711 Network Maintenance jobs in Singapore

Job Title:

This is a challenging role that requires the right individual to oversee and maintain radio access network equipment, diagnose and resolve complex network issues, implement updates and upgrades, and monitor and enhance network efficiency.

Key Responsibilities include:

• Oversee daily operations and upkeep of RAN equipment ensuring optimal performance.
• Diagnose and resolve network issues to maintain service quality.
• Implement updates and upgrades for RAN components to improve efficiency.
• Monitor and enhance network efficiency and effectiveness through data analysis and optimization techniques.
• Perform RF testing and optimization for Outdoor 4G and future 5G in-building projects.
• Troubleshoot, design and plan RF network coverage using RF test tools.
• Monitor and identify network failures, execute corrective actions, report and update stakeholders.
• Service new users, update software, confirm failures, assist in tracking and remote wipe of lost devices.
• Provide software support, basic troubleshooting, and escalate to application vendors when necessary.
• Support project teams to meet project delivery milestones.
• Collaborate with sub-contractors to ensure work quality and timely delivery.
• Prepare technical documentation and reports.
• Able to travel around Singapore mainland, Singapore territorial waters, Singapore offshore islands/locations.
• Able to perform standby duty and shift work.
• Able to climb Jacob Ladders (must be able to clear the Jacob ladder course).

Requirements:

• ITE, Diploma or equivalent academic qualification.
• Positive work attitude and self-motivated, with a customer-first mindset.
• Possess 3-years working experience in out-field operations, with at least 1-year relevant experience in the mobile network industry.
• Possess experience in commissioning/maintaining of BTS equipment.
• Possess Class 3 driving license (candidate is required to drive company van).
• Experience in RF Testing for indoor or outdoor is an advantage.
• Experience working in Network Operation Centre (NOC) is an advantage.

Responsibilities:

· To provide technical and maintenance support for the products under the company’s line of businesses

· To work with the team to ensure that clients get the best support they need

· To respond to enquiries professionally

· To able to stage or research before responding to customer

· To flag out complex/difficult cases to team lead and follow through with both external and internal stakeholders

· To document troubleshooting and problem resolution steps

· To be on 24x7 rotating on-call standby for our customers & partners

Requirements:

· ITE or Diploma or Degree in Computer Science/IT Related Fields with a minimum of 1 year Network Security related experience

· Quick and keen to learn new technologies

· Resourceful, creative, independent but able to work well in a team

· Action and customer oriented; Takes initiative and adheres to deadlines

· Taking ownership of technical issues

· Good written and verbal skills; excellent phone manner.

· Firm understanding of TCP/IP, OSI Layer, network security, network routing and switching

· Good troubleshooting skills

· Support Engineers are required to be on 24x7 standby calls on a rotating basis throughout the year

· Relevant network or security certification will be plus point

Interested candidates may send their CV to MAC (Reg No. R1221300) at quoting the job title in the Subject line. We regret that only shortlisted candidates will be notified.

DRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets around the world. We value autonomy and the ability to quickly pivot to capture opportunities, so we operate using our own capital and trading at our own risk.

Headquartered in Chicago with offices throughout the U.S., Canada, Europe, and Asia, we trade a variety of asset classes including Fixed Income, ETFs, Equities, FX, Commodities and Energy across all major global markets. We have also leveraged our expertise and technology to expand into three non-traditional strategies: real estate, venture capital and cryptoassets.

We operate with respect, curiosity and open minds. The people who thrive here share our belief that it’s not just what we do that matters–it's how we do it. DRW is a place of high expectations, integrity, innovation and a willingness to challenge consensus.

We are seeking a Network Security Engineer to join the network security team to ensure that our infrastructure and networks are properly protected. They will design, coordinate and implement security controls, audit configurations, and design networks in a hybrid compute environment. A successful candidate will have an attention to detail, the ability to understand what impacts their changes have on the network and relevant associated services.

