Form 6-K

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                        Report of Foreign Private Issuer

                        Pursuant to Rule 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934

                         For the month of February, 2005

                              CONVERIUM HOLDING AG
                 -----------------------------------------------
                 (Translation of registrant's name into English)

                                 Baarerstrasse 8
                                   CH-6300 Zug
                                   Switzerland
                    ----------------------------------------
                    (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.

                        Form 20-F    X        Form 40-F
                                  -------              -------

Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

                        Yes             No   X   
                           -------        -------

If "Yes" is marked, indicate the file number assigned to the registrant in 
connection with Rule 12g3-2(b):  82-   Not Applicable





                           Converium Holding Ltd, Zug


Zug, Switzerland - February 10, 2005 - Converium today announces the appointment
of Andreas Zdrenyk as interim CFO.

The Board of Directors of Converium Holding Ltd has agreed to the appointment of
Andreas Zdrenyk as interim CFO of Converium following Martin Kauer's scheduled
departure on February 28, 2005. Converium's search for a successor to Martin
Kauer is ongoing and will extend beyond his departure date.

Andreas Zdrenyk joined Zurich Re/Converium in 1998 and has gained in-depth
insight into the Company's operations in various functions such as Chief
Financial Officer of Converium Zurich and Zurich Re Zurich, respectively, and
Head of Internal Audit & Consulting. He currently serves as Converium's Global
Chief Information Technology Officer. Prior to joining Zurich Re/Converium
Andreas Zdrenyk spent a total of 16 years with the Winterthur Swiss Insurance
Group, 6 years of which as regional Head of Internal Audit North America based
in the United States.

Andreas Zdrenyk, a Swiss citizen, holds a Master's of Business Administration
degree from Cox School of Business (Dallas, USA) and a Master's of Information
Systems / Information Technology degree from the Swiss Association of Commerce
(Zurich, Switzerland).

Converium is pleased that Andreas Zdrenyk has accepted this interim role in
order to ensure management continuity in the Company's finance area.


                                  * * * * * * *


Enquiries:

Esther Gerster                              Zuzana Drozd
Manager Corporate Communications            Head of Investor Relations

esther.gerster@converium.com                zuzana.drozd@converium.com
                                            --------------------------

Phone:         +41 (0) 1 639 90 22          Phone:         +41 (0) 1 639 91 20
Fax:           +41 (0) 1 639 70 22          Fax:           +41 (0) 1 639 71 20





About Converium

Converium is an independent international multi-line reinsurer known for its
innovation, professionalism and service. Today Converium employs more than 700
people in 20 offices around the globe and is organized into three business
segments: Standard Property & Casualty Reinsurance, Specialty Lines and Life &
Health Reinsurance. Converium has a "BBB+" rating (outlook stable) from Standard
& Poor's and a "B++" rating (outlook stable) from A.M. Best Company.

Important Disclaimer

This document contains forward-looking statements as defined in the U.S. Private
Securities Litigation Reform Act of 1995. It contains forward-looking statements
and information relating to the Company's financial condition, results of
operations, business, strategy and plans, based on currently available
information. These statements are often, but not always, made through the use of
words or phrases such as `expects', `should continue', `believes',
`anticipates', `estimates' and `intends'. The specific forward-looking
statements cover, among other matters, the reinsurance market, the outcome of
insurance regulatory reviews, the Company's operating results, the rating
environment and the prospect for improving results, the amount of capital
required and impact of its capital improvement measures, including the
restructuring of our U.S. business and its reserve position. Such statements are
inherently subject to certain risks and uncertainties. Actual future results and
trends could differ materially from those set forth in such statements due to
various factors. Such factors include general economic conditions, including in
particular economic conditions; the frequency, severity and development of
insured loss events arising out of catastrophes, as well as man-made disasters;
the outcome of our regular quarterly reserve review, the ability to exclude and
to reinsure the risk of loss from terrorism; fluctuations in interest rates;
returns on and fluctuations in the value of fixed-income investments, equity
investments and properties; fluctuations in foreign currency exchange rates;
rating agency actions; changes in laws and regulations and general competitive
factors, and other risks and uncertainties, including those detailed in the
Company's filings with the U.S. Securities and Exchange Commission and the SWX
Swiss Exchange. The Company does not assume any obligation to update any
forward-looking statements, whether as a result of new information, future
events or otherwise.


www.converium.com
-----------------





                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                               CONVERIUM HOLDING AG




                                               By:  /s/ Dirk Lohmann
                                                  ------------------
                                                    Name:      Dirk Lohmann
                                                    Title:     CEO



                                               By:  /s/ Christian Felderer
                                                  ------------------------
                                                    Name: Christian Felderer
                                                    Title: General Legal Counsel



Date: February 10, 2005