US Signal is a leading data center services provider, offering secure, reliable network, cloud hosting, colocation, data protection, and disaster recovery services — all powered by its expansive, robust fiber network. US Signal also helps customers optimize their IT resources through the provision of managed services and professional services.

The Principal AI & Data Engineer owns the data architecture that makes AI work at enterprise scale — from semantic layer design and warehouse rationalization through production LLM deployments, RAG pipelines, and multi-agent automation. This is a principal-level IC role with real architectural ownership, not a support function. US Signal runs an expansive fiber and data center network across the Midwest. You'll work with real operational and customer data and build the systems that make it accessible and actionable across the business. 

What you will own:

• Assess and rationalize the enterprise data warehouse; design and implement a governed semantic layer using dbt 
• Design and deploy production LLM applications on the org's data fabric — prompt engineering, model integration, shipped systems
•  Build text-to-SQL and natural language interfaces that let business users query operational data through conversational AI
• Architect RAG pipelines end-to-end: vector store design, chunking strategy, embedding model selection, internal and customer-facing deployment
• Engineer and orchestrate multi-agent systems for enterprise workflow automation, including framework selection and API integration   

 What you bring to the team: 

• Deep proficiency with LLM frameworks (e.g., LangChain, LlamaIndex), agentic architectures, and RAG pipeline design, including vector databases, embedding models, and retrieval optimization.
• Strong Python fluency with practical experience across the modern data stack, including data warehousing platforms, orchestration tooling, and semantic layer frameworks such as dbt.
• Proven ability to own and deliver end-to-end production systems independently, with evidence of technical leadership and accountability for architecture decisions in fast-paced environments.

 Competencies: 

• Be Reliable: Dependability, Execution, Time Management
• Act Like an Owner: Accountability, Leadership, Business Acumen
• Know the Mission: Mission Alignment, Strategic Awareness

Experience:

• 8+ Years Experience applying machine learning and AI in production environments, with a demonstrated track record of shipping scalable, reliable systems beyond the prototype stage.

What We Offer:

In return for your hard work and commitment, you will enjoy a supportive and inclusive workplace, along with the following benefits:

• Generous paid time off policy, including vacation and 10 paid holidays
• Competitive and comprehensive medical, dental, and vision benefits plans with Flexible Spending benefits including medical/dental expenses and dependent care
• 401(k) retirement plan with a generous contribution
• Group Term Life Insurance covered 100% by employer
• Wellness Incentive to promote overall employee well-being
• Paid volunteer time
• Business casual dress code

Salary Range Disclosure: 

The anticipated base salary range for this position is $150,000 – $200,000 per year, depending on location, skills, experience, and other job-related factors. This role is also eligible for an annual performance-based bonus and participation in US Signal’s comprehensive benefits programs.

Actual compensation will be determined based on a variety of factors, including but not limited to candidate qualifications, experience, geographic location, and internal equity. 

Working Conditions and Physical Demands:

This position may be performed in either a standard office setting or a home office environment. It requires prolonged periods of sitting, frequent use of a computer and other office equipment, and effective time management in a self-directed work environment. Occasional lifting of items up to 25 pounds may be required.

All US Signal employees will comply with US Signal Information Security policies to ensure the confidentiality, integrity, and availability of US Signal and customer data. All employees are responsible to ensure actions comply with state and federal regulations and requirements.

We are interested in every qualified candidate who is eligible to work in the United States. However, we are not able to sponsor visas at this time.

US Signal is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.