Senior Quality Engineering · By the Engagement

Independent quality engineering for the products that cannot get recalled.

QESaaS is the senior-engineer review most consumer-product, medical-device, and litigation teams need before launch — productized into fixed-scope engagements that ship the deliverable in days, not quarters. Practitioner-led. Tooling supports the labor; the engineer carries the verdict.

20+ years across medical devices, aerospace, consumer goods
ISO 9001 / 13485 / 14001 / OHSAS 18001 auditor
Fixed scope, fixed price — no hourly, no creep
Practice At a Glance

Productized services. Senior engineering judgment. Engineer-led delivery.

Lead engagement$1,500
Pre-Launch QA Audit turnaround7 days
Worked examples3 case studies
20+ years of recall experienceCFORRS · 20yr
Engineer on every projectMark Mayeux
How QESaaS Works

Three tracks. Nothing else.

A productized senior-engineering practice runs on a small surface area, deliberately. Each of the three tracks below carries the same practitioner-led discipline.

Productized Services

Four fixed-scope, fixed-price services with published deliverable shapes. No discovery phase, no hourly billing, no scope creep.

  • Pre-Launch QA Audit · $1,500 · 7 days
  • ISO Audit Prep · external mock + gap report
  • FDA 483 Response · 30-day structured package
  • Expert Witness · litigation engagements (conflict-checked)
See all services →

Free Tools

Open methodology demonstrations so you can see the deliverable shape before you book a scoping call. No signup. No email capture.

  • Pre-Launch QA Audit Case Studies — three engineer-reviewed reports
  • QA Audit Methodology — 10-point framework, fully published
  • FDA Classification Quick-Check — coming soon
View case studies →

Reference Library

Long-form reference material on the regulatory frameworks consumer-product and medical-device founders run into. Educational, not gated.

  • FDA Device Classification Matrix (DTC products)
  • ISO 10993 Evidence Package Checklist
  • Cp / Cpk Explainer for Founders
  • Industry Pricing Benchmarks
Browse the library →
Frameworks We Cover

The regulations and standards QESaaS engagements address.

Every engagement maps to specific frameworks. Below are the standards QESaaS is calibrated for — covering consumer products, medical devices, and quality management systems across U.S. and international regimes.

ISO 9001:2015
General quality management system — every QESaaS engagement
All Engagements
ISO 13485:2016
Medical device quality systems — Part 820 harmonized
ISO Audit Prep
ISO 14001:2015
Environmental management systems — manufacturing operations
ISO Audit Prep
ISO 10993
Biological evaluation — body-contact / mucosal / implant
Pre-Launch QA
21 CFR 820
FDA Quality System Regulation — medical device
FDA 483 Response
21 CFR 884
FDA OB-GYN device classification (510(k) pathways)
Pre-Launch QA
21 CFR 211
cGMP for finished pharmaceuticals — Quality Unit oversight
FDA 483 Response
FDA 510(k)
Premarket notification pathway — Class II devices
Pre-Launch QA
CPSIA / 16 CFR 1303
Children's product certification + lead surface coatings
Pre-Launch QA
ASTM F963-23
Toy safety — mechanical, small parts, labeling
Pre-Launch QA
UL 4200A
Reese's Law — button-cell battery accessibility
Pre-Launch QA
16 CFR 1610
Flammability of clothing textiles — Class 1 standard
Pre-Launch QA
ANSI Z21.97 / CSA 2.41
Outdoor decorative gas appliances — fire features
Pre-Launch QA
ASTM F2960
Wood-burning chimineas / outdoor fire-pits
Pre-Launch QA
OHSAS 18001
Occupational health & safety management (legacy)
ISO Audit Prep
ASTM F2057
Furniture stability — tip-over hazard testing
Pre-Launch QA
Free Resources

Methodology, tools, and worked examples — open to read before you commit.

No signup. No email capture. The point is for you to see how QESaaS thinks before you decide whether to engage.

