Exhibit A Joint Filing Agreement

Exhibit A

Joint Filing Agreement

     In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with each other of a statement on Schedule 13D (including all amendments thereto) (the “Statement”) with respect to the common stock, par value $0.001, of Sequenom, Inc., and further agree that this Joint Filing Agreement be included as an exhibit to such Statement. In evidence whereof, the undersigned, being duly authorized, hereby execute this Joint Filing Agreement as of this 12^th day of June, 2006.

SIEMENS VENTURE CAPITAL GMBH
By:		/s/ XX. XXXX XXXXXXX
		Name:		Xx. Xxxx Xxxxxxx
		Title:		CEO
By:		/s/ XXXXXX XXXXXXXXX
		Name:		Xxxxxx Xxxxxxxxx
		Title:		CFO
SIEMENS AKTIENGESELLSCHAFT
By:		/s/ XXXXXXX XXXX
		Name:		Xxxxxxx Xxxx
		Title:		Corporate Vice President and Treasurer
By:		/s/ XX. XXXXXX XXXXXX
		Name:		Xx. Xxxxxx Xxxxxx
		Title:		Senior Counsel