What you’ll be doing:

• Collaborate with cross-functional security, technology, and trading teams to design and deploy innovative solutions that enhance both system integrity and trading performance.
• Actively contribute to the design, implementation, and maintenance of mission-critical trading infrastructure that drives resilient and scalable market operations.
• Implement robust strategies to reduce network risks by leveraging micro-segmentation, port-based security, and other innovative methods.
• Evaluate, diagnose, and implement effective network security solutions such as firewalls, network detect and response, intrusion prevention systems (IPS), and VPN concentrators to improve our network security and ensure reliable remote access.
• Leverage automation, AI, and other emerging and innovative technologies to continuously enhance our ability to detect and respond to security events.
• Perform in-depth analysis of network packet captures to investigate security incidents and identify areas for improvement.
• Continuously seek opportunities to automate tasks and streamline security operations for improved efficiency and effectiveness.

What we’re looking for:

• You are passionate about solving complex problems that enable our company to securely connect from anywhere globally to facilitate new business opportunities.
• You are a network security engineer who thrives on designing, implementing, and supporting cutting-edge security systems that keep our network safe from emerging threats.
• You can get your hands dirty with hands-on experience in firewalls, client VPNs, SASE, NDR, and IDS solutions.
• You enjoy scripting and coding to automate processes and reduce repetitive work
• You have a solid understanding of TCP, UDP, IP, the OSI Model, and Layer 1-4 & 7 principles and security protocols.
• You are a dedicated professional who isn’t afraid of stepping up for on-call duties—even if it means working nights or weekends
• You are someone that continuously seeking innovative improvements to drive high-quality, state-of-the-art, and effective security solutions.
• You are an effective communicator, able to translate complex technical insights into clear, actionable strategies that resonate with cross-functional teams.

For more information about DRW's processing activities and our use of job applicants' data, please view our Privacy Notice at .

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NCS is a leading technology services firm that operates across the Asia Pacific region in over 20 cities, providing consulting, digital services, technology solutions, and more. We believe in harnessing the power of technology to achieve extraordinary things, creating lasting value and impact for our communities, partners, and people. Our diverse workforce of 13,000 has delivered large-scale, mission-critical, and multi-platform projects for governments and enterprises in Singapore and the APAC region.

We’re searching for aNetwork & Security Engineer to be part of our diverse team of talent here at NCS!

Overview

As a Network & Security Engineer, you will be responsible for the initial support and maintenance of OneCare’s client. This role provides 24x7 standby onsite and remote troubleshooting support, onsite HW replacement, security patches and firmware or software upgrade of Network and Security devices while ensuring SLA contractual obligation is meet.

What will you do?

Network and Security Maintenance

• Perform routine network maintenance and system upgrades, including service packs, patches, and hot fixes.
• Hardware replacement which requires prepping up the replacement device with same firmware/software and patches with faulty device. This also requires basic to intermediate configuration.

Troubleshooting and Support

• Identify and resolve network and security issues promptly.
• Provide technical support to end-users and escalate issues to higher-level engineers when necessary.
• Document network problems and resolutions for future reference.
• Basic and/or Intermediatory skill in switches, routers or f5
• Basic and/or Intermediatory skill in Firewalls eg Fortinet, Checkpoint and/or Palo Alto

Security Management

• Adherence to all clients Security and Cyber hygiene policies.
  Respond to security audits and vulnerability assessments.
• Part of the 24x7 rotational standby to support all clients 24x7 ensuring meeting SLA.
• Respond to network and security incidents.
• Participate in incident response drills and post-incident reviews.
• Follow all processes, including timely escalation to senior engineers.

Documentation and Reporting

• Conduct and maintain accurate and up to date Preventive Maintenance report where contractually obligated.
• Daily regular accurate update of incident tickets.
• Collaborate with other engineers to ensure comprehensive documentation of network and security procedures/SOP.

The ideal candidate should possess:

• Diploma /Degree in Computer Science / Computer Engineering / Information Technology related field, or IT equivalent
• Network and security Internship experience or minimally 1 year of related experience or exposure
• Good knowledge network and firewalls
• Self-motivated with a positive “can-do” attitude, creative with excellent presentation, communication, negotiation and interpersonal skills including strong persuasive techniques.
• Ability to develop and maintain respectful and trusting relationship
• Proficient in written and spoken English
• Able to travel as required

We are driven by ourAEIOU beliefs - Adventure, Excellence, Integrity, Ownership, and Unity - and we seek individuals who embody these values in both their professional and personal lives. We arecommitted to our Impact: Valuing our clients, Growing our people, and Creating our future.

