259 Network Security jobs in Singapore

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 who 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.

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

At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company.

We realize people do not fit into neat boxes. We are looking for curious and empathetic individuals who are committed to developing themselves and learning new skills, and we are ready to help you do that. We cannot complete our mission without building a diverse and inclusive team. We hire the best people based on an evaluation of their potential and support them throughout their time at Cloudflare. Come join us!

The Cloudflare Customer Support Team solves complicated problems and answers technical questions via phone, email, chat and social media. Whether it is a Wordpress blogger using our services for free or a global Enterprise business with petabytes of web traffic, we are always eager to assist. We are the eyes and ears of Cloudflare, acting as the real-time voice of the customer to help communicate their needs and real-world use cases back to the rest of the company - for better service and future product development.

Do you love solving complex technical issues and interacting with people? Are you passionate about providing premium-level support to customers and are a standout colleague? Cloudflare is seeking an experienced Network Security Engineer to join our team and support our largest and most technically sophisticated customers in resolving technical problems, threats or attacks on their infrastructure at OSI Layers 3, 4, and 7. This will span the range of Cloudflare products from Magic Transit Infrastructure Protection, Argo Smart Routing, DDoS mitigation and Network Firewall, to using the Web Application firewall (WAF), Spectrum and Rate Limiting to help customers.

• Serve as a trusted technical advisor for our enterprise customers, responding to and resolving inquiries and incidents related to network security and performance, while delivering timely, high-quality and personalized assistance.
• Work directly with customers to diagnose, troubleshoot and resolve complex technical issues involving DDoS mitigation, firewall rules, SSL/TLS, network confirmation, and other security configurations.
• Create and maintain knowledge base articles, technical guides, and troubleshooting documentation for internal and customer use.
• DDoS mitigation for OSI layers 3,4, & 7: advise customers on how to filter malicious traffic using Cloudflare tools like Magic Transit, Network Firewall, WAF, IP reputation lists, packet inspection, blocklisting, allowlisting, and rate limiting
• Work with Engineering and Product teams to improve products and tools

• You have a minimum of 4 years experience working as a Network Security Engineer / Technical Support Engineer / Sr. Support Engineer supporting networking or web security products.
• Exceptional troubleshooting and problem-solving skills, with the ability to simplify complex concepts for customers.
• Strong customer service orientation and communication skills, both written and verbal, fluent in English and preferably a second language like Mandarin, Hindi, Tamil, Korean or Japanese.
• Ability to work independently and collaboratively in a fast-paced, dynamic environment.
• Strong understanding of network protocols, including TCP/IP, DNS, HTTP/S, and BGP, with a particular focus on anycast routing concepts and implementation, as well as tools such as iptables and looking glass.
• Proven experience troubleshooting network connectivity issues, BGP routing, and GRE tunnels, and performing packet capture analysis
• Confident with command line and tools, including curl, dig, traceroute, openssl, git
• Experience in a web development and / or hosting environment such as installing and configuring web servers like Apache, Nginx, Caddy and IIS
• You have worked with PostgreSQL, MySQL, MS SQL, and other database servers
• Bachelor’s degree in Computer Science, Cybersecurity, or a related field (or equivalent experience).
• Relevant certifications such as CISSP, GCIA GCIH, GCFA, GCFE or equivalent.

What Makes Cloudflare Special?

We’re not just a highly ambitious, large-scale technology company. We’re a highly ambitious, large-scale technology company with a soul. Fundamental to our mission to help build a better Internet is protecting the free and open Internet.

Project Galileo : Since 2014, we've equipped more than 2,400 journalism and civil society organizations in 111 countries with powerful tools to defend themselves against attacks that would otherwise censor their work, technology already used by Cloudflare’s enterprise customers--at no cost.

Athenian Project : In 2017, we created the Athenian Project to ensure that state and local governments have the highest level of protection and reliability for free, so that their constituents have access to election information and voter registration. Since the project, we've provided services to more than 425 local government election websites in 33 states.

1.1.1.1 : We released 1.1.1.1 to help fix the foundation of the Internet by building a faster, more secure and privacy-centric public DNS resolver. This is available publicly for everyone to use - it is the first consumer-focused service Cloudflare has ever released. Here’s the deal - we don’t store client IP addresses never, ever. We will continue to abide by our privacy commitment and ensure that no user data is sold to advertisers or used to target consumers.

Sound like something you’d like to be a part of? We’d love to hear from you!

This position may require access to information protected under U.S. export control laws, including the U.S. Export Administration Regulations. Please note that any offer of employment may be conditioned on your authorization to receive software or technology controlled under these U.S. export laws without sponsorship for an export license.

Cloudflare is proud to be an equal opportunity employer. We are committed to providing equal employment opportunity for all people and place great value in both diversity and inclusiveness. All qualified applicants will be considered for employment without regard to their, or any other person's, perceived or actual race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, national origin, ancestry, citizenship, age, physical or mental disability, medical condition, family care status, or any other basis protected by law. We are an AA/Veterans/Disabled Employer.

