Security Engineer
Role Overview
As a Security Engineer at Mercor, you'll be responsible for safeguarding systems and data by designing and implementing security controls, monitoring for threats, and embedding security practices into development workflows. This is a senior-level role within a fast-paced team that collaborates closely with engineers to ensure security is integrated into system design. Your work will directly impact how leading AI labs train and test their models, ensuring robust security in a high-scale environment.
Perks & Benefits
Mercor offers a remote work setup, allowing you to work from anywhere while being part of a committed team. The company emphasizes growth, providing opportunities to work on both infrastructure and research-adjacent projects with paths to ownership. You'll gain early insights into frontier AI model capabilities, making a significant impact in the AI field. The culture promotes collaboration and fast-paced innovation, with a focus on balancing security with business speed.
Full Job Description
About Mercor
Mercor is at the intersection of labor markets and AI research. We partner with leading AI labs and enterprises to provide the human intelligence essential to AI development.
Our vast talent network trains frontier AI models in the same way teachers teach students: by sharing knowledge, experience, and context that can't be captured in code alone. Today, more than 30,000 experts in our network collectively earn over $1.5 million a day.
Mercor is creating a new category of work where expertise powers AI advancement. Achieving this requires an ambitious, fast-paced and deeply committed team. You’ll work alongside researchers, operators, and AI companies at the forefront of shaping the systems that are redefining society.
Mercor is a profitable Series C company valued at $10 billion. We work in-person five days a week in our new San Francisco headquarters.
About the Role
As a Security Engineer at Mercor, you’ll own the responsibility of safeguarding our systems, infrastructure, and data. You’ll design and implement defenses, monitor for threats, and ensure security is integrated across the entire development and deployment lifecycle. This role is ideal for someone who thrives in fast-moving environments, can anticipate risks before they materialize, and loves building practical, scalable security systems without slowing down innovation.
What You’ll Work On
Designing and implementing security controls across infrastructure, applications, and networks.
Monitoring for vulnerabilities, threats, and suspicious activity.
Performing penetration tests, vulnerability assessments, and incident response.
Embedding security practices into CI/CD pipelines and development workflows.
Ensuring compliance with frameworks such as SOC 2, ISO 27001, and GDPR.
Partnering with engineers to ensure security is a first-class part of system design.
Researching emerging threats and implementing countermeasures proactively.
What We’re Looking For
Strong knowledge of security principles, tools, and best practices.
Experience with SIEMs, IDS/IPS, firewalls, and vulnerability scanning.
Familiarity with cloud security (AWS, GCP, or Azure).
Solid understanding of encryption, authentication, and authorization systems.
Proven track record of securing distributed, high-scale environments.
Strong collaboration and communication skills.
Ability to balance security rigor with business speed in a hyper-growth environment
Why Mercor
Impact: Your work powers how the world’s leading AI labs train and test their models.
Learning: Get early insights into frontier model capabilities months before the market.
Growth: Work on both infrastructure and research-adjacent projects with fast paths to ownership.
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