Together, wemake the extraordinary happen .

JD-Network security Engineer

• Execute operational tasks for network security solutions, including network firewalls, intrusion prevention systems (IPS), proxies and web application firewalls (WAF).
• Monitor the performance and maintain network security solutions.
• Utilise various tools and solutions to troubleshoot and diagnose network problems.
• Identify and provide insight on WAF violations.
• Post office-hours activation for support and troubleshooting.
• Perform data tabulation and report extraction.
• Configure and install various network devices and services (e.g., routers, switches, firewalls, load balancers, VPN, QoS)
• Perform network maintenance and system upgrades including service packs, patches, hot fixes and security configurations
• Monitor performance and ensure system availability and reliability
• Monitor system resource utilization, trending, and capacity planning
• Provide Level-2/3 support and troubleshooting to resolve issues
• Work within established configuration and change management policies to ensure awareness, approval and success of changes made to the network infrastructure
• Select and implement security tools, policies, and procedures in conjunction with the company’s security team
• Liaise with vendors and other IT personnel for problem resolution
• Handle request and perform necessary network configuration.
• Coordinate the troubleshooting and incident root cause analysis for the managed equipment. It might include troubleshooting with other parties
• Review new release of vulnerabilities and provide recommendation to HDB. It includes obtaining of firmware, schedule and coordinate firmware patching with testers.

Requirements and skills

• Possess knowledge on networking protocols and technologies like TCP/IP, VLANs, VPNs, and routing/switching.
• Possess fundamental application security knowledge like interpretation of HTTP response status codes and WAF violations. Higher proficiency in application security knowledge to advice on remediation measures is an added advantage, but not mandatory.
• Proficient with network equipment from vendors like Palo Alto, Check Point, Trend Micro, Fortinet and F5.
• Experience in solutions that supports the primary job tasks, like Network Performance Monitoring (NPM) and Security Information and Event Management (SIEM).
• Understanding of network security best practices and tools.
• Strong problem-solving skills and ability to work under pressure. Willingness to learn.
• Fundamental skills on Microsoft Office products like Word and Excel.
• Additional certifications like CCNA, CCNP or product (with reference to products listed above) certifications are a plus.

About our team

The Security and IT Operations team serves as the backbone of our secure platforms and services. We are responsible for ensuring seamless day-to-day operations, providing robust support, and safeguarding our large-scale, mission-critical applications. Our focus is on maintaining the availability, performance, and security of our platforms, which support B2C and B2B applications, GP and specialist clinics, medical centers, and offices across Singapore, Vietnam, Thailand, Indonesia, Malaysia, and the Philippines.

About the role

As we expand our healthcare services, we are seeking a Network Security Engineer (an individual contributor role) to support our growing infrastructure. This role will play a crucial part in ensuring the reliability, security, and performance of our IT operations across our medical facilities and offices in the region.

The ideal candidate will have strong network and security expertise and ideally, some experience working with medical and imaging systems (e.g., CMS, PACS, MRI, CT Scan, X-Ray). They will be responsible for maintaining and optimising the infrastructure, ensuring compliance with security policies, and providing hands-on technical support for the healthcare services.

A summary of the key responsibilities is as follows:

• Manage and support IT infrastructure (e.g., servers, VMs, routers, switches, firewalls, WAPs, ISPs, etc) across clinical and on-premise environments, ensuring seamless operations.
• Manage data backup processes and system operations, including user provisioning and access controls.
• Implement and maintain network security, ensuring compliance with industry best practices.
• Troubleshoot and resolve IT and medical device connectivity issues (experience with CMS, PACS, MRI, CT Scan, X-ray etc., is a plus).
• Install, upgrade, and configure hardware and software on laptops and other devices, where required.
• Collaborate with cross-functional teams to support the setup of day surgery and health screening centers.
• Monitor system performance, respond to incidents, and optimise IT operations.
• Work closely with the security teams to ensure compliance with cybersecurity policies.
• Assist in IT audits and regulatory compliance efforts for medical environments, where required.
• Ensure that all data handling, transfer, and processing comply with legal, security, and company guidelines.
• Document IT processes, system configurations, and troubleshooting steps.
• Communicate effectively with business stakeholders, ensuring clarity and alignment on IT, network and security related matters.