Cloudflare provides reasonable accommodations to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job. Examples of reasonable accommodations include, but are not limited to, changing the application process, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment. If you require a reasonable accommodation to apply for a job, please contact us via e-mail at or via mail at 101 Townsend St. San Francisco, CA 94107.

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VN13902Network Security EngineerSG-Singapore About Westcon-Comstor Westcon-Comstor (WestconGroup Inc.) is a global technology distributor with worldwide capabilities in Cloud, Global Deployment and Services, and category-leading Security, Unified Communications and Collaboration, Networking and Data Center technology Practices. Combining expert technical and market knowledge with a uniquely collaborative engagement model, the company is transforming technology distribution through its digital and physical products and services delivery.

The company works with its partners to deliver results together through an investment in enablement programs and its associates' dedication to creating an exceptional partner experience. Westcon and Comstor are the company's go-to-market brands, offering customers a strong portfolio of market-leading and emerging vendors. With teams in 110 offices in 70-plus countries across six continents, Westcon-Comstor provides services to more than 170 countries.

We're hiring a Technical Presales Consultant / Network Security Engineer for a top-tier global cybersecurity company. In this role, you'll act as a key technical advisor during the sales process, supporting customers and internal teams with in-depth knowledge of network security solutions—including Juniper technologies. You'll lead technical discussions, run Proof-of-Concepts, and play an integral role in shaping secure, scalable network solutions.

Job Location: Singapore

POSITION DESCRIPTION

The Technical Presales Consultant is responsible for:

• Work closely with the sales and product teams

• Conduct Proof-Of-Concept (POC) and prepare technical proposals

• Conduct solution presentation and workshops

• Provide pre and post-sales support

• Propose and explore new and upcoming technologies in the market

• Perform any other duties as assigned

POSITION REQUIREMENTS

Skills and Experience:

• Diploma or degree in Information Technology, Computer Science, or a related field

• Minimum of 5 years of experience in the IT security sector, with a strong technical background in network engineering and firewall implementation/management
• Proficiency in Juniper security technologies (e.g., SRX firewalls, JunOS, Juniper Security Director ), including configuration, troubleshooting, and optimization
• Familiarity with other security technologies, including firewalls, IDS/IPS
• Solid understanding of networking protocols (TCP/IP, DNS, DHCP) and core principles of network security
• Experience with network monitoring and analysis tools
• Strong knowledge of Security Design Architecture, OSI model, TCP/IP model, and related protocols
• Relevant certifications (e.g., JNCIS-SEC , CCNP Security, CISSP, CISM) are advantageous
• Excellent problem-solving skills and keen attention to detail
• Strong communication skills and a collaborative team-oriented mindset

If this opportunity aligns with your skills and career goals, we encourage you to apply.

EA License: 21C0783

EAP Registration No: R

Job Scope

• 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. It includes obtaining of firmware, schedule and coordinate firmware patching with testers.

Job Requirement

• Minimally 10 years of experience in IT Network
• CCNP Certificate
• Must be expertise in Cisco products, routers, switches
• Must be expertise in network equipment from vendors like Palo Alto, Check Point, Trend Micro, Fortinet and F5.
• Must have working knowledge in networking protocols and technologies like TCP/IP, VLANs, VPNs, and routing/switching.
  Must have application security experience like interpretation of HTTP response status codes and WAF violations.

We regret to inform that only shortlisted candidates will be notified.

EVO Outsourcing Solutions Pte. Ltd.

• RCB No K

Key Responsibilities

Security Implementation & Management

• Deploy, configure, and maintain F5 systems including LTM, WAF, and API modules.
• Implement and manage Azure Cloud security controls, including APIM gateways and Network Security Groups (NSGs).
• Maintain and administer firewall and intrusion prevention systems (e.g., Cisco FTD/FMC or equivalent).
• Monitor and troubleshoot network and security performance issues to ensure continuous protection and availability.

Security Policy & Configuration

• Implement and enforce granular security policies across F5, firewalls, and Azure environments.
• Conduct regular rule base reviews, policy cleanups, and performance optimizations.
• Ensure consistent policy integration and configuration alignment across application delivery and network security platforms.

Documentation & Collaboration

• Maintain accurate network diagrams, configurations, and standard operating procedures (SOPs).
• Work closely with cloud, network, and application teams to align security policies with business and compliance requirements.
• Support security audits, incident investigations, and continuous improvement initiatives.

QualificationsExperience

• 3–5 years of experience in network security or network engineering roles.
• Proven track record in deploying and maintaining F5, Azure security, and firewall solutions.

Technical Skills

• Hands-on experience with F5 BIG-IP platforms (LTM, WAF/ASM, API).
• Strong knowledge of Azure Cloud security, including NSG and APIM.
• Experience with firewall platforms (e.g., Cisco FTD/FMC, Palo Alto, or similar).
• Understanding of network protocols (TCP/IP, DNS, HTTP/S).
• Familiarity with security concepts such as firewalls, IDS/IPS, VPNs, and zero-trust principles.
• Basic knowledge of automation or cloud-native security tools is an advantage.

