Exhibit 99.4

February 5, 2008

Raj Nathan
SVP & Chief Marketing Officer
(Delivered by hand)

Dear Raj:

This is to inform you of your 2008 compensation as approved by the Sybase, Inc. Compensation Committee:

1. Cash Compensation (effective January 1, 2008)

1.	Annual base salary: $402,031
2.	Incentive bonus target: $281,422
3.	Total target cash compensation (TTC): $683,453

The terms of the incentive bonus are set out in the Executive Leadership Team Incentive Plan.

2. Long-Term Incentives

(a)	Sybase Stock Option Grant (4-year vest)
	•   16,280 options
(b)	Restricted Stock Grant (performance vest)
	•   10,380 shares
(c)	Restricted Stock Grant (time vest)
	•   3,460 shares

The vesting terms are set out in the relevant equity award grant agreement.

I also want to take this opportunity to thank you for your contributions in 2007. I look forward to your support and contributions in 2008.

Sincerely,

/s/ John S. Chen

John S. Chen
Chairman, CEO and President