BrandShelter Key Personnel

  • Alexander Siffrin


    Alexander Siffrin, CEOAlexander Siffrin was born in 1976 in Saarbrücken, Germany. From 1983 to 1986 he went to the school of the German embassy in Addis Abeba, Ethiopia. In 1987 he moved back to Germany and attended the grammar school 'Gymnasium Schloss Hagerhof' in Bad Honnef / Rhein. From 1992 to 1995 Alexander Siffrin lived in La Paz, Bolivia and finished the school 'Colegio Mariscal Braun' with the general qualification for university entrance in 1995. From 1996 to 2001 he studied physics and computer science at the University of the Saarland. The foundation of Key-Systems GbR took place in October 1998 during his academic studies.


  • Bonnie Wittenburg

    Executive Vice President, US

    Bonnie Wittenburg, EVP USBonnie was born in Washington, DC and resides in Northern Virginia. She studied Computer Science and holds a degree in Business Management.  She has been involved in the domain name industry since 1999. She began with the idNames group that became part of Network Solutions and which was acquired by Verisign in 2000. Bonnie then joined Iron Mountain in 2004 where she managed domain portfolios for some of the world most recognized brand holders. Her expert knowledge and passion for the domain business is well respected in the industry. She  joined Key-Systems in 2009.


  • Andreas Soll

    BrandShelter Product Manager

    Andreas Soll, BrandShelter™ Product ManagerAndreas Soll was born in Lich, Germany and grew up near Frankfurt am Main in Bad Nauheim. He has been involved in the domain business since 1999 and began his career in the sales and support area with Internet-Solutions GmbH. In 2003 he went abroad for several years and worked in the position of Sales Manager for a Micropayment company in Spain / Mallorca. After having worked two years for one of the largest Internet Service Providers in Germany, Andreas joined Key-Systems in 2007.


  • Volker Greimann

    Legal Counsel

    Volker Greimann, Legal CounselVolker Greimann was born in 1974 in Niebüll and went to school in Germany and the Netherlands (AFCENT International School). He studied law at the University of Trier from 1995 to 2000 and took courses in Japanese Studies. From 2001 to 2003 he stayed abroad in Japan for studying and working with a scholarship of the DAAD. Subsequently, he took traineeships until 2005 at the appellate court of Koblenz and at Haarmann, Hemmelrath and Partner, Tokyo Office. Before he became chief of the legal department of Key-Systems GmbH, Volker Greimann acted in the fields of Media and licensing law in Japan at Tokyo Broadcasting System (TBS) and at D-Visual.


  • Jessica Pfeiffer

    Human Resources

    Jessica Pfeiffer, Human ResorucesJessica Pfeiffer was born in 1978 in Saarbrücken and passed the general qualification for university entrance in 1998. After having finished her vocational education as a travel agent, she studied tourism and business administration at the University of Heilbronn from 2002 to 2006. During her studies she stayed abroad for six months in Vancouver/ Canada and took an internship at Venue West Conference Services Ltd. In 2007 she joined Key-Systems GmbH and since 2008 she is chief of the Human Resources Department.

Address (US)

Key-Systems USA, Inc.
885 Harrison Street SE
Leesburg, VA 20175

+1 703 574 3831
+1 201 596 1433

Address (Germany)

Key-Systems GmbH
Im Oberen Werk 1
66386 St. Ingbert

+49 6894 93 96 850
+49 6894 93 96 851

Direct Contact

We are always available to you by eMail. Support personnel are at your service by phone to assist you and take action when needed:

Germany: +49 6894 9396930
USA: +1 703 574 3831
Spain: +34 931816610
UK: +44 2033181529

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