524 Network Protocols jobs in Singapore

Job Title: Billing Officer Invoicing/Data Entry

Be part of a dynamic team and take on the challenge as a Billing Officer where you will be responsible for generating and sending accurate invoices to customers or clients, ensuring that billing is done according to company policies, client agreements, and payment terms.

Key Responsibilities:

• Generate and send invoices to customers or clients.
• Ensure billing accuracy and completeness by reviewing client accounts and billing histories.
• Correct billing errors and discrepancies promptly.

Responsibilities (Continued):

• Input billing data into the accounting or billing system.
• Maintain detailed records of transactions, invoices, and payment histories.
• Ensure client and payment information is up to date in the system.

Customer Service:

• Address and resolve client billing inquiries and disputes.
• Provide support to clients regarding billing and payment concerns.
• Assist clients with setting up payment plans or resolving issues related to their invoices.

Reporting and Compliance:

• Prepare and generate regular reports on billing and payment statuses for management.
• Assist in reconciling accounts receivable balances.
• Maintain accurate records to assist in the preparation of financial reports.

Requirements:

• At least 1 year of experience in billing, invoicing, or accounts receivable preferred.
• Proficient in Microsoft Excel and comfortable handling data entry and reports.

Overview

The Network Engineer will design, implement, and support network infrastructure to ensure high availability, performance, and security. This role involves collaborating with project teams to troubleshoot issues, optimize network environments, and deliver successful projects. The ideal candidate will have hands-on experience with network hardware, software, and protocols, as well as a focus on continuous improvement and security.

• Design, configure, and deploy network solutions, including LAN/WAN, wireless, and VPN.
• Plan and implement network upgrades and installations based on industry best practices.
• Monitor network performance, diagnose issues, and perform health checks and capacity planning.
• Implement and maintain network security protocols, such as firewalls, VPNs, IDS/IPS, and network segmentation.
• Collaborate with cybersecurity teams to protect network infrastructure from threats.
• Integrate network security tools like AD, MFA, Clearpass, and NMS.
• Analyze network traffic and optimize infrastructure to meet business needs.
• Maintain detailed documentation of network architecture, configurations, and troubleshooting procedures.
• Generate reports on network performance, incidents, and infrastructure status.
• Provide backup and restore solutions for network appliances.
• Work with internal teams and vendors to support network requirements and resolve issues.
• Mentor junior team members and provide technical guidance.

• Bachelor’s degree in Computer Science, Information Technology, Networking, or a related field (or equivalent experience).
• 2-3 years of hands-on experience in network infrastructure design, implementation, and administration.
• Experience with enterprise-level networking equipment, including routers, switches, firewalls, load balancers, and wireless access points.
• Proficiency in networking protocols: TCP/IP, BGP, OSPF, DNS, DHCP, VPN, VLANs, MPLS, and QoS.
• Familiarity with network monitoring tools (Wireshark, PingPlotter, SolarWinds, PRTG).
• Knowledge of network security best practices and cloud networking (AWS, Azure).
• Experience with SD-WAN, VPN technologies, and automation tools (Python, Ansible) is a plus.
• Strong problem-solving, communication, and organizational skills.
• Preferred certifications: CCNA/CCNP/CCIE, CompTIA Network+, or JNCIA.
• Familiarity with data center operations, virtualized networking (VMware NSX, Hyper-V), and hybrid/cloud environments is desirable.

• Entry level

• Full-time

• Information Technology

• IT Services and IT Consulting

Overview

About Hitachi Rail: A career at Hitachi Rail helps create a legacy. With operations worldwide, we are at the cutting edge of digital transformation and technology. Our global, diverse team works in sustainable and innovative ways to bring people together. Location: Singapore, Singapore (On-Site).

Role: Network Engineer (Ref. No. R ) at our location in Singapore. You will be part of Ground Transportation Systems (GTS), advancing rail signalling and safety solutions to ensure safe and efficient railway operations worldwide.

Our technologies help billions of people reliably reach their destinations by rail every year, contributing to sustainable mobility.

• Provide custom engineering services, solution architecture, IP network design and implementation, project management, and capacity planning for large network infrastructure projects, including information security, bandwidth management, and remote access solutions.
• Network monitoring and troubleshooting.
• SDWAN configuration and support.
• Firewall configurations and support.
• Network security appliances configurations and implementations.
• Cisco Wireless and ISE.
• Cloud technologies: AWS, Azure, Bare Metal.

• 5 to 10 years of experience in networking technologies (routing/switching, firewalls, load balancing, proxy, etc.).
• Exceptional troubleshooting capabilities.
• University Degree/College Diploma or equivalent job experience.
• Desired qualifications: Routing and Switching technologies, Firewall expertise (Fortigate, Palo Alto), Load Balancing, Web proxy technology.

