Owner of Westenberg Advokatur & Mediation, Basel, Switzerland

Partner at Liatowitsch & Partner, Basel, Switzerland

Owner of the law firm WestenbergPartner, Basel/Liestal

Partner at various law firms in Switzerland

Various internships as a lawyer in court, at various law offices and at the cantonal tax authority

Collaborative Lawyer, clp Schweiz

Mediator training at IEF Zürich (recognized as SAV mediator in 2007)

Master of Business Administration (MBA), City University, Seattle

Obtained Ph.D, Dr. iur. University of Basel (Thesis: Citizenship in Swiss private international law)

Bar exam (Canton of Basel-Country), Admission to the bar

lic.iur. University of Basel, Faculty of Law

Commented on Articles 20/21/22 and 24 IPRG [Swiss Federal Act on Private International Law]; Basel comment on Swiss private law, international private law; published by Grolimund/Loacker/Schnyder, Basel, 4th edition 2020

Internationale güterrechtliche Verhältnisse aus Schweizer Sicht [International marital assets from the Swiss perspective], in FamPra 2016, pg. 123 ff. (together with Gabrielle Bodenschatz)

Commented on articles 20/21/22 and 24 IPRG [Swiss Federal Act on Private International Law]; Basel commentary on Swiss private international law, Private international law; Published by Honsell/Vogt/Schnyder/Berti, Basel, Switzerland, 3rd edition 2012

Commented on articles 20/21/22 and 24 IPRG [Swiss Federal Act on Private International Law]; Basel commentary on Swiss private international law, Private international law; Published by Honsell/Vogt/Schnyder/Berti, Basel, Switzerland, 2nd edition 2007

Unlauterer Wettbewerb [Unfair competition] (together with David Vasella), in: Handbuch des Internationalen Wirtschaftsrechts [manual of international business law]; Otto Schmidt publishing company, Cologne, Germany, 2001

Aktienrecht [Company law]: by Büren / Walter Stoffel / Anton K. Schnyder / Catherine Christen-Westenberg; Schulthess publishing company, Zurich, Switzerland, 2001

Commented on articles 20/21/22 and 24 IPRG [Swiss Federal Act on Private International Law]; Basel commentary on Swiss private international law, Private international law, published by /Vogt/Schnyder/Berti, Basel, Switzerland, 1st edition 1996

Staatsangehörigkeit im schweizerischen Internationalen Privatrecht [citizenship in Swiss private international law]; Schweizer Studien zum internationalen Recht [Swiss studies on private international law)], Schulthess publishing house, Zurich, Switzerland, 1992

Ausländische Liegenschaften im internationalen Güter- und Erbrecht [Foreign properties in international matrimonial regimes and inheritance law]: Schulthess Forum Ehegüterrecht [matrimonial property law], Zurich and Bern, Switzerland

Eine Schweizer Sicht zur Mediation und zu ADR im Kindesschutz und Familienrecht im grenzüberschreitenden Kontext [A Swiss perspective on mediation and on ADR in child protection and family law in an international context]: Deutsch-Englischsprachige Richtertagung [German/English-language meeting of magistrates], Vienna, Austria

Anerkenn- und vollstreckbare Entscheidungen nach Haager Übereinkommen über die zivilrechtlichen Aspekte von internationalen Kindsentführungen (HKÜ) [recognized and enforceable decisions according to the Hague Convention on the Civil Aspects of International Child Abduction]: Bundesamt für Justiz [Federal Office of Justice], Bern, Netzwerk von Fachpersonen BG-KKE [network of specialists, Swiss Federal Act on International Child Abduction and the Hague Conventions on the Protection of Childs and Adults]

Internationale güterrechtliche Verhältnisse aus Schweizer Sicht: Fachgruppe Güter- und Erbrecht der Advokatenkammer Basel [international marital property from the Swiss perspective: Specialist group for marital property and inheritance law of the Basel Bar Association] (together with Gabrielle Bodenschatz)