Security AI / ML Engineer, Lead

Toyota North America; Plano (TX); On-site; USD 150,000 - 210,000; Full time

Benefits offered by this job

Health care

Tuition reimbursement

401(k) plan

Paid holidays

Relocation assistance

Job summary

Toyota North America is seeking an ML/AI Security Lead in Plano, TX to own the intelligence layer of a new AI-powered security platform. You will design prompt engineering, build data pipelines, and fine-tune enterprise security models for accurate alert triage and cost-efficient routing.

You will collaborate with the Security Intelligence Engineering team, implement feedback loops, and monitor models in production to sustain performance and reliability.

Qualifications

• 3+ years in applied ML/AI engineering with production deployment.
• Hands-on LLM fine-tuning (LoRA/QLoRA) on domain data.
• Experience with cloud ML platforms for training, tuning, and endpoints.
• Proficiency in PyTorch and production-grade Python.
• Ability to design evaluation pipelines and report results clearly.
• Understanding of transformer architectures and attention mechanisms.
• Strong communication skills to explain model behavior to non-ML stakeholders.

Responsibilities

• Design prompt engineering patterns for managed AI services.
• Build data pipelines from security data lakes for labeling and versioning.
• Fine-tune models on enterprise security data for alert triage and risk scoring.
• Implement analyst feedback loops to improve model accuracy over time
• Develop model evaluation frameworks with robust metrics and benchmarking.
• Create a model routing layer to optimize latency, complexity and cost.
• Monitor production models for drift and failure modes.
• Implement centralized token usage monitoring for leadership visibility.
• Collaborate with the Lead Engineer on agent architectures and multi-agent workflows.
• Deploy and manage model inference endpoints across cloud ML services.

Skills

ML/AI engineering

LLM fine-tuning

AWS SageMaker

PyTorch

Model evaluation

Python production

Transformer basics

Communicating results

Tools

AWS SageMaker

PyTorch

Triton Inference Server

Hugging Face PEFT

Vector databases

Job description

Who we are

Collaborative. Respectful. A place to dream and do. These are just a few words that describe what life is like at Toyota. As one of the world’s most admired brands, Toyota is growing and leading the future of mobility through innovative, high-quality solutions designed to enhance lives and delight those we serve. We’re looking for talented team members who want to Dream. Do. Grow. with us.

Overview

An important part of the Toyota family is Toyota Financial Services (TFS), the finance and insurance brand for Toyota and Lexus in North America. While TFS is a separate business entity, it is an essential part of this world-changing company- delivering on Toyota's vision to move people beyond what's possible. At TFS, you will help create best-in-class customer experience in an innovative, collaborative environment.

Who We're Looking For

Toyota Financial Services (TFS) Technology team is looking for a highly motivated person to fill a role as an ML/AI Security Lead within the Security Intelligence Engineering organization. You'll own the intelligence layer of a new AI-powered security platform — starting with prompt engineering and managed AI service integration, then progressing to fine-tuning models on enterprise security data, and building a multi-model serving and routing layer. This role is what makes the organization own its intelligence rather than renting it from a vendor. You'll train models that understand the specific security environment, build the feedback loops that make them better over time, and ensure the AI layer delivers high accuracy on alert triage while keeping costs predictable through intelligent model routing.

What You'll Be Doing

• Design and implement prompt engineering patterns for managed AI service integration
• Build training data pipelines from the security data lake — curating, labeling, and versioning datasets from real enterprise security telemetry
• Fine-tune models on organization-specific security data — alert triage, risk scoring, finding classification
• Implement the analyst feedback loop — capturing human corrections to continuously improve model accuracy
• Build model evaluation frameworks with rigorous metrics (F1, precision, recall, false positive rates) benchmarked against analyst agreement
• Design and implement a model routing layer — directing each task to the optimal model based on complexity, latency requirements, and cost
• Monitor models in production for drift, accuracy degradation, and emerging failure modes
• Implement centralized token usage monitoring for leadership visibility into AI consumption and cost control
• Collaborate with the Lead Engineer on agent architectures — multi-agent orchestration, tool use, and autonomous triage workflows
• Deploy and manage model inference endpoints across cloud ML services and container-based serving
• Build the analyst feedback loop: approval/rejection signals in dashboards feeding back into retraining pipelines

What you bring

• 3+ years in applied ML/AI engineering (not research-only — production deployment required)
• Hands-on experience with LLM fine-tuning — LoRA, QLoRA, or full fine-tuning on domain-specific data
• Experience with cloud ML platforms (e.g., AWS SageMaker): training jobs, hyperparameter tuning, model registry, endpoint deployment
• PyTorch proficiency for model training and custom architecture
• Experience building evaluation pipelines — automated metrics, human evaluation protocols, A/B testing
• Understanding of transformer architectures and attention mechanisms (not just API calls)
• Python fluency with production engineering practices (testing, CI/CD, monitoring)
• Strong communication skills with the ability to explain model behavior and limitations to non-ML stakeholders

Added bonus if you have

• Experience with security or cybersecurity data — alert classification, threat detection, anomaly detection
• Familiarity with model serving at scale (vLLM, Triton Inference Server, Tensor RT optimization)
• Hugging Face Ecosystem Experience Model Hub, tokenizers, datasets library, PEFT
• Experience with RAG architecture and vector databases
• Background in multi-model routing or mixture-of-experts approaches
• Understanding of agentic AI patterns — tool use, chain-of-thought, multi-step reasoning
• Experience with model cost optimization — quantization, distillation, caching strategies
• Self-motivated individual who thrives in ambiguous environments and can build processes from the ground up

What We’ll Bring

During your interview process, our team can fill you in on all the details of our industry-leading benefits and career development opportunities. A few highlights include:

• A work environment built on teamwork, flexibility, and respect
• Professional growth and development programs to help advance your career, as well as tuition reimbursement
• Team Member Vehicle Purchase Discount
• Toyota Team Member Lease Vehicle Program (if applicable)
• Comprehensive health care and wellness plans for your entire family
• Toyota 401(k) Savings Plan featuring a company match, as well as an annual retirement contribution from Toyota regardless of whether you contribute (if applicable)
• Paid holidays and paid time off
• Referral services related to prenatal services, adoption, childcare, schools and more
• Tax Advantaged Accounts (Health Savings Account, Health Care FSA, Dependent Care FSA)
• Relocation assistance (if applicable)

Belonging at Toyota

Our success begins and ends with our people. We embrace all perspectives and value unique human experiences. Respect for all is our North Star.

Applicants for our positions are considered without regard to race, ethnicity, national origin, sex, sexual orientation, gender identity or expression, age, disability, religion, military or veteran status, or any other characteristics protected by law.

Have a question, need assistance with your application or do you require any special accommodations?