Dipl.-Ing., Dipl.-Wirt.Ing.
Axel Volkmar Jaeger

Axel Jaeger is a German consulting engineer and the former past chairman of the FIDIC Contracts Committee and former past member of the then FIDIC Executive Committee. Axel Jaeger was involved in the drafting of the FIDIC Orange Book, the 1999 FIDIC Rainbow Edition as well as in the FIDIC Gold Book. He has extensive international project experience gained worldwide. Currently he is a special advisor of the FIDIC Contracts Committee. He is a co-author of the book FIDIC for Practitioners and member of the German Dispute Adjudication Assessment Panel. He has received the Louis Pragney award.

Dr. Götz-Sebastian Hök                                              Rechtsanwalt / Lawyer registered at Berlin bar

PHD in Law, University of Göttingen

Sebastian Hök is graduated in Law from Göttingen University and is a German solictor registered at the Berlin Bar. He has extensive international project and commercial experience gained while living and working in Europe, the Middle East, Africa and Asia. For the past 20 years he has been partner and senoir partner of the law firm Dr. Hök, Stieglmeier & Kollegen. Sebastian Hök is acting as arbitrator, adjudicator and legal counsel. He is also a fully accredited FIDIC trainer. Since 1997 until 2017 was a lecturer at Berlin University of Applied Science for construction management law. Since 2009 he is a FIDIC listed Dispute Adjudicator. He has served as a member of DABs in Armenia, Bosnia, Ethiopia, Germany, Kazaksthan, Mali, Mexico, Morrocco, Palestine and Tanzania. Sebastian Hök has written various books and articles in French, English and German on FIDIC forms of contract. He was involved in major projects in Africa, Asia, Europe and South America either as counsel or court expert. He is a co-author of the book FIDIC for Practitioners and member of the German Dispute Adjudication Assessment Panel and former past Chairman of Eurojuris Commission International Litigation. Since 2011 he advises two FIDIC Task Groups as legal advisor. Also he was the former past Chairman of the FIDIC Trainers´ Assessment Panel.

  • 1987 First Legal State Exam, University of Göttingen (Germany)
  • 1991 Second Legal State Exam, Court of Appeal Berlin
  • 1992 Registered German Solicitor (Rechtsanwalt)
  • 1993 PHD in Law, University of Göttingen
  • 2006 VBI Member (German Association of Consulting Engineers)
  • 2006 FIDIC Trainer Accreditation
  • 2009 FIDIC Dispute Adjudicator Assessment + listed at FIDIC President´s List
  • 2009 Lecturer at Berlin University for Applied Science (Master Course ConRem)
  • 2011 -2016 Chairman Assessment Panel for FIDIC trainer accreditation
  • 2014 till today DRBF Country Representative Germany
  • Director International Contract Administration Engineer [Leuphana University, Germany]


C:\fakepath\DSC_8567-640.jpgSebastian at work 


Robert Werth


Robert-Werth.jpgRobert Werth is a Civil and Construction Engineer, experienced in international construction business, he is a FIDIC approved Adjudicator and a FIDIC accredited international Trainer for modules 1 and 2.

Robert Werth has over two decades of international experience gained when working with or on behalf of owners, operators, contractors, lawyers and consulting organisations, on numerous projects throughout Germany, Austria, Slovenia, Croatia, Lithuania, Latvia, Estonia, Russia, Ukraine, Denmark, Serbia, Slovakia, Turkey, Czech Republic, Poland, Malts Cyprus, acting in various capacities, including advocate in pursuit and defence of claims, as an independent expert and/or as appointed Adjudicator in case of disputes.

He serves on FIDIC contracts, such as Red, Yellow, Silver, Gold, Yellow plus operation, Gold Book, White Book, or EPC-Contracts, also Concession-, BOT- or BOOT-agreements and various kinds of tailor made contracts.

Siobhan Fahey

BA BAI LLB(Hons) CEng Dipl.Arb

Siobhan Fahey is a civil engineer operating as conciliator, arbitrator and adjudicator, and specialising in dispute resolution. She is also serving as Chairwoman of the FIDIC TG 9 (Design & Build Subcontract) and a member of the FIDIC Contracts Commitee. She is also a FIDIC approved adjudicator and a FIDIC accredited trainer for modules 1 and 2.


  • 1989 BA, BAI (Hons) Civil/Structural Engineering, Trinity College Dublin
  • 1996 Chartered Member of the Institution of Civil Engineers UK
  • 1997 LLB (Hons) Bachelor of Laws, University of Wolverhampton
  • 2000 Diploma in Arbitration, College of Estate Management Reading
  • 2006 Chartered Member of Engineers Ireland
  • 2007 Fellow of the Chartered Institute of Arbitrators
  • 2009 Chartered Arbitrator with the Chartered Institute of Arbitrators
  • 2009 Registered Consulting Engineer with ACEI
  • 2010 Professional Dispute Board Member of the Dispute Board Federation, Geneva
  • 2011 FIDIC Trainer Accreditation (Module 1)
  • 2013 FIDIC Trainer Accrditation (Module 2)
  • 2012 Member FIDIC Contracts Committee
  • 2015 Lead Draft Person FIDIC Updates
  • 2021 Lecturer at Leuphana University



All listed trainers are welcomed speakers on international conferences such as the FIDIC Users´ Conferences in London, Afica, Middle East and Far East. Axel Jaeger and Sebastian Hök have conducted trainings throughout the world, in particular in Africa, Asia and Europe. Both trainers are fully FIDIC accredited. Siobhan Fahey and Robert Werth have become accredited FIDIC trainers for modules 1 and 2.

