About the practice
John-Erik Joost
Quality Assurance & Metrology Consultant
Glattpark Opfikon, Switzerland
John-Erik Joost has spent over fifteen years in the measuring rooms of Swiss and German precision manufacturers, working his way from machinist to head of quality assurance. He programs and validates coordinate measuring machines across every major platform, builds and audits first article inspection reports (EMPB/FAI), and is AUKOM-certified in coordinate metrology. He works independently to give precision manufacturers something the machine vendors cannot: vendor-neutral verification that their measurements actually conform to the standards their drawings reference.
Experience
2023 - present
Okey AG · Winterthur, CH
Head of Quality Assurance / QM
- Lead the quality assurance team and coordinate QA workflows, including a new measuring-room concept.
- Handle customer and supplier deviations and non-conformities in the ERP system.
- Create and optimise CMM and laser measuring programs; release first samples across all components.
- Calculate metrology-relevant gear dimensions with KISSsoft and support production on measurement questions.
2017 - 2023
Leica Geosystems AG (BU Polymeca) · Heerbrugg, CH
Metrology Technician / Programmer
- Planned inspection processes for first articles together with project leads, production and customers.
- Wrote CMM programs via teach-in, offline and CAD, and designed the associated measuring fixtures.
- Created and evaluated EMPB / FAI reports and ran measurement reconciliation with customers and suppliers.
- Implemented SPC evaluation into existing measuring programs and developed multi-fixture setups.
2010 - 2017
Präwest Präzisionswerkstätten · Bremen, DE
Quality & Metrology Technician / Programmer
- Programmed, developed and tested measuring programs with full documentation; created BladePro specifications.
- Coordinated a four-person team and the inspection route from incoming goods to delivery.
- Produced first article inspection reports and work instructions in line with customer specifications.
Areas of expertise
Coordinate measuring machines
- Leitz (Quindos 7 & 2021)
- Zeiss (UMESS, Calypso)
- Mitutoyo (MCOSMOS, CAD1000, GEARPAK)
Form, contour & surface metrology
- Mahr Precimar ULM 520, Marform MMQ 400, MarSurf UD 130
- Zeiss Surfcom 1900, GFM MicroCAD
- Tesa Visio 300 vision system
Methods & documentation
- EMPB / FAI reports per VDI
- GD&T (form and position tolerances), SPC
- Measuring fixture design, work instructions / NCAs
- Gear metrology with KISSsoft, BladePro evaluation
Systems
- SAP / ERP part management
- AutoCAD, Medusa
- Markator marking, PowerMARK laser marking
Certifications & training
- AUKOM Level 1 (CMM Operator, 2019) and Level 2 (CMM User, 2021), both with examination
- Geometrical tolerancing / GD&T - Hexagon Metrology (2019), University of Bremen (2013)
- Zeiss Calypso programming; Mitutoyo MCOSMOS & CAT1000P (2025)
- Gleason Gear School - gear technology (2024); I++ Simulator - Hexagon (2020)
Education
- Diploma in Business Administration HF - NextLevel Höhere Fachschulen, CH (2025-2028, in progress)
- Mechanical Engineering / Informatics studies - FH Wilhelmshaven, DE
- Apprenticeship as machinist - completed with distinction
Languages
Hobbies
Building CNC machines
Designs and builds small multi-axis CNC milling machines at home, from the aluminium frame to the Mach3 control and the G-code generated in AutoCAD.
3D printing
Designs and prints functional parts on self-built and desktop 3D printers, prototyping fixtures and components for his own machines.
Awards & recognition
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