EXHIBIT
10.22


October 4, 2006


Mr. Raj Singh


Dear Raj:


I am pleased to offer you
a position with Mosys, Inc. (the “Company”) as Vice President, Marketing and
Business Development, an exempt position in which you will report directly to
me. Your semimonthly compensation will be $8,333.33 dollars, which is equal to
$200,000.00 annually.  You will also be
eligible to receive an Incentive Bonus based on the following guidelines:


-  for each Agreement which is signed with a
Strategic Account from a targeted account list and which involves substantial
payments to Mosys, you will be paid an Incentive Bonus of $12,500.  The companies that are identified as target
accounts and the determination of whether the agreement involves substantial
payments will be in the sole discretion of the Company.


In addition, you will be granted an option to purchase
175,000 shares of the Company’s common stock, subject to approval by the Board of
directors and your execution of the Company’s standard Stock Option Agreement.
The terms of such option shall be in accordance with the terms of the Company’s
stock option plan.  Accordingly, the
options will vest 25% at the end of one year of employment and 2.0833% per
month thereafter.  The per share exercise
price of the option shall be the fair market value of the Company’s common
stock on the date of grant as determined by the Board of Directors.


Upon the commencement of your employment, the Company
will enter into a Change-in-Control agreement with you, a copy of which is
attached for your reference.


You will also be
eligible to participate in the Company’s employee benefit plans including our
standard major medical, dental, life, short and long term disability, vision,
flexible benefit plan, paid holidays, personal time off (PTO) and the Company’s
401(k) plan.


You should be aware that your employment with the
Company is for no specified period and constitutes at will employment.  As a result, you are free to resign at any
time, for any reason or for no reason. 
Similarly, the Company is free to conclude its employment relationship
with you at any time, with or without cause.


For purposes of federal
immigration law, you will be required to provide to the Company documentary
evidence of your identity and eligibility for employment in the United
States.  Such 













documentation must
be provided to us within three (3) business days of your date of hire, or our
employment relationship with you may be terminated.


In the event of any dispute or claim relating to or
arising out of our employment relationship, you and the Company agree that all
such disputes shall be fully and finally resolved by binding arbitration
conducted in Santa Clara County, California. 
However, we agree that this arbitration provision shall not apply to any
disputes or claims relating to or arising out of the misuse or misappropriation
of the Company’s trade secrets or proprietary information.


To indicate your acceptance of the Company’s offer,
please sign and date this letter in the space provided below and return it to
Human Resources.  This letter, along with
the agreement relating to proprietary rights between you and the Company, set
forth the terms of your employment with the Company and supersede any prior
representations or agreements, whether written or oral.  This letter may not be modified or amended
except by a written agreement, signed by the Company and by you.


Raj, we believe that you can make a great contribution
to Mosys and we all look forward to working with you.


	
  

  	
   

  	
  Sincerely,

  
	
   

  	
   

  	
  /s/ Chet Silvestri

  
	
   

  	
   

  	
  Chet Silvestri

  
	
   

  	
   

  	
  Chief Executive Officer

  
	
  ACCEPTED AND
  AGREED TO

  	
   

  	
   

  
	
  This 6th day of
  October, 2006

  	
   

  	
   

  
	
  /s/ Raj Singh

  	
   

  	
   

  
	
  Raj Singh

  	
   

  	
   

  
	
  Start date:
  October 6, 2006