
Global GMP Expertise. Localized Insight. Compliant Results.
Trusted consultancy rooted in EMA, U.S. FDA, and Health Canada GMP regulations — harmonized with ICH, PIC/S, PDA, and ISPE standards.
Regulatory Excellence Across Three Jurisdictions
Comprehensive GMP support aligned with the world’s leading regulatory frameworks.
Navigating EU GMP and Annexes with confidence.
Leverage deep expertise in EudraLex Volume 4, Annex 1, and EU-specific quality and compliance expectations. Ideal for EU-headquartered companies and international firms seeking EU market authorization.
Meeting U.S. FDA 21 CFR compliance, PAI readiness and beyond.
Support tailored to U.S. FDA expectations for both drug and biotech manufacturing, including guidance on inspections, warning letters, and quality system readiness.
GMP compliance with Canadian regulatory precision.
Expertise in Canadian GMPs and alignment with the Food and Drugs Act & Regulations. Especially relevant for companies operating in or exporting to Canada, including biotech and small-molecule manufacturers.
Areas served
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Pharmaceutical Manufacturing
Support for small- and large-molecule drug production, from batch record reviews, inspection readiness, to regulatory submissions and GMP compliance.
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Biotechnology
Biotech-specific QA strategies, tech transfer support, and compliance with evolving standards for ATMPs and biologics.
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Clinical Trial Manufacturing (GMP for IMPs)
Specialized experience with GMP for investigational medicinal products (IMPs), Phase I–III production, and EU Annex 13.
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Contract Development & Manufacturing Organizations (CDMOs)
End-to-end quality and compliance support for CDMOs operating under multiple regulatory frameworks.
Key Services Offered
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Objective: Resolve compliance gaps and recover from regulatory observations or warning letters.
We specialize in helping companies respond effectively to:
FDA Form 483 observations
EMA or Health Canada deficiency letters
Third-party audit findings
Our remediation services include:
Root cause analysis (RCA) aligned with industry best practices
CAPA planning, execution, and effectiveness checks
Documentation clean-up and reconstruction
QMS rebuilding or redesign
Remediation project management and interim QA leadership
Communication strategies for regulators (response letters, updates, milestones)
Whether you’re recovering from an inspection or preparing a proactive remediation plan, we help you regain regulatory confidence — quickly and sustainably.
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Objective: Identify and address compliance gaps before regulators do.
We perform comprehensive internal GMP audits modeled after regulatory inspections (FDA, EMA, Health Canada) and aligned with PIC/S standards. Our audits evaluate:
QMS structure and implementation
SOPs and records
Facility and equipment controls
Personnel training and hygiene
Batch documentation
Data integrity risks
A detailed gap report outlines deficiencies, risk levels, and prioritized corrective actions.
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Objective: Prepare confidently for real inspections.
We simulate regulatory inspections under FDA (PAI, GMP surveillance), EMA (GMP compliance), or Health Canada frameworks. Services include:
Inspection coaching and mock interviews
Readiness assessments for documentation, site conditions, and personnel
Custom inspection playbooks
Risk mitigation plans for known findings
This is ideal before a market authorization application or facility expansion.
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Objective: Build or improve systems that support compliant operations.
We help develop or remediate GMP-compliant SOPs and QMS elements including:
SOP architecture & formatting
Document control systems
Change control procedures
Deviations, CAPAs, and investigations
Quality risk management (ICH Q9)
Training systems
Support includes drafting, revising, and implementing SOPs tailored to your operations — whether for clinical or commercial manufacturing.
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Objective: Build a robust, inspection-ready QMS — from the ground up.
We help implement and validate Quality Management Systems tailored to your product lifecycle stage (clinical, commercial, or tech transfer). Services include:
End-to-end QMS design aligned with ICH Q10, EMA, FDA, and Health Canada GMPs
Selection and configuration of eQMS platforms (MasterControl, Veeva, etc.)
SOP creation and hierarchy mapping
Process validation documentation and strategy
System validation (CSV/CSA) aligned with GAMP 5 and data integrity principles
Training program setup and effectiveness checks
Whether you're a start-up launching GMP operations or an established company overhauling outdated systems, we ensure your QMS is practical, scalable, and compliant.
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Objective: Ensure trustworthy records and regulatory defensibility.
We assess data governance practices using ALCOA+ principles and help implement:
Audit trails and system validations
Secure access control
Paper and electronic record compliance
Logbook reviews and corrections
Procedures for raw data handling and storage
This service is critical in preparation for FDA or EMA inspections focused on data integrity.
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Objective: De-risk your supply chain by ensuring vendor compliance.
We support full lifecycle vendor management including:
Third-party GMP audits
Technical agreements and quality clauses
Vendor qualification packages
Ongoing oversight and scorecards
Remote audit strategies (post-COVID hybrid models)
We help you manage CMOs, CDMOs, API suppliers, labs, and packaging vendors to ensure they meet regulatory expectations.
Why work with Retzlaff Consulting?
Global Standards. Practical Solutions. Trusted Expertise.
At Retzlaff Consulting Inc., we combine deep regulatory knowledge with real-world industry insight to deliver GMP compliance that works — not just on paper, but on your shop floor, in your documentation, and at your next inspection.
Our hands-on experience spans EMA, FDA, and Health Canada frameworks, harmonized with ICH, PIC/S, and global industry standards. Having worked with EU-based global pharma, Indian manufacturers, and Canadian biotech firms, we tailor compliant solutions that align with your operations, scale, and lifecycle stage.
Value. Speed. Reliable.
Martin Lehmann, CPO of Qualifyze
“Marco’s contribution to our understanding of the market and our positioning was invaluable. He brought new perspective and practical insights which helped our business objectives.We appreciate his great energy and positive attitude during our collaboration on several thought provoking projects.”
Paul McNulty, Former U.S. Deputy Attorney General
“If you think compliance is expensive, try non-compliance.”
About Retzlaff Consulting Inc.
Where global GMP expertise meets purpose-driven quality leadership.
Founded by Dr. Marco Retzlaff, Retzlaff Consulting Inc. brings over 15 years of international experience in pharmaceutical and biotech quality assurance. Marco has led GMP and quality initiatives across Europe and North America — from global generics and biosimilars to cutting-edge biologics and clinical-stage startups.
His leadership has included:
Serving as Head of QA Operations for Novartis/Sandoz Germany, overseeing 1,500+ products
Leading an EU QP Release Hub and acting as Wholesaler Responsible Person and Narcotics Officer
Building the GMP framework for a new biotech facility in Canada, including validated QMS infrastructure
Mastering regulatory inspections by FDA, EMA, Health Canada, Swissmedic, AGES, ANVISA, The Russian Health Authorities, and others
Driving remediation and inspection readiness for global sites, often under tight timelines and complex conditions
With a PhD in Biotechnology, certified Lean Six Sigma Green Belt, and experience as a trained European patent attorney, Marco brings a rare blend of scientific depth, regulatory insight, and strategic business alignment.
At the heart of his approach is a commitment to cultivating quality culture — empowering teams, not just systems, to succeed.
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