The Secretary-General is head of the International Bureau of the PCA. The current Secretary-General is Hugo Hans Siblesz.
Prior to assuming his position as Secretary-General of the Permanent Court of Arbitration, Mr. Siblesz served as Ambassador of the Kingdom of the Netherlands to France, Monaco and Andorra (2006-2012).
Secretary-General Siblesz joined the Dutch Ministry of Foreign Affairs in 1973. Among other roles, he acted as Assistant Legal Adviser, Director of the Consular Department and Director-General for Political Affairs over the course of his career.
The Secretary-General received his law degree from the Free University of Amsterdam.
The following is a list of Secretaries-General who have served the PCA since its founding.
|Baron R. Melvil van Lynden||1900-1901|
|Mr. L.H. Ruyssenaers||1901-1905|
|Baron L.P.M.H. Michiels van Verduynen||1905-1929|
|Dr. M.A. Crommelin||1929-1947|
|Jonkheer A.M. Snouck Hurgronje||1948-1951|
|Dr. A. Loudon||1951-1953|
|Prof. J.P.A. François||1954-1968|
|Baron E.O. van Boetzelaar||1968-1980|
|Mr. J. Varekamp||1981-1990|
|Mr. P.J.H. Jonkman||1990-1999|
|Mr. Tjaco T. van den Hout||1999-2008|
|Mr. Christiaan M.J. Kröner||2008-2011|
|Mr. Hugo H. Siblesz||2012-present|