• Stronger together: Networking through internal networks and international teams.
• Our drive: Laying the foundations for the digitization of rail to safely bring people to their destinations.
• Attractive conditions: A secure and permanent job with a global company.

Notes: Equal opportunities and respect for all individuals are core principles. We offer equal opportunities to start a career and provide training and further education. We promote diversity and teamwork.

We invite you to apply via our career portal. For more information about Hitachi Rail and GTS, please visit

At Hitachi Rail, there is a place for everyone. We value differences in background, age, gender, sexuality, family status, disability, race, nationality, ethnicity, religion, and world view. We are committed to creating an inclusive environment and are proud to be an equal opportunity employer.

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Overview

The Network Engineer will design, implement, and support network infrastructure to ensure high availability, performance, and security. This role involves collaborating with project teams to troubleshoot issues, optimize network environments, and deliver successful projects. The ideal candidate will have hands-on experience with network hardware, software, and protocols, as well as a focus on continuous improvement and security.

• Design, configure, and deploy network solutions, including LAN/WAN, wireless, and VPN.
• Plan and implement network upgrades and installations based on industry best practices.
• Monitor network performance, diagnose issues, and perform health checks and capacity planning.
• Implement and maintain network security protocols, such as firewalls, VPNs, IDS/IPS, and network segmentation.
• Collaborate with cybersecurity teams to protect network infrastructure from threats.
• Integrate network security tools like AD, MFA, Clearpass, and NMS.
• Analyze network traffic and optimize infrastructure to meet business needs.
• Maintain detailed documentation of network architecture, configurations, and troubleshooting procedures.
• Generate reports on network performance, incidents, and infrastructure status.
• Provide backup and restore solutions for network appliances.
• Work with internal teams and vendors to support network requirements and resolve issues.
• Mentor junior team members and provide technical guidance.

• Bachelor’s degree in Computer Science, Information Technology, Networking, or a related field (or equivalent experience).
• 2-3 years of hands-on experience in network infrastructure design, implementation, and administration.
• Experience with enterprise-level networking equipment, including routers, switches, firewalls, load balancers, and wireless access points.
• Proficiency in networking protocols: TCP/IP, BGP, OSPF, DNS, DHCP, VPN, VLANs, MPLS, and QoS.
• Familiarity with network monitoring tools (Wireshark, PingPlotter, SolarWinds, PRTG).
• Knowledge of network security best practices and cloud networking (AWS, Azure).
• Experience with SD-WAN, VPN technologies, and automation tools (Python, Ansible) is a plus.
• Strong problem-solving, communication, and organizational skills.
• Preferred certifications: CCNA/CCNP/CCIE, CompTIA Network+, or JNCIA.
• Familiarity with data center operations, virtualized networking (VMware NSX, Hyper-V), and hybrid/cloud environments is desirable.

• Entry level

• Full-time

• Information Technology

• IT Services and IT Consulting

Education & Experience requirement

· Minimum Bachelor degree in Information Technology/Network Engineering/Communications

· Minimum 5 years of Project Management & relevant hands-on working experience with strong understanding on IGP/EGP Routing Protocols, Switching, VPN, Security, Wireless, Multicast, and Network & Device Management.

· Must be familiar and professionally certified with industries’ well-known network devices including but not limited to Cisco, Huawei, FortiGate, Sonicwall, WatchGuard, Mikrotik, TP-Link, Ubiquiti, Ruijie and Engenious in Enterprise environment.

· Technical expertise in following Network Technologies:

ü Switching: VLAN, VTP, Trunk, EtherChannel, Spanning tree

ü Routing and multicast: BGP, OSPF, IS-IS, EIGRP, Redistribution, Policy routing, with any routing protocol, PIM, SSM, IGMP, RP, HSRP, VRRP, GLBP

ü WAN: MPLS VPN, GRE tunnelling, DMVPN, FlexVPN, Site to Site IPsec VPN (IKEv1 and IKEv2)

ü Security: Firewalls, Network Access Controls, ACL, IPsec

ü Network Management: SNMP, NTP

ü Wireless: WLC, Roaming, Guest Services

Job Description

· Project management for the Company’s Security System Integration projects.

· Design, deploy, and configure network infrastructure components, including routers, switches, firewalls, Access Point and CCTV.

· Document network configurations, diagrams, procedures, burn-in-test UAT, migration plan and policies to ensure accurate and up-to-date records.

· Responsible for network design and security including but not limited to troubleshooting and debugging network-related problems.

