Assurance & Engineering Services

Driving Sustainable Quality Excellence

Sigma Services embeds seasoned quality professionals into your operations — whether you need hands-on daily support at your plant or high-level engineering leadership at your supplier sites.

Our consultants don’t just troubleshoot issues. We partner with your team to eliminate root causes, strengthen internal systems, and drive lasting improvements that improve compliance, efficiency, and cost performance.

Engagement Options

We offer flexible consulting options tailored to your needs:

  • Short-term coverage during ramp-up, recalls, or resource gaps

  • Long-term embedded roles within your team or supplier base

  • Project-based support for launches, escalations, or improvement initiatives

  • Retainer-based plans for ongoing coverage and support on a no-contract as needed basis

What We Do

Our team brings the tools, expertise, and systems to make your gates perform:

  • Our Quality Assurance Associates work directly within your OEM or supplier quality teams to support and lead key functions, including:

    • Part vs. spec comparisons

    • Setup and communication of quality alerts

    • Dispositioning nonconforming material

    • Interdepartmental issue resolution and liability investigation

    • Escalation meetings and reporting to management

    Whether you need coverage for open roles, reinforcement during audits, or continuous oversight, our QA associates deliver with precision and professionalism.

  • Our Quality Engineers specialize in external supplier support, ensuring your partners meet expectations before, during, and after launch. We lead:

    • Supplier industrialization and process validation

    • APQP, PPAP, and control plan development

    • Line capability studies and Six Sigma analysis

    • Defect prevention and long-term corrective action

    Our engineers act as an extension of your supplier quality team, helping you reduce incoming defects, avoid line disruptions, and improve supplier performance metrics.

“Quality is never an accident; it is always the result of high intention, sincere effort, intelligent direction and skillful execution.”
— John Ruskin