• Association of German Jurists (Deutscher Juristentag e.V.)
• German Bar Association's Labour Law Working Group (Arbeitsgemeinschaft Arbeitsrecht im DAV)
• Association of Labour Law Institute (Institut für Arbeitsrecht Berlin und Bochum e.V.)
• German-American Lawyers' Association (Deutsch-Amerikanische Juristen-Vereinigung e.V.)

Publications:

A Sensitive Issue - Remuneration of the Executive Board: Implications of the Scheduled Implementation of the Second Shareholders' Rights Directive and the Re-vision of the German Corporate Governance Code (co-author Oliver Köster); in: Deutscher Anwaltspiegel, issue 09/2019, p. 3

Quotes in "Christmas Bonus - Who Gets It and How Much Is It" ("Wer Anspruch auf Weihnachtsgeld hat – und wie hoch es ausfällt") in: Handelsblatt, 14 Nov 2018;

Prerequisites for Suspension of the Co-Determination Right of the Works Council in the Event of Overtime Ordered Due to Strikes (together with Isabelle Woidy), in: Der Betrieb, 43/2018, p. 2645

Advanced Requirements for Employer's Notification Duty Pursuant to Section 613a (5) no. 3 German Civil Code (BGB) for Transfer of Business in: Der Betrieb, 32/2018, p. 1929

Quoted in article in: Handelsblatt, 24 July 2018, no. 140

What Is the Fair (Works Council) Wage?, in: Der Betrieb, 09/2018, S. M28-M29;

Flexible Staff Assignment within a Group (co-authors Daniel Happ and Marco Tucci); Fachmedien Recht und Wirtschaft, dfv Mediengruppe, Frankfurt/M. 2015;

How to Treat Monthly Flat Wages under the Minimum Wage Act (co-author Josefine Mitius); in: Der Betrieb (DB), volume 3/2015, p. 126 – 131;

How to Treat a Lex Imperfecta (co-author Stefan Schwab); editorial in: Der Betrieb (DB), volume 5/2014;

On Flight Controllers, Apron Staff, Lock Attendants on Strike - When Trade Unions Use Third Parties (co-author Charlotte Sander); in: Neue Zeitschrift für Arbeitsrecht (NZA), volume 7/2014, p. 337 – 342;

Thresholds for Corporate Co-Determination - Where Does Co-determination Begin (co-author Thorsten Reinhard); in: Neue Juristische Wochenschrift (NJW), volume 31/2014, p. 2229 – 2234;

Protection of Confidence in Labour Law and Social Law - Royal Road to Defend Equal Pay Claims and Repayment Decisions Issued by the German Statutory Pension Insurance Institute (DRV)? (co-author Juliane Göhler); in: Recht der Arbeit (RdA), volume 6/2014, p. 299 – 307;

Group Internal Temporary Work - Temporary Confusion; editorial in: Neue Zeitschrift für Arbeitsrecht (NZA), volume 2/2013, p. III;

Few Options for Groups; in: Frankfurter Allgemeine Zeitung (F.A.Z.) dated 6 Feb 2013, p. 19 (Rubrik: „Nachgefragt“);

Severe Limits for Temporary Work – What Remains Available in Practice? (co-author Stefan Schwab); in: Arbeit und Arbeitsrecht (AuA), volume 3/2013, p. 157-160;

Questions Relating to Industrial Relations in Case of Group-wide Staff Assignments (co-author Stefan Schwab); in: NZA-Rechtsprechungsreport Arbeitsrecht (NZA-RR), volume 4/2013, p. 169 – 174;

Immediate Termination Possible; in: Personalmagazin, volume 05/2013, p. 55;

Use the Right Provisions; in: Personalmagazin, volume 08/2013, p. 65 – 67;

Transfer to Another Company of the Group and Co-determination pursuant to Sec. 99 BetrVG (co-author Stefan Schwab); in: Der Betrieb (DB) 2012, p. 1928-1930;