Preferred Certifications

• Microsoft Certified: Azure Security Engineer Associate
• Cisco Certified Network Professional (CCNP Security)
• F5 Certified Administrator or F5 Certified Technology Specialist (CTS)
• Other relevant certifications such as CISSP or CompTIA Security+

Job Types: Full-time, Contract

Contract length: 12 months

Pay: Up to $8,000.00 per month

Location:

• Singapore (Required)

Job Summary:

The Network Security Engineer is responsible for ensuring high availability, performance, and security of network infrastructure while supporting continuous service delivery to customers. This role involves proactive monitoring, network lifecycle management, incident resolution, and strategic planning to enhance operational efficiency and customer satisfaction.

Key Responsibilities:

• Monitor and maintain core network infrastructure (routers, switches, transmission systems) to ensure optimal performance and uptime.
• Manage network lifecycle activities, including capacity planning, preventive maintenance, migration, and decommissioning.
• Perform risk assessment, POC testing, and strategy planning for network enhancements.
• Handle incident and outage reports, ensuring timely submission of RFOs and monthly reports.
• Support NOC and internal engineering teams to meet SLAs and service delivery targets.
• Maintain accurate documentation and ensure ITSM process compliance.
• Collaborate with Product and Sales teams on new network planning initiatives.

Requirements:

• Bachelor's Degree in Computer Science, Information Systems, or equivalent.
• Minimum 5 years of relevant experience in network operations or engineering.
• Strong analytical, troubleshooting, and communication skills.
• Experience in ISP or large-scale enterprise network environments is an advantage.
• Cisco Certified Network Associate (CCNA) preferred.
• Able to work off-hours when necessary.

Job Scope

• 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. It includes obtaining of firmware, schedule and coordinate firmware patching with testers.

Job Requirement

• Minimally 10 years of experience in IT Network
• CCNP Certificate
• Must be expertise in Cisco products, routers, switches
• Must be expertise in network equipment from vendors like Palo Alto, Check Point, Trend Micro, Fortinet and F5.
• Must have working knowledge in networking protocols and technologies like TCP/IP, VLANs, VPNs, and routing/switching.
• Must have application security experience like interpretation of HTTP response status codes and WAF violations.

Interested candidate please click "APPLY" to begin your job search journey.
We regret to inform that only shortlisted candidates will be notified.

EVO Outsourcing Solutions Pte. Ltd.
• RCB No. K

About the Department

The Cloudflare Customer Support Team solves complicated problems and answers technical questions via phone, email, chat and social media. Whether it is a Wordpress blogger using our services for free or a global Enterprise business with petabytes of web traffic, we are always eager to assist. We are the eyes and ears of Cloudflare, acting as the real-time voice of the customer to help communicate their needs and real-world use cases back to the rest of the company - for better service and future product development.

Network Security Engineers provide premium-level support for Cloudflare’s security products and features. Our largest and most technically sophisticated customers will contact Support for assistance and intelligence in dealing with threats or attacks on their infrastructure at OSI Layers 3, 4, and 7. This will span the range of Cloudflare security products from Magic Transit Infrastructure Protection, DDoS mitigation and Network Firewall, to using the Web Application firewall (WAF), Spectrum and Rate Limiting to help customers.

Network Security Engineers analyse threats, make detailed and informed suggestions for mitigation and may need to implement mitigation strategies directly on behalf of the customer. They will also provide attack reporting beyond Cloudflare’s self-service reports.

• Ability and willingness to work occasional weekends, holidays, and after hours
• Minimum 5 years of experience
• Monitor and react to alerts to identify attacks
• Work with Engineering and Operations teams to mitigate attacks, suggest steps to mitigate, and apply the appropriate mitigation, when applicable
• Work with Engineering and Product teams to improve the products and tools
• Communicate with customers via chat, email, and phone
• Review the latest alerts to determine relevancy and urgency. Create new tracking tickets for alerts that signal an incident and require review or escalation.
• Manage and configure security monitoring tools.
• Compare traffic signatures and attributes including IP addresses, cookie variations, HTTP headers, and JavaScript footprints to determine what is good traffic and what is malicious.
• DDoS mitigation for OSI layers 3,4, & 7: filter malicious traffic using Cloudflare tools like Magic Transit, Network Firewall, WAF, IP reputation lists, packet inspection, blacklisting, whitelisting, and/or rate limiting.

Key skill sets

• Modern internet protocols like UDP, TCP, etc.
• Advanced understanding of iptables
• Knowledge of Cloudflare Security Products & Features
• Technical Support experience
• Great communication skills with high-value VIP customers under attack
• Computer Networking fundamentals
• Command line / Bash shell
• Sysadmin skills (Linux/Mac/Windows) & Programming skills (Python, Ruby, PHP, C, C#, Java, Perl, etc.)
• Security skills and certifications: CISSP, GCIA GCIH, GCFA, GCFE, etc.
• Data analysis
• PCAP analysis
• Calm under pressure