Live Tool

Pre-Launch QA Audit Case Studies

Three engineer-reviewed sample reports across consumer-product categories — children's electronics with a battery hazard, medical-adjacent device classification, outdoor fire furniture. See the QESaaS deliverable shape before booking the paid audit.

View case studies →
Methodology

The QA Audit — 10-Point Framework

Full published methodology behind every Pre-Launch QA Audit. Reviewable in advance of any engagement. Practitioner-led reviewer discipline documented in detail.

Read the methodology →
Reference

Reference Library

Long-form explainers on FDA device classification, ISO 10993 evidence packaging, Cp/Cpk for non-statisticians, and consultant-pricing benchmarks. Built up over time, free to read.

Browse the library →
Services

Four productized services. Fixed scope. Fixed price.

Each engagement has a published deliverable shape and a fixed turnaround. No discovery phase, no hourly billing, no surprise add-ons after.

QES-002

ISO Audit Prep

External lead-auditor mock audit + gap report + corrective-action plan for ISO 9001, 13485, or 14001 certification or recertification.

Quote per engagement
Typical 4–8 weeks depending on QMS scope · scoping call to confirm fee
  • Mock audit conducted by ISO auditor
  • Written gap report against the applicable standard
  • Corrective-action plan with owner assignments
  • Pre-audit document review and process walk-through
See ISO Audit Prep details →
QES-003

FDA 483 Response

30-day structured response package for FDA Form 483 observations or Warning Letters — including post-Purolea AI-overreliance citations.

Quote per engagement
30-day delivery from kickoff · structured response per FDA expectations
  • Response document drafted to FDA's stated remediation standard
  • CAPA plan with practitioner-led reviewer discipline
  • Supporting evidence package indexed and cross-referenced
  • Coverage of post-Purolea (April 2026) AI-overreliance citation pattern
See FDA 483 Response details →
QES-004

Expert Witness

Litigation engagements in product liability, recall disputes, and quality-system matters. Conflict-check required before any case material is shared.

Hourly · retainer-based
Conflict-check is no-charge and non-binding · separate engagement letter signed before substantive work
  • Deposition prep, expert report drafting, trial testimony
  • 20+ years across medical device, aerospace, consumer products
  • ISO 9001 / 13485 / 14001 / OHSAS 18001 auditor credentials
  • Written conflict check before any case material reviewed
See Expert Witness details →
The Practitioner

One engineer on every project.

QESaaS is a solo senior practice. No fictional staff, no rotating contractors, no offshore subcontracting. The name on the deliverable is the name doing the work.

MM
About the Practitioner

Mark Mayeux

Quality Engineer · Founder, QESaaS

Twenty-plus years in product quality engineering across three categories where the cost of getting it wrong varies from ruined-your-Tuesday to ruined-your-life: medical devices, aerospace, and consumer goods.

Past supplier-quality auditor inside Chinese contract manufacturers — the same factories most consumer-product brands use today. Past Director of Quality at Anatomy Supply Partners (US/China medical device sourcing) and Scotsman Ice Systems. Built the entire quality department at a medical-equipment startup from scratch — hiring, agency documentation, supplier scoreboards — later acquired.

Also the builder behind RecallSentry™, a published iOS and Android app that monitors federal recall feeds across CPSC, FDA, USDA, and NHTSA. The same daily-running data pipelines power the adjacency check inside every Pre-Launch QA Audit — and every output that lands in a delivered report is authored by Mark.

ISO 9001 Auditor ISO 13485 Auditor ISO 14001 Auditor OHSAS 18001 Auditor Quality & Six Sigma Regulatory Affairs Supplier Quality Auditing Practitioner-Led Engagement

Ready to scope an engagement?

Free 30-minute scoping call. If your project fits a productized engagement, you'll get a one-page brief and an invoice. If it doesn't, we'll tell you why before either side commits.