Network & Security Engineer

BIT Solution Pte Ltd; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

BIT Solution Pte Ltd in Singapore seeks a Network & Security professional to design and deliver enterprise network and security projects, support presales, and provide advanced troubleshooting.

You'll work across routing, switching, wireless, firewall platforms, and cloud connectivity (AWS, SSE/SASE, Azure, Alibaba Cloud). CCNA is required; CCNP preferred.

If you enjoy customer-facing discussions and documentation, this role offers varied delivery work and collaboration with vendors and clients.

Qualifications

• 3–5 years hands-on network and security project experience.
• Proficient in enterprise routing and switching.
• Solid knowledge of TCP/IP, VLAN, STP, LACP, OSPF/BGP, NAT, ACLs, and network segmentation.

Responsibilities

• Design enterprise network and security solutions per customer requirements.
• Prepare high- and low-level network designs, implementation and migration plans.
• Implement routing, switching, wireless, firewall, VPN, and cloud connectivity.
• Support AWS networking (VPC, subnets, VPN, security groups).
• Provide advanced troubleshooting and engage vendors to resolve issues.
• Support presales activities and prepare technical proposals.
• Ensure project deliverables meet scope, timelines, and quality.

Skills

Routing & Switching

TCP/IP

VLAN

OSPF/BGP

NAT/ACLs

Network Segmentation

Wireless Networking

Firewall Policy

AWS Networking

Network Design

Customer Communication

Education

CCNA certification

CCNP certification

Job description

Role Summary

The Network & Security will be responsible for delivering enterprise network and security projects, supporting presales activities, designing technical solutions, and providing advanced troubleshooting support.

The role requires strong technical capability across enterprise routing and switching, enterprise wireless, firewall/security platforms, and AWS networking. Experience in SSE/SASE, Alibaba Cloud, Microsoft Azure, and loadbalancer technologies will be considered an advantage.

Key Responsibilities:

Network & Security Design

• Design enterprise network and security solutions based on customer requirements.
• Prepare network diagrams, high-level designs, low-level designs, implementation plans, and migration plans.
• Design LAN, WAN, wireless, firewall, VPN, and cloud connectivity solutions.
• Review existing customer network environments and recommend improvements.

Project Implementation

• Implement enterprise routing and switching solutions.
• Implement enterprise wireless solutions, including controller-based and cloud-managed wireless platforms.
• Implement firewall and security solutions such as Fortinet, Palo Alto, Check Point, Cisco, SonicWall, WatchGuard, or equivalent platforms.
• Implement site-to-site VPN, remote access VPN, network segmentation, security policies, NAT, routing, and firewall rules.
• Support AWS networking implementation, including VPC, subnetting, routing, VPN, security groups, network ACLs, and cloud connectivity.
• Support implementation of additional platforms such as SSE/SASE, Azure networking, Alibaba Cloud networking, and load balancers where required.

Troubleshooting & Support

• Provide advanced troubleshooting for LAN, WAN, wireless, firewall, VPN, and cloud networking issues.
• Analyze and resolve network performance, connectivity, routing, wireless, and security policy issues.
• Work with vendors, principals, and internal teams to resolve complex technical problems.
• Support customer escalations and ensure timely resolution of technical issues.

Presales & Customer Engagement

• Support presales activities, including customer meetings, technical presentations, solution discussions, and proof-of-concept activities.
• Assist in preparing technical proposals, solution write-ups, implementation scope, and effort estimation.
• Engage customers professionally and translate business or technical requirements into workable solutions.

Project Delivery & Documentation

• Ensure project deliverables are completed according to agreed scope, timeline, and quality expectations.
• Prepare proper project documentation, including configuration records, test results, handover documents, and as-built diagrams.
• Work closely with project managers, engineers, vendors, and customers to ensure successful project delivery.

Must-Have Requirements

• Minimum 3 to 5 years of hands-on experience in network and security project implementation or support.
• Strong experience in enterprise routing and switching.
• Strong knowledge of TCP/IP, VLAN, STP, LACP, static routing, OSPF, BGP, NAT, ACLs, and network segmentation.
• Strong experience in enterprise wireless implementation and troubleshooting.
• Strong experience in firewall implementation and policy configuration.
• Hands-on experience with AWS networking, including VPC, subnets, route tables, security groups, VPN, and cloud connectivity.
• Experience in network design, migration, implementation, troubleshooting, and documentation.
• Able to handle customer-facing technical discussions and project delivery responsibilities.
• Able to work during weekends, maintenance windows, or after-office hours when required.
• CCNA certification is mandatory.

Preferred Requirements

• CCNP certification is preferred.
• Experience with enterprise wireless platforms such as Cisco, Aruba, Huawei, Ruckus, or equivalent.
• Experience with firewall platforms such as Fortinet, Palo Alto, Check Point, Cisco, SonicWall, WatchGuard, or equivalent.
• Experience with SSE/SASE solutions such as Zscaler, Netskope, Palo Alto Prisma Access, FortiSASE, or equivalent.
• Experience with Microsoft Azure networking.
• Experience with Alibaba Cloud networking.
• Experience with load balancers such as F5, Citrix NetScaler / ADC, FortiADC, or equivalent.
• Experience with SD-WAN, NAC, IDS/IPS, web security, email security, endpoint security, or DLP will be advantageous.
• Other relevant vendor certifications will also be considered.