Nestor trainers have developed their own training kits and training materials which thy keep updated on a regular basis. All training kits are fully updated abd based upon 2017 FIDIC Conditions and fully taking in account the FIDIC Golden Principles [2019].

Publications - Papers - Books

(Nestor Trainers)

Hök/ Fahey, Observations on the FIDIC Subcontract 2011 - Part 1: a paper on the FIDIC Subcontract for Works published in the International Construction Law Review (ICLR), Volume 32 [2015], Part 3, 325 et seq.
Hök / Fahey, Observations on the FIDIC Construction Subcontract 2011 - Part 2, ICLR 2015, 366 et seq.
Hök, FIDIC Memorandum 2013 zur Vollziehung von vorläufig bindenden DAB Sprüchen mit einem Blick auf die DIS Schiedsgutachtenordnung, ZfBR 2013, 419 ff.
Hök, Dispute Adjudication Boards - The International or Third Dimension, ICLR 2012, 420
Hök, Employer´s Requirements in Design & Build Contracts - A comparative Approach, ICLR 2012, 121
Hök, Einstweilige Vollziehung von Dispute Adjudication Sprüchen durch Schiedsgerichte: Eine Besprechung der Entscheidung des High Court Singapore in Sachen PT Perusahaa Gas Negara vom 20.7.2010, ZfBR 2011, 523 ff.
Hök, Status Quo of DRBs in Germany, DRBF Forum, Vol. 15, Issue 1, 17
Hök, Phantom or effective Dispute Resolution Method?, ICLR 2011, 412
Hök, Zum internationalen baurechtlichen Schiedsgerichtsverfahren im Allgemeinen und nach FIDIC, ZfBR 2011, 107
Hök, Dispute Adjudication: Modethema oder ernsthafte Alternative, ZfBR 2010, 736
Hök & Jaeger, FIDIC Conditions of Contract for Design, Build and Operate Projects, 1st edition 2008, A New Approach, ICLR 2010, 36
Hök, Risiken in Bauverträgen und ihre Handhabung - eine rechtsvergleichende Betrachtung, ZfBR 2009, 515
Hök, Zur Versicherungsdeckung beim Auslandsbau unter Berücksichtigung der FIDIC Verträge und der Contractor´s All Risk Insurance (CAR), VersR 2009, 878
Hök, FIDIC Design, Build & Operate Form, the Gold Book, ZfBR 2009, 213
Hök, Relationship between FIDIC Conditions and Public Procurement Law - Reliability of Tender Documents, ICLR 2009, 23
Hök, Neues europäisches internationales Baurecht, ZfBR 2008, 741
Hök, Zur international privat- und verfahrensrechtlichen Behandlung des Schiedsgutachtens und DAB Spruches, ZfBR 2008, 323
Hök, FIDIC Verträge im Lichte der Unidroit Prinzipien als Vertragsstatut, ZfBR 2008, 115
Hök, Engineer und Dispute Adjudication Board in FIDIC Verträgen: Entwicklung, Grundlagen und rechtliche Einordnung, ZfBR 2007, 416
Hök, Difficulties encountered in the English-French Translation of FIDIC´s Standard Form Contracts, ICLR 2007, 271
Hök, Engineer und Dispute Adjudication Board in FIDIC-Verträgen: Entwicklung, Grundlagen und rechtliche Einordnung, ZfBR 2007, 416
Hök, Dispute Adjudication-Verfahren-Chancen der Streitbeilegung nach angloamerikanischem Muster, ZAP 2007, Fach 5, 191
Hök, Zum Baugrundrisiko in Deutschland mit einem Blick ins Ausland und auf internationale Vertragsmuster, ZfBR 2007, 3
Hök, The FIDIC Red Book, ICLR 2006, 405
Hök, Zum Sitz des Rechtsverhältnisses beim internationalen Bau- und Architektenvertrag, ZfBR 2006, 741
Hök, Zum FIDIC Red Book „harmonised version“ als Variante des FIDIC Red Book 1999 und zu den Weltbank-Standard Bidding Documents Works 2005, ZfBR 2005, 742
Hök, Internationales Vergaberecht der Weltbank für Bau- und Anlagenbau auf der Grundlage von FIDIC und ENAA-Musterverträgen, ZfBR 2004, 731
Hök, Risiken und Sicherheiten im grenzüberschreitenden Geschäft, BauRB 2004, 346
Hök, Überblick über die rechtlichen Grundlagen der Flächenberechnung bei Immobilien im französischen Recht und die Folgen der Nichtbeachtung, GuG 2004, 269
Hök, Vertragsstatut beim Werkvertrag: Reichweite und Wirkungen einer inländischen Vollmacht im Ausland, BauRB 2004, 295 (Urteilsanmerkung)
Hök, HOAI: Preisbindung im Geschäft mit Auslandsberührung, BauRB 2003, 76

Hök, Handbuch des internationalen und ausländischen Baurechts

Handbuch 2. Auflage 2012. Buch. XLIV, 1714 S.: Mit 10 Abbildungen. Gebunden
Springer ISBN 978-3-642-12999-5

Axel Volkmar Jaeger & Götz-Sebastian Hök

This introduction to the 1999 FIDIC forms of contract covers the FIDIC Red, Yellow, Silver and Gold books. Consulting engineers, architects and employers will also find reliable information on the White Book as well as pre-contractual and contractual issues.
Publisher: Springer-Verlag GmbH
Language: Englisch
EAN: 978-3642020995
ISBN-13: 9783642020995