Lead Application & Cloud Infrastructure Security Engineer

Thoughtworks Inc.; Singapore; Hybrid; SGD 180,000 - 240,000; Full time

Benefits offered by this job

Security training programs

Flexible learning & growth

Collaborative culture

Job summary

Thoughtworks is seeking a Lead Security Engineer to guide enterprise security architecture across software delivery teams in Singapore. You will embed security into the SDLC, drive DevSecOps practices, and coach cross-functional groups to balance risk with delivery velocity.

You’ll lead threat modeling sessions, oversee IAM and container security, and ensure compliance with ISO 27001, SOC 2, PCI-DSS, in multi-cloud environments. A citizen/permanent resident of Singapore is required.

Qualifications

• 7+ years in information security engineering or cloud security in fast-paced software delivery environments.
• Expertise in threat modeling methodologies (e.g., STRIDE, PASTA) and standards (OWASP Top 10, SANS Top 25).
• Hands-on with security automation tools (SAST, DAST, IAST, SCA, secrets scanners) integrated into CI/CD pipelines.
• Security in cloud platforms (AWS, Azure, GCP), containers (Kubernetes, Docker) and IaC.
• Knowledge of regulatory frameworks (SOC 2, ISO 27001, PCI-DSS, GDPR) and risk-based governance.

Responsibilities

• Lead the design and implementation of enterprise security architectures, zero-trust patterns, and DevSecOps controls across software delivery teams.
• Act as a primary technical advisor to client stakeholders and engineering leads, aligning information security with business goals.
• Champion shifting security left by embedding automated SAST/DAST/IAST into CI/CD pipelines.
• Conduct threat modeling, security risk assessments, and architectural reviews to mitigate vulnerabilities.
• Oversee cloud platform security governance, IAM, container security, and IaC compliance across AWS/Azure/GCP.
• Guide vulnerability management, incident response, and audit readiness for regulatory alignment.
• Collaborate with cross-functional teams to balance security controls with delivery velocity and quality.
• Mentor engineers, support capability development, and contribute to Thoughtworks' security community of practice.

Skills

InfoSec engineering

Threat modeling

Secure SDLC

Cloud security

IAM & zero-trust

Regulatory compliance

Leadership / mentoring

Tools

SAST tools

DAST tools

SCA

IaC security

Kubernetes security

Job description

Lead Engineers at Thoughtworks act as trusted technical leaders and security advisors who align enterprise risk and executive strategy with modern software delivery, ensuring security measures enhance organizational objectives.

In this role, you bring a strategic and proactive mindset to client engagements, guiding delivery teams in embedding security directly into the software development lifecycle, platform architecture, and cloud environments.

You balance high-level security architecture with hands-on engineering, conducting threat modeling, establishing DevSecOps practices, and following a pragmatic and robust approach to risk management.

As a technical leader, you guide and coach cross-functional teams, cultivate security awareness across accounts, and navigate complex stakeholder environments to build resilient, trustworthy software solutions.

Due to the nature of the projects and specific client security clearance , this role requires the successful candidate to be a Singapore Citizen Or Singapore Permanent residents.

Job Responsibilities

• You will lead the design and implementation of enterprise security architectures, zero-trust patterns, and DevSecOps practices and controls across software delivery teams.
• You will act as a primary technical advisor to client stakeholders and engineering leads, aligning information security strategies with enterprise risk tolerances and business goals.
• You will champion shifting security left in the software development lifecycle by integrating automated SAST, DAST, SCA, and secrets management into CI/CD pipelines.
• You will conduct threat modeling sessions, security risk assessments, and architectural reviews to identify vulnerabilities and design pragmatic mitigations alongside delivery teams.
• You will oversee cloud platform security governance, Identity and Access Management (IAM), container security (Kubernetes, Docker), and Infrastructure as Code (IaC) compliance across AWS, Azure, or GCP.
• You will guide vulnerability management, security incident response workflows, and audit readiness to ensure alignment with industry regulations and public sector standards (e.g., Singapore IM8 / IM8+, SOC 2, ISO 27001, NIST).
• You will partner closely with cross-functional teams—including software developers, infrastructure engineers, quality analysts, and product managers to balance security controls with delivery velocity.
• You will cultivate Thoughtworker growth and development by mentoring engineers, providing ongoing supportive feedback, and fostering an inclusive team culture.
• You will apply the latest technology thinking and security insights from our Technology Radar to solve complex client security challenges.
• You will contribute to Thoughtworks’ security community of practice, supporting pre-sales pursuits, capability development, and technical thought leadership.

Professional Skills

• You bring 7+ years of experience in information security engineering, application security, or cloud security within fast-paced software delivery environments.
• You possess deep expertise in secure software development practices, threat modeling methodologies (e.g., STRIDE, PASTA), and security standards such as OWASP Top 10 and SANS Top 25.
• You have hands-on experience with security automation tools (SAST, DAST, IAST, SCA, secrets scanners) and integrating them into continuous integration and continuous delivery pipelines.
• You bring strong technical capabilities in securing cloud infrastructure (AWS, Azure, GCP), container platforms (Kubernetes, Docker), and Infrastructure as Code (IaC) environments.
• You have a solid foundation in cryptography, Identity and Access Management (IAM), zero-trust architecture, network security, and API security.
• You possess practical knowledge of regulatory frameworks and compliance standards, such as Singapore Public Sector IM8 / IM8+, SOC 2, ISO 27001 (ISMS), PCI-DSS, or GDPR.
• You are a natural mentor and technical leader, skilled at inspiring cross-functional teams, driving security awareness, and coaching peers.
• You demonstrate excellent communication and stakeholder management skills, with a proven ability to translate complex security risks into actionable business decisions for leadership.
• You are resilient in ambiguous situations, capable of evaluating trade-offs under constraints and solving security challenges from technical and business perspectives.
• You bring an open and thoughtful mindset toward AI, exploring AI-assisted security automation, threat detection, and responsible AI governance practices.

Learning and Development

There is no one-size-fits-all career path at Thoughtworks: However you want to develop your career is entirely up to you. But we also balance autonomy with the strength of our cultivation culture. This means your career is supported by interactive tools, numerous development programs and teammates who want to help you grow. We see value in helping each other be our best and that extends to empowering our employees in their career journeys.

About Thoughtworks

Thoughtworks is a dynamic and inclusive community of bright and supportive colleagues who are revolutionizing tech. As a leading technology consultancy, we’re pushing boundaries through our purposeful and impactful work. For 30+ years, we’ve delivered extraordinary impact together with our clients by helping them solve complex business problems with technology as the differentiator. Bring your brilliant expertise and commitment for continuous learning to Thoughtworks. Together, let’s be extraordinary.