Collective Agreements by CGZP (Christian Trade Union for Agency Work and Personnel Service Agencies) Closely Examined in the Light of Social Law – An Assessment (co-author Lioba Grünberg); in: Der Betrieb (DB) 2012, p. 2868-2871;

Liability at GmbH & Co. KG; in: JURA, volume 2/2007, p. 88-99;

Strike for Collective Social Compensation Plan Permissible; German Federal Labour Court of 24 April 2007 – 1 AZR 252/06 (co-author Markus Kappenhagen); in: Betriebsberater (BB), volume 41/2007, p. 2238-2240;

Conference Report 66th Deutscher Juristentag (Association of German Jurists) – Labour Law Department; in: Juristenzeitung (JZ), volume 5/2007, p. 234-235;

Comments on Sec. 23 TzBfG; in: Annuß/Thüsing, Teilzeit- und Befristungsgesetz; Verlag Recht und Wirtschaft; 2nd edition, Heidelberg 2006;

No Claim to parental leave in case of request which was permissible but sent after begin of parental leave for conflicting operational reasons; German Federal Labour Court of 19 April 2005 – 9 AZR 233/04; in: Betriebsberater (BB), volume 10/2006, p. 558-559;

Equal Treatment Agreements – You Can't Make an Omelette without Breaking Eggs; editorial („Die erste Seite“); in: Betriebsberater (BB), volume 31/2006;

Continued Effectiveness or Replacement of Collective Agreements After Transfer of Business; in: Sutschet (ed.), Tradition und Moderne – Schuldrecht und Arbeitsrecht nach der Schuldrechtsreform;

Festschrift für Horst Ehmann zum 70. Geburtstag; Duncker & Humblot, Berlin 2005, p. 169-235;

Harmonisation or Competition of European Labour Law Regulations? – Suggestion for a Guideline for Services in the Internal Market; in: Europäisches Wirtschafts- und Steuerrecht (EWS), volume 6/2005, p. 251-261;

Shifting Regulation Authorities From Parties of a Collective Agreement to Betriebspartner (Employer and Works Council). Legal Framework in Germany – Examples in Europe; in: Die Mitarbeitervertretung (ZMV), special edition 2003, p. 40-46;

Escaping collective wage agreements. Resignation from Association, Sale of Undertaking, Transfer of Business - A Labour Law Guideline; F.A.Z.-Institut, Frankfurt/M. 2002 (co-author Bernhard Trappehl; commented by Annuß, NZA 2002, p. 318);

Works Agreement Pursuant to Sec. 77 BetrVG; in: Jaeger/Röder/Heckelmann, Praxishandbuch Betriebsverfassungsrecht; C.H. Beck, Munich 2002;

New Questions on Scope of Collective Agreements: Where Employment Agreements Refer to Collective Agreements; in: Thüsing, Tarifautonomie im Wandel – Beiträge zum Tarif-, Arbeitskampf- und Koalitionsrecht; Carl Heymanns Verlag, Cologne 2002 (co-author Gregor Thüsing);

Failings of Implementation of Sec. 14 TzBfG? (co-author Gregor Thüsing); in: Betriebsberater (BB), volume 16/2002, p. 829-832;

Employer's Right to Ask Questions. News on a Classic Subject (co-author Gregor Thüsing); in: Betriebsberater (BB), volume 22/2002, p. 1146-1153;

How Employment Contracts Embrace Collective Agreement Provisions – Resignation from Association, Change of Association, Transfer of Business (co-author Gregor Thüsing); in: Recht der Arbeit (RdA), volume 4/2002, p. 193-213;

Review of General Terms and Conditions in Employment Contracts Regarding Reference Clauses – Drafting a Contract After Reform of the Law of Obligations (co-author Gregor Thüsing); in: Neue Zeitschrift für Ar-beitsrecht (NZA), volume 24/2002, p. 1361-1370;

