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About the Role

ACV is seeking a Principal Architect, Product Security to secure the development and deployment of AI systems within our marketplace. You will define the security architecture and standards for machine learning and LLM-powered systems, guiding high-risk designs and ensuring the protection of sensitive data.

Responsibilities

Actively and consistently support all efforts to simplify and enhance the customer experience.
Define ACV's target-state secure architecture and reference patterns for AI/ML systems, including LLM features, retrieval pipelines, agentic workflows, and computer vision models.
Protect the integrity of ACV's vision-based condition and pricing pipeline against adversarial inputs and manipulated or AI-generated imagery.
Set secure-by-default standards for AI development, including prompt injection defense, output handling, tool and agent permissioning, and model and training-data supply chain security.
Threat model and review high-risk AI and application designs using frameworks like MITRE ATLAS and OWASP Top 10 for LLM and Agentic Applications.
Own the security architecture for AI-assisted engineering, including coding assistants, MCP servers, and autonomous agents, while preserving developer velocity.
Establish ACV's AI security testing capability, including adversarial testing, red-teaming, evaluation harnesses, and runtime guardrails.
Advise leadership on multi-year AI security strategy and partner with AI governance to translate policy into technical controls.
Scale AI security expertise across engineering through programs like Security Champions, mentor engineers, and represent ACV's AI security architecture externally.
Perform additional duties as assigned.

Requirements

Ability to read, write, speak and understand English.
Bachelor's degree in a related field, or commensurate experience.
12+ years of security experience, or 15+ years without a degree, including deep application security architecture.
Hands-on GenAI/LLM security work required, demonstrated through production experience or a verifiable body of work.
2+ years of production AI security experience preferred.
Security architecture: owns the enterprise secure-architecture vision for AI systems and application security.
AI/ML security depth: LLM application threats and model-level threats.
Hands-on technical fluency: reads and writes code (Python preferred) and has personally used AI security tooling.
Frameworks: working fluency with OWASP Top 10 for LLM Applications, OWASP Top 10 for Agentic Applications, MITRE ATLAS, and NIST AI RMF.
Standards and patterns: defines reference architectures and paved-road standards, including for AI-assisted development.
Influence: aligns engineering and ML leadership to the target architecture.
Application security: OWASP Top 10, secure code review, threat modeling, and SAST/DAST/SCA tooling.
Cloud security: cloud-native security on AWS, Kubernetes, and infrastructure-as-code; familiarity with ML platforms and inference infrastructure is a plus.
Comfort working in a fast-paced, cloud-native environment with clear written and verbal communication.
Illustrative credentials (a plus, not required): SABSA or equivalent architecture credentials, CCSP or a cloud security specialty.
No immigration or work visa sponsorship provided for this position.

Skills

GenAI/LLM security
AI red-teaming
AI security tooling
Python
OWASP Top 10 for LLM Applications
OWASP Top 10 for Agentic Applications
MITRE ATLAS
NIST AI RMF
Reference architectures
Paved-road standards
AI-assisted development
Application security
Secure code review
Threat modeling
SAST/DAST/SCA tooling
AWS
Kubernetes
Infrastructure-as-code
ML platforms
Inference infrastructure

Experience Level

12+ years' of security experience
15+ years' without degree
2+ years of production AI security experience preferred

Education Level

Bachelor's degree in a related field, or commensurate experience

Salary/Compensations

The compensation range for this position is listed in the "Job Details" section at the bottom of this posting. Please note that final compensation will be determined based upon the applicant's relevant experience, skillset, location, business needs, market demands, and other factors as permitted by law.

Benefits

Company Sponsored (paid) Healthcare, Dental, Vision, Life/AD&D, Short-Term and Long-Term Disability.
Comprehensive additional optional benefits such Critical Illness and Supplemental Life/AD&D.
All insurance benefits go into effect on your date of hire.
Generous Parental Leave Top-Up Pay and Vacation Programs.
Employee Stock Purchase Program with additional opportunities to earn stock in the company.
Retirement planning through the Company’s RRSP.

About the Company

ACV is a technology company that has revolutionized how dealers buy and sell cars online, transforming the automotive industry.
ACV Auctions Inc. (ACV) has applied innovation and user-designed, data driven applications and solutions.
We are building the most trusted and efficient digital marketplace with data solutions for sourcing, selling and managing used vehicles with transparency and comprehensive insights.
We are disruptors of the industry.
Our network of brands include ACV Auctions, ACV Transportation, ClearCar, MAX Digital and ACV Capital within its Marketplace Products, as well as, True360 and Data Services.
At ACV we focus on the Health, Physical, Financial, Social and Emotional Wellness of our Teammates.

Equal Opportunity

At ACV, we are committed to an inclusive culture in which every individual is welcomed and empowered to celebrate their true selves.
We achieve this by fostering a work environment of acceptance and understanding that is free from discrimination.
ACV is committed to being an equal opportunity employer regardless of sex, race, creed, color, religion, marital status, national origin, age, pregnancy, sexual orientation, gender, gender identity, gender expression, genetic information, disability, military status, status as a veteran, or any other protected characteristic.
We also consider qualified applicants regardless of criminal histories, consistent with legal requirements.
If you have a disability or special need that requires reasonable accommodation, please let us know.