Working group chairs

The PDF Association's various communities serve the entire industry with technical and marketing resources that benefit all members.

The chairs of the various Technical, Marketing and Liaison working groups are industry professionals dedicated to the proposition that a rising tide lifts all boats.

By promoting and enabling broad-based industry activities such as the development of best practice guides and test suites, the PDF Association's working group chairs are the heart of the organization.


Bernd Wild

Dr. Bernd Wild is originally a graduate physicist. After completing his studies, he worked for several years at a computer science …




Roman Toda

Roman is first and foremost a software developer. C++ expert with more than 20 years of experience with PDF. He’s …




Boris Doubrov

Boris Doubrov is CEO of Dual Lab, the company specializing in product development services in the areas of Computer Graphics, …




Dietrich von Seggern

Dietrich von Seggern received his degree as a printing engineer, and in 1991 started his professional career as head of desktop …




Martin Bailey

Martin Bailey has worked on PDF subset standards since 1994, starting with PDF/X in CGATS and then in ISO. He’s …




Phil Spreier

Phil is an entrepreneur and consultant with a background in 3D software, specializing in solid modeling and data translation. He …




Paul Rayius

In addition to his expertise with the CommonLook suite of tools for testing, creating and remediating PDFs, he is also …




Duff Johnson

Duff serves the PDF industry as ISO Project co-Leader and US TAG chair for both ISO 32000 (the PDF specification) and …




Leonard Rosenthol

Leonard Rosenthol is the Senior Principal Architect for PDF & the Document Cloud at Adobe, having been involved with PDF …




Patrick Scouten

Patrick has over seven years’ experience as a PDF Remediation expert and three years in a management role of a …




Matthew Hardy

Matthew first started working with PDF technology in 1999, investigating document semantics in PDF as part of his PhD research, …




Klaas Posselt

Klaas Posselt is a graduate engineer in printing and media technology who, following a number of lines of inquiry, eventually …




Peter Wyatt

Peter Wyatt is an independent technology consultant with deep file format and parsing expertise, who is a developer and researcher …



Rene Rebe
Boris Doubrov
Matthew Hardy
Matt Kuznicki
Leonard Rosenthol
Phil Spreier
Robert Blatt
Owen Ambur
Stephen Levenson
Bernd Wild
Dietrich von Seggern
Roman Toda
Martin Bailey
Peter Wyatt

Patrick Scouten

Patrick has over seven years’ experience as a PDF Remediation expert and three years in a management role of a …

Paul Rayius

Paul Rayius

In addition to his expertise with the CommonLook suite of tools for testing, creating and remediating PDFs, he is also …

Roman Toda

Roman Toda

Roman is first and foremost a software developer. C++ expert with more than 20 years of experience with PDF. He’s …


Phil Spreier

Phil is an entrepreneur and consultant with a background in 3D software, specializing in solid modeling and data translation. He …

Peter Wyatt

Peter Wyatt

Peter Wyatt is an independent technology consultant with deep file format and parsing expertise, who is a developer and researcher …

Boris Doubrov

Boris Doubrov

Boris Doubrov is CEO of Dual Lab, the company specializing in product development services in the areas of Computer Graphics, …


Klaas Posselt

Klaas Posselt is a graduate engineer in printing and media technology who, following a number of lines of inquiry, eventually …


Martin Bailey

Martin Bailey has worked on PDF subset standards since 1994, starting with PDF/X in CGATS and then in ISO. He’s …


Bernd Wild

Dr. Bernd Wild is originally a graduate physicist. After completing his studies, he worked for several years at a computer science …


Matthew Hardy

Matthew first started working with PDF technology in 1999, investigating document semantics in PDF as part of his PhD research, …

Leonard Rosenthol

Leonard Rosenthol

Leonard Rosenthol is the Senior Principal Architect for PDF & the Document Cloud at Adobe, having been involved with PDF …


Dietrich von Seggern

Dietrich von Seggern received his degree as a printing engineer, and in 1991 started his professional career as head of desktop …

Duff Johnson

Duff Johnson

Duff serves the PDF industry as ISO Project co-Leader and US TAG chair for both ISO 32000 (the PDF specification) and …