In
1983, he came to Luxembourg to work for
Hoogewerf & Co, a Luxembourg
Réviseur d'Entreprises and in
1984 he qualified as a Luxembourg
Réviseur d'Entreprises and Expert Comptable,
In
1985 he joined
DELOITTE, HASKINS & SELLS, as audit manager and in
1987 started up a tax department in the firm and was made a
tax partner in
DELOITTES in
1989. In the same year Deloitte merged with
KPMG in Luxembourg and Karl continued as a
tax partner in
KPMG, specialising in personal income taxes and international corporate structures.
In
1992, he left KPMG and created
HORSBURGH & Co. S.A., which
in 2008 changed its name to
Company and Accounting Services S.A., is a subsidiary of
HT Group S.A.. Other subsidiaries of the group are
: Tax and Salary Services S.àr.l. and International Audit Services S.àr.l. (IAS). The goup was licenced by the
Ordre des Experts Comptables and the
Institut des Réviseur d’Entreprises tax planning and compliance, the creation of corporate structures, company formation and administration, accounting and audit.
In
2012 HT Group merged into
Vistra Luxembourg S.A., a
Commission de Supervision et Surveillance Financiere (CSSF) licenced company administrator with offices in 20 countries. Karl remained in the position of managing partner of
IAS a CSSF licenced
Réviseur d'Entreprise Agrée. He is also an
Adviser to the Vistra Luxembourg management Board.