Sharing Employee Data in Multinational Groups - Data Protection and Works Constitution Law Principles; (co-author Nina Cahlik); in: Recht der Datenverarbeitung (RDV), volume 6/2002, p. 285-297;

Permissibility of varying pensions for employees who resigned early and employees who remain in service until collection of anticipated pension; German Federal Labour Court of 23 January 2001 – 3 AZR 562/99 (co-author Gregor Thüsing); in: Entscheidungen zum Wirtschaftsrecht (EWiR), volume 2/2002, p. 53-54;

Individually Agreed Reference Clause to Collective Agreement When Employer Leaves Association; Federal Labour Court of 26 September 2001 – 4 AZR 544/00; in: Betriebsberater (BB), volume 24/2002, pp. 1267-1269;

Requirements for Proving Collective Subsequent Clauses in the Employment Contract; Federal Labour Court of 23 January 2002 – 4 AZR 56/01; in: Entscheidungssammlung zum Arbeitsrecht (EzA), § 2 NachwG no 3;

"The Right to Terminate Allows No Cherry Picking Pursuant to the Favourability Principle"; in: Frankfurter Allgemeine Zeitung (F.A.Z.) of 9 January 2002, p. 22;

"Employees Must Obtain Information on their Own"; in: Frankfurter Allgemeine Zeitung (F.A.Z.) of 6 November 2002, p. 19;

Works Council Agreement – A Legally Secure Thing; in: Arbeit und Arbeitsrecht (AuA), volume 8/2001, pp. 350-355;

Works Council Election Under New Law (co-author Gregor Thüsing); in: Neue Zeitschrift für Arbeitsrecht (NZA), special edition 2001, pp. 77-92;

Favourability Comparison between Dismissal Regulation in Individual Contractual Provisions and Statutory Provisions; Federal Labour Court of 4 July 2001 – 2 AZR 469/00; in: Entscheidungssammlung zum Arbeitsrecht (EzA), § 622 BGB new version no. 63;

Trade Unions and Works Councils in Germany; in: Baker & McKenzie‘s Worldwide Guide to Trade Unions and Works Councils; CCH Inc., Chicago 2000;

Change for the Worse in Claims from Collective Agreements with "Consolidation Agreement"; Federal Labour Court of 7 January 2000 – 1 AZR 175/00 (co-author Horst Ehmann); in: Arbeitsrechtliche Praxis (AP), no. 14 on § 77 BetrVG 1972;

Consitutionality of Aftereffect Principle of the Federal Labour Court; decision by BVerfG of 3 July 2000 (1 BVR 945/00); in: Frankfurter Allgemeine Zeitung (F.A.Z.) of 14 October 2000, p. 22 (Rubrik: Nachgefragt bei);

Freedom of Collective Bargaining and Undertakings – A contribution to the requirements and limits of collective agreement reservations, particularly the requirement of the employer being subject to a collective agreement; Duncker & Humblot, Berlin 1999 (commented by Hablitzel, NZA 2000, p. 253);

Escaping collective wage agreements into a dead end? co-author Horst Ehmann); in: Juristische Ausbildung (Jura), volume 3/1999, pp. 135-150;

Request for Termination by the Employer After Extraordinary Dismissal? Principle of and Exceptions to sections 9 (1) sentence 2, 13 (1) sentence 3 KSchG (co-author Bernhard Trappehl); in: Recht der Arbeit (RdA), volume 9/1999, pp. 243-251;

Injunctive Relief of the Trade Union – the end of operational "Alliances for Labour"? (co-author Bernhard Trappehl); in: Neue Juristische Wochenschrift (NJW), volume 44/99, pp. 3217-3224;

Company Collective Agreement in Case of Merger: Transfer of Obligations to Acquiring Entity; Federal Labour Court of 24 June 1998 – 4 AZR 208/97 (co-author Bernhard Trappehl); in: Der Betrieb (DB), volume 5/99, pp. 291-292;

