What are the responsibilities and job description for the Network Engineer position at SISL Global?
Job Title: Senior Network Engineer (L3 ) – Datacenter Deployment & Operations (CCNP)
Role Overview
We are seeking a highly skilled Senior Network Engineer (L3 ) with Datacenter experience to join our Deployment & Support team. This role involves designing, deploying, operating, and optimizing large-scale, highly available network infrastructures across data centers and POP (Point of Presence) environments.
The ideal candidate will have deep expertise in Layer 2/Layer 3 networking, datacenter architecture, automation, and security, along with hands-on experience in Cisco and Palo Alto platforms.
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Key Responsibilities
1. Deployment & Operations
· Deploy, configure, and maintain large-scale datacenter and POP network infrastructure
· Work with Cisco (C9200, C9300X) and Palo Alto (PA5500) platforms
· Ensure minimal user disruption during deployments, migrations, and upgrades
· Support rack design, cabling, power planning, and hardware installation
· Create rack elevations, floor layouts, port maps, and wiring diagrams
· Manage asset lifecycle and inventory of networking equipment
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2. Datacenter & POP Engineering
· Design and implement datacenter network architecture
· Work with colocation vendors, carriers, and facilities teams
· Handle power, cooling, and capacity planning
· Create Statements of Work (SOWs) for vendors
· Ensure adherence to datacenter best practices
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3. Troubleshooting & Incident Management
· Perform deep-dive troubleshooting of complex L2/L3 issues
· Conduct root cause analysis (RCA) and implement permanent fixes
· Diagnose failures across network devices, servers, and optical links
· Escalate issues and collaborate with cross-functional teams
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4. Network Automation
· Develop automation using:
o Python
o Ansible
o Terraform
· Build scripts for:
o Configuration management
o Provisioning
o Monitoring & remediation
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5. Performance & Optimization
· Monitor network performance and capacity
· Identify bottlenecks and improve:
o Latency
o Throughput
· Implement proactive optimizations
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6. Security & Compliance
· Manage firewalls and security policies (Palo Alto, Panorama)
· Ensure compliance with security standards
· Implement L2/L3 security best practices
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7. Documentation & Process Improvement
· Maintain accurate documentation:
o IP/VLAN plans
o Network diagrams
o Change logs
· Improve operational processes and automation
· Manage RMA processes and vendor coordination
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Required Qualifications
Experience
· 7 years in enterprise/datacenter network engineering (L3 )
· Experience in large-scale infrastructure, ISP, cloud, or tech environments
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Networking Expertise (L3 )
· Expert knowledge of:
o TCP/IP
o Routing protocols
o IPv4/IPv6
o Traffic analysis and packet capture
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Networking Expertise (L2)
· Strong hands-on experience with:
o STP / RSTP / MSTP
o VLANs & Trunking
o EtherChannel / LAG
o VTP
o L2 security and stability
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Datacenter & Hardware
· Hands-on with:
o Cisco IOS-XE (C9200, C9300X)
o Palo Alto PAN-OS
· Experience with:
o StackWise / StackWise Virtual
o Optical networking & fiber troubleshooting
o DWDM (preferred)
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Automation & Systems
· Python scripting (must-have)
· Ansible (preferred)
· Linux OS proficiency
· API-based automation
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Security
· Strong knowledge of:
o Firewalls
o Network security practices
o Palo Alto Panorama
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Certifications:
· CCNP (Mandatory / Strongly Preferred)
· CCNA / JNCIA / RHCT (plus)
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Preferred Qualifications
· Experience with monitoring tools:
o Zabbix, PRTG
· Exposure to:
o Virtualization
o Storage systems
· Strong understanding of:
o Fiber optics (cabling, connectors, patch panels)
· Experience working with:
o Global teams
o Service providers and colocation facilities
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Project Lifecycle Responsibilities
1. Preparation Phase
· Network design and planning
· Hardware configuration and cabling support
2. Migration Phase
· Execute phased migrations (cell-by-cell)
· Ensure minimal disruption to users
3. BAU (Business as Usual)
· Support new deployments
· Troubleshoot issues
· Manage VLANs and IP changes
· Update firewall policies and documentation
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Additional Requirements
· Strong analytical and problem-solving skills
· Excellent communication and coordination abilities
· Ability to work in a fast-paced global environment
· Willingness to travel (10–30%)
· Ability to handle physical tasks (lifting equipment if needed)
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Education
· Bachelor’s or Master’s degree in:
o Computer Science
o Networking
o Electrical Engineering
o Related field
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Summary
This role is ideal for a CCNP-certified Senior Network Engineer (L3 ) with deep datacenter deployment, operations, and automation experience, capable of managing large-scale, mission-critical networks end-to-end.