· Responsible for deploying new network and network migration.

· Perform requirement gathering and problem analysis.

What's On Offer:

Job Type: 1 Year Contract (Highly Renewable)
Industry: End-User Environment
Location: Singapore

Role Overview:

We are seeking a highly skilled Network Engineer to support the daily operations, maintenance, and optimisation of our client's Data Centre and Core Network infrastructure. The successful candidate will be responsible for managing the end-to-end lifecycle of network components, supporting project delivery, performing upgrades, and contributing to infrastructure refresh initiatives.

Key Responsibilities:

• Design, deploy, and maintain a robust network infrastructure, including LAN, WAN, VPN, Wireless, TACACS, and Firewall systems.
• Monitor network health and performance, proactively addressing issues to ensure maximum uptime and efficiency.
• Configure and manage network hardware including routers, switches, firewalls, load balancers, ACI, and VPN/microsegmentation tools.
• Lead and support network upgrades, migrations, and integration projects, including planning, testing, and documentation.
• Collaborate cross-functionally with other IT teams to resolve system-related issues and drive seamless integration.
• Maintain detailed and accurate network documentation—diagrams, IP schemas, change records, and configurations.
• Respond to incidents and outages, perform root cause analysis, and implement preventive measures.
• Participate in on-call rotations and provide after-hours support as needed.
• Ensure compliance with change and configuration management policies.
• Liaise with vendors and external partners for troubleshooting and escalation support.

What's Required:

• Minimum 5 years’ hands-on experience in network infrastructure operations, design, and implementation.
• Strong operational knowledge of Cisco routers/switches, Cisco ACI, Fortinet Firewalls, F5 Load Balancers, Aruba Wireless, Aruba ClearPass, and SolarWinds.
• Deep understanding of core networking protocols (e.g., IPSEC, HSRP, BGP, OSPF, 802.11, QoS).
• Solid grasp of the OSI/TCP-IP models and enterprise-level network design (segmentation, segregation, SDN).
• Experience with network monitoring, diagnostics, and analytics tools.
• Knowledge of the ITIL framework and project management life cycle is preferred.
• Programming experience with Python is an added advantage.
• Bachelor’s Degree in Computer Science, Information Technology, or a related field.
• Professional certifications such as CCNP are essential.
• Additional certifications in SDN, firewall, or cloud networking are advantageous.

Direct message the job poster from Innova Solutions

My client is a looking for skilled Network Engineer with strong hands-on experience in the design, configuration, and implementation of network solutions. The ideal candidate will have expertise in managing networks, ensuring high availability, performance, and security across infrastructure. For interested candidates feel free to send in your updated profile for a confidential chat.

• Proven hands-on experience in network implementation and configuration
• Perform maintenance for IT network related equipment.
• Liaise with 3rd party service providers and BU for maintenance and support to ensure that the service levels are met.
• Coordinate with the project teams in setup and installation of IT network infrastructure, where required.
• Prepare the corresponding technical documentation
• Cisco & Arista network switches, Palo Alto firewalls, Forescout EyeInspect and Aruba Wi-Fi
• Due to the restrictions of the project, we are only able to accommodate Singaporeans and SPR

• Mid-Senior level

• Contract

• Information Technology

• Computer and Network Security

Overview

We are seeking an experienced Network Engineer – Advanced Routing & Switching to join our team. The role involves designing, implementing, and maintaining enterprise-level LAN/WAN networks, resolving complex network issues, and ensuring network reliability, scalability, and performance. This individual will work independently on moderate to complex assignments while adhering to company policies, procedures, and SLAs.

• Provide L2/L3 network operations support , including the design, implementation, and maintenance of LAN and WAN infrastructure.
• Troubleshoot and resolve complex network-related incidents with minimal supervision.
• Design, plan, and execute network projects in alignment with business requirements.
• Conduct change reviews and impact analyses for proposed network changes.
• Identify areas of improvement, recommend solutions, and implement measures to reduce recurring faults .
• Plan, prioritize, and execute planned maintenance to address growth, hardware/software defects, and capacity requirements.
• Perform network capacity management and proactively monitor utilization trends.
• Drive service level improvements through monitoring enhancements, design optimization, and capacity management.
• Diagnose and resolve chronic or recurring network issues .
• Participate in on-call rotation for after-hours support as required.
• Perform firewall compliance analysis and implement approved firewall rule requests.
• Manage and maintain Palo Alto firewalls, Cisco routers/switches, and F5 LTM load balancers (including upgrades).
• Prepare and maintain Standard Operating Procedures (SOPs) and technical documentation.
• Leverage knowledge of AWS cloud for integration and troubleshooting; hands-on experience is highly valued.
• Ensure adherence to IT Service Management (ITSM) processes , including incident, problem, and change management.
• Handle ad hoc operational and project-based tasks as assigned.
• Ensure timely incident resolution in line with SLAs and proactively follow up on service requests.
• Coordinate with vendors for escalations and case resolution.
• Collaborate effectively within a team environment and demonstrate ownership of assigned responsibilities.

