1,244 Network 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 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 .

California residents, please review the California Privacy Notice for information about certain legal rights at .

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Designs, supports, coordinates, controls and operates internal data or voice communication systems or specialized components of a network whether data, voice or video including Local Area Networks (LANs), Wide Area Networks (WANs), and voice systems by conducting such activities as planning, configuring, testing, maintaining, troubleshooting and tuning network infrastructure which might include routers, switches, gateways, firewall systems, multi-function switches, end offices, signalling

SPTel is a joint venture between ST Engineering and SP Group and we are able to leverage the strengths of our parents to provide unique connectivity and digital services for our customers to become the digital services provider of choice. Our network is known for reliability and diversity because our unique fibre pathways combine leased SP Group infrastructure with owned fibre pipes laid alongside the power network cables. Our network structure also ensures your data takes the shortest possible route for optimal performance.

SPTel is a Business Class Digital Services provider that promises:

· Fully digitalised processes, enabling on demand provisioning of services such as Bandwidth and cyber security

· Business Grade connectivity standards that include <1ms ultra low latency performance and clean-pipe connectivity as a default

· True network diversity for improved reliability with unique fibre pathways and facilities that are physically separate from incumbent telcos

· Innovative services such as Quantum Key Distribution-as-a-Service (QKD-a-a-S), IoT-a-a-S and Edge Cloud

We are well recognised in the industry clinchingnumerous awardsfor our cutting-edge telco services and featured on CNA in a documentary “Home-Grown with a Digital Edge” as well as vignette “Securing the Future in the Age of Quantum Computing”.

These accolades and achievements are the result of us meticulously grooming a team of talents and specialists to be part of our exciting journey and we are looking to grow our team. If you are a skilled and driven individual, do join us as co-creators of the future of SPTel.

Job Brief:

We are looking for an Engineer/Senior Engineer who is passionate about security with at least 5 years of experience in network security.

This rewarding role will best suit someone with network experience, and the ability to work closely with our engineers to deliver large scale network security solutions.

Experience working with cyber security and in a CII(Critical Information Infrastructure) environment will be an added advantage.

Responsibilities:

Infrastructure & Network Security

• Protect Telco cloud infrastructure and corporate IT network systems. Be responsible for the implementation and management of security-related applications and systems as system owner.

• Lead to architect, implement, manage and continuously improve security-related systems including but not limited to NGFW, IPS, WAF, Anti-DDoS, AD(Active Directory), TACACS+, PAM, MFA, EDR, EPP/SP, SIEM, ZTNA, and SASE.

• Develop Standard Operational Procedures(SOP), Manual of Procedures(MOP), and operational documentation for service delivery and change requests.

• Lead Proof of Concepts (POC) for emerging security technologies and managed security services (MSS).

• Support the team as Layer 3 technical support for security-related systems issues, SOC alerts, etc.

• Support ISMS and ISO27001 implementation.

Customer Cybersecurity Support

• Evaluate and respond to customer tenders and cybersecurity inquiries, including infrastructure security compliance, managed security services compliance and data privacy compliance.

• Support the Sales and Solution teams in addressing supply chain and third-party cybersecurity requirements.

Incident Response Management

• Support the company’s response to cybersecurity incidents and threats.

• Develop and maintain incident response plans, SOC alert playbooks, cyber incident playbooks and conduct annual cyber table-top exercises and/or simulations.

• Provide incident investigation support to SOC and technical operations teams.

• Monitoring and managing all security breaches and handling security incidents, taking remedial action to prevent recurrence wherever possible.

• Any other ad-hoc duties as assigned by superior from time to time.

Role Requirements:

• Minimum 5 years of experience in cybersecurity.

• Strong understanding of security architecture across network, infrastructure, and endpoint layers.

• Familiarity with security operations, risk assessments, incident management, and customer cybersecurity support.

• Hands-on experience with security technologies (e.g., Firewall, IPS/IDS, WAF, DDoS Protection, AD, PAM, SIEM, EDR, ZTNA).

• Have experience creating design documents (HLD, LLD) diagrams, and presentations.

• Have experience in project management.

• Strategic mindset with strong problem-solving and risk mitigation skills.

• Ability to work cross-functionally with internal teams, auditors, and customers.

• Enjoy working with different stakeholders to achieve desired outcomes.

• Ability to work in a fast-paced environment and multi-tasking.

• Professional Certifications such as in network, security domains and project management will be an advantage.

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.

Join to apply for the Network Security Engineer role at TEKsystems .

We’re looking for a hands-on Network Security Expert to join our team. You'll support daily operations, manage incidents and changes, and work across teams to implement key security solutions.

• Manage and troubleshoot Palo Alto firewalls, F5 load balancers, Zscaler (ZIA/ZPA), and Cisco ISE
• Support Okta integrations (SSO/MFA) and CyberArk for privileged access
• Analyze network/security designs to improve performance and reduce risks
• Work closely with access and infrastructure teams
• Participate in monthly on-call rotation for critical systems

• Experience with Palo Alto, F5 LTM, Zscaler, and Cisco ISE
• Familiar with Okta, CyberArk, and Active Directory
• Strong troubleshooting and documentation skills
• Team player, comfortable in agile environments

• Certifications (e.g., PCNSE, CCNP Security, Zscaler Certified)
• Scripting or automation (Ansible, Terraform)
• Knowledge of IAM, PKI, and certificate-based access

Note: The original job description contained duplicate content and irrelevant sections; these have been removed for clarity and focus.

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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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 .

1. Bachelor's degree in Cybersecurity, Computer Science, or related field
2. 2+ years of experience in information security or cybersecurity
3. Expert knowledge of security technologies (firewalls, EDR, SIEM, IAM, encryption)
4. Strong understanding of common attack vectors and defense strategies
5. Professional certifications preferred (CISSP, CEH, Security+, GIAC certifications)
6. Experience with cloud security (AWS, Azure, GCP) and container security
7. Proficiency in security scripting and automation (Python, PowerShell, Bash)
8. Hands-on experience with vulnerability assessment tools and techniques
9. Strong incident response and threat hunting skills
10. Excellent analytical and problem-solving abilities
11. Strong communication skills and ability to explain security concepts to non-technical stakeholders
12. Experience with compliance frameworks and security standards