"The Freedom of Association Does not Constitute the Right for Associations to Take Legal Actions", (co-author Günther Heckelmann); in: Frankfurter Allgemeine Zeitung (F.A.Z.) of 28 May 1999, p. 22;

"Escape from Associations Alone is not Enough"; in: Frankfurter Allgemeine Zeitung (F.A.Z.) of 21 April 1997, p. 12;

Freedom of Undertaking Before Collective Bargaining Thanks to the Principle of Subsidiarity? Works Council Agreements as "Other Agreements" (co-author Horst Ehmann); in: Neue Zeitschrift für Arbeitsrecht (NZA), volume 7/1996, pp. 346-357.

Lecture/Seminar:

"External Staff as Compliance Trap – Labour and Media Law Implications" (Speech at the Audi practice seminar – 10. Berchtesgadener Dialog, 04 May 2015);

"Rights and Obligations of Executive Committee Members" / "Consultation Rights of the Executive Committee in Case of Reorganisations" (several seminars for Bucerius Education GmbH);

"Staff Assignment Across Companies" (event in cooperation with Berliner Wirtschaftsgespräche e.V., Berlin, 20 January 2015);

"Hiring out Employees Within a Group" (regular seminars for ManagementCircle);

"The Interview – Pitfalls in the Recruitment Process" (event in cooperation with Berliner Wirtschaftsgespräche e.V., Berlin, 15 May 2014);

"Labour Law Aspects at a Carve-Out" (speech at the 11th Munich M&A forum, Munich, 12 November 2013);

"Temporary Work – Possibilities and Obstacles of the German Temporary Employment Act (AÜG)" (speech at 1st labour law session organised by HRM Forum, Berlin, 23 October 2013);

"Dealing with Sick Employees - What Do Companies Have to Consider?" (speech in cooperation with the German business talks association Berliner Wirtschaftsgespräche e.V., Berlin, 14 May 2013);

"The enforcement in court of a lack of capacity and competence to conclude collective agree-ments, and substantive consequences" (speech at practice seminar organised by the Centre for Labour Relations and Labour Law (ZAAR), Munich, 13 December 2012);

"Protection of Confidence in Changes of Court Rulings in Labour Law and Social Law" (speech at practice seminar at Bonn University, 07 November 2012);

"Capacity to conclude collective agreements of young coalitions – How the German Federal Labour Court permits a plurality of collective bargaining agreements while prohibiting trade union pluralism" (invited lecture at Bucerius Law School, Hamburg, 17 October 2012);

"Labour Law in Field Sales and Distribution" (several seminars for Managementcircle, a provider of vocational training);

"Company Collective Agreements" (several seminars for Managementcircle);

"Structuring Working Conditions: Collective Agreement, Employment Agreement, Works Agreement (several seminars for Managementcircle);

"Labour Law Aspects Concerning Outsourcing" (several seminars for Euroforum);

"Leaving employers' associations and collective agreements for other collective and individual agreements" (several seminars for Managementcircle);

"Labour Law in Great Britain" (several seminars for Managementcircle and DGFP);

"Create Legally Secure Works Agreements" (several seminars for Managementcircle);

"Continuation and Replacement of Collective Agreements After Transfer of Business" (speech at labour law practice seminar by Prof. Dr. Reinhard Richardi at Regensburg University, 06 May 2004);

"Shifting Regulation Authorities From Parties of a Collective Agreement to Betriebspartner (Employer and Works Council)" (expert conference on ecclesiastical labour law, 10/11 March 2003, Eichstätt University);

"More Flexibility in Remuneration and Social Insurance" (Final conference of research project 'More flexibility in remuneration from economic and legal perspectives' headed by Prof. Dr. Dres. h.c. Wolfgang Franz, Prof. Dr. Walter A. Oechsler and Prof. Dr. Volker Rieble, 28 November 2002, Centre for European Economic Research, Mannheim).