written communication skills.

• Ability to interact effectively with clients, support groups, and vendors.

• Strong organizational and multitasking abilities.

• Self-motivated, proactive, and capable of working independently.

• Ability to work collaboratively across technical teams.

• Strong documentation, knowledge-sharing, and mentoring skills.

• Ability to manage critical incidents and prioritize tasks in a fast-paced environment.