• Minimum Diploma in Computer Engineering or equivalent.
• 4+ years of relevant experience in networking domain.
• Preferred Certifications :
• ITIL Foundation

• Strong expertise in Cisco Routing & Switching .
• Solid hands-on experience with Palo Alto Firewalls, F5 LTM, and Load Balancer upgrades .
• Good understanding of AWS cloud technologies (work experience preferred).
• Excellent troubleshooting and problem-resolution skills .
• Knowledge of firewall and network security concepts .
• Familiarity with SSL offloading concepts .
• Strong written and verbal communication skills with the ability to articulate complex issues clearly.
• Ability to work under pressure , adapt to new technologies quickly, and manage time efficiently.
• Team player with commitment to task ownership and timely delivery .

• Seniority level: Mid-Senior level
• Employment type: Contract
• Job function: Information Technology
• Industries: IT Services and IT Consulting

Overview

Hitachi Digital Services Vietnam is part of a global digital solutions and transformation business. We collaborate with teams worldwide to deliver cloud migration, digital modernization, and advanced analytics, offering operational excellence and agile delivery on large transformation projects.

Meet our Team: Hitachi Digital Services Vietnam is part of a 300-strong global delivery network, supporting Hitachi around the globe. Our employees collaborate with teams in India, Portugal, and the US, servicing customers worldwide.

We value life experience, character, perspective, and passion for achieving great things in the world, alongside required skills.

DEI and inclusion are integral to our culture. We encourage people from all backgrounds to apply and realize their full potential. We are an equal opportunity employer and welcome all applicants for employment without attention to race, colour, religion, sex, sexual orientation, gender identity, national origin, veteran status, age, disability status, or any other protected characteristic.

• Design, specify and cost detailed Network and Infra solutions, including:
  • Interpreting requirements and producing fully detailed and compliant designs
  • Interfacing with customer engineers for design definition
  • Interfacing with other system-wide designers for service definition
  • Interfacing with suppliers and vendors for product definition
  • Evaluating and costing the most suitable products and systems
• During site implementation, testing and commissioning the Network
  • Able to lead test engineers to deliver testing activities against stringent timescales
• Keep track of progress of all design and interface tasks
  • Carrying out assigned work efficiently with minimal supervision
  • Expediting response and deliverables (documents, engineering drawings, specifications, design reports and calculations, equipment details and other project information)

• Professional knowledge and experience in network detailed design and implementations
  • Technologies including SDH, SR-MPLS, MPLS-TP, IP, IP/MPLS, Ethernet
  • Cable network design (fibre, copper, structured cabling)
  • 4G/5G/WiFi network design
  • Infra design (Virtualisation, VMWare, Windows, Linux, IT services)
  • Cybersecurity implementation (hardening, firewall, antivirus)
  • Scripting for automation/generation of configurations
  • Issue analysis (Wireshark)
  • Network detail design, administration, troubleshooting, capacity optimization
  • Network security design and implementation
• Demonstrates initiative and resourcefulness in solving problems
• Analytical in design activities with ability to use pertinent data for meticulous recommendations
• Makes timely and well-considered technical decisions, independently and collaboratively
• Qualifications (Academic, Professional)
• Degree in Electrical / Electronic / Telecommunications Engineering
• Professional qualifications (preferred): CCNA, CCNP, CCDA; HCIA/HCIP; or other vendor certifications (e.g., Juniper JNCIE)

We’re a global team of innovators turning organizations into data-driven leaders and delivering meaningful solutions to complex challenges. If you believe innovation can bring a better tomorrow closer to today, this is the place for you.

Diversity, equity, and inclusion (DEI) are integral to our culture. We encourage diverse thinking, allyship, and empowerment, and invite people from all backgrounds to apply and realize their full potential as part of our team.

We offer industry-leading benefits, support, and services for holistic health and wellbeing. We support work-life balance with flexible arrangements (role and location dependent). We aim to create a sense of belonging, autonomy, freedom, and ownership as you work with talented colleagues.

We’re proud to be an equal opportunity employer and welcome all applicants without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, veteran status, age, disability status, or any other protected characteristic. If you need reasonable accommodations during the recruitment process, please let us know so we can assist.

• Entry level

• Full-time

• Information Technology

• IT Services and IT Consulting