About you

• Bachelor's Degree in IT or a related field.
• 3+ years of experience in IT Operations, preferably in a healthcare or highly regulated environment.
• Strong knowledge of networking (firewalls, VPNs, VLANs, Wi-Fi, routing, switching etc.) and cybersecurity best practices.
• Familiarity with medical devices and healthcare IT systems (e.g., CMS, PACS, MRI, CT Scan, X-ray) is an advantage.
• Experience working on Fortigate and Meraki is a plus
• Experience with Windows servers and virtualisation (VMware, Hyper-V).
• Experience working with ticketing systems, preferably Jira.
• Familiarity with tools not limited to Confluence, Bitbucket, Google Workspace, Slack.
• Experience with single sign-on (SSO) systems, with preference for OneLogin.
• Hands-on experience with troubleshooting and supporting enterprise applications.
• Strong analytical and problem-solving skills with the ability to work independently.
• Flexibility to provide support on an ad-hoc basis during weekends, when required.
• A problem-solving mindset and a proactive attitude toward challenges.
• High standards of integrity and professionalism in all aspects of your work.
• A strong desire to learn, grow, and continuously improve in your role.

DRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets around the world. We value autonomy and the ability to quickly pivot to capture opportunities, so we operate using our own capital and trading at our own risk.

Headquartered in Chicago with offices throughout the U.S., Canada, Europe, and Asia, we trade a variety of asset classes including Fixed Income, ETFs, Equities, FX, Commodities and Energy across all major global markets. We have also leveraged our expertise and technology to expand into three non-traditional strategies: real estate, venture capital and cryptoassets.

We operate with respect, curiosity and open minds. The people who thrive here share our belief that it’s not just what we do that matters–it's how we do it. DRW is a place of high expectations, integrity, innovation and a willingness to challenge consensus.

We are seeking a Network Security Engineer to join the network security team to ensure that our infrastructure and networks are properly protected. They will design, coordinate and implement security controls, audit configurations, and design networks in a hybrid compute environment. A successful candidate will have an attention to detail, the ability to understand what impacts their changes have on the network and relevant associated services.

What you’ll be doing:

• Collaborate with cross-functional security, technology, and trading teams to design and deploy innovative solutions that enhance both system integrity and trading performance.
• Actively contribute to the design, implementation, and maintenance of mission-critical trading infrastructure that drives resilient and scalable market operations.
• Implement robust strategies to reduce network risks by leveraging micro-segmentation, port-based security, and other innovative methods.
• Evaluate, diagnose, and implement effective network security solutions such as firewalls, network detect and response, intrusion prevention systems (IPS), and VPN concentrators to improve our network security and ensure reliable remote access.
• Leverage automation, AI, and other emerging and innovative technologies to continuously enhance our ability to detect and respond to security events.
• Perform in-depth analysis of network packet captures to investigate security incidents and identify areas for improvement.
• Continuously seek opportunities to automate tasks and streamline security operations for improved efficiency and effectiveness.

What we’re looking for:

• You are passionate about solving complex problems that enable our company to securely connect from anywhere globally to facilitate new business opportunities.
• You are a network security engineer who thrives on designing, implementing, and supporting cutting-edge security systems that keep our network safe from emerging threats.
• You can get your hands dirty with hands-on experience in firewalls, client VPNs, SASE, NDR, and IDS solutions.
• You enjoy scripting and coding to automate processes and reduce repetitive work.
• You have a solid understanding of TCP, UDP, IP, the OSI Model, and Layer 1-4 & 7 principles and security protocols.
• You are a dedicated professional who isn’t afraid of stepping up for on-call duties—even if it means working nights or weekends.
• You are someone that continuously seeks innovative improvements to drive high-quality, state-of-the-art, and effective security solutions.
• You are an effective communicator, able to translate complex technical insights into clear, actionable strategies that resonate with cross-functional teams.