exhibit 10. 2 march 30, 2011 mr. robert a. doty 7101 playa vista drive, unit 305 playa vista, ca usa 91706 robert, i am pleased to offer you the position of president and chief executive officer of engine clean solutions, inc. ( “ engine clean ” or the “ company ” ) reporting to the president and chief executive officer of quintana gold resources corp. ( “ qgrc ”, “ parent ” or “ parent company ” ). qgrc is in the process of changing its name to “ cleantransportation group inc. ”, the conditions of your employment with the company are as follows : · term. thirty six ( 36 ) months, effective from the date of signing. · term. thirty six ( 36 ) months, effective from the date of signing. · position. in the position of president and chief executive officer of engine clean, or such position as the company may from time to time designate, you will perform on a full - time basis all of the duties and responsibilities of that position and such other duties on behalf of the company consistent with the position which may be assigned or delegated to you from time to time. · position. in the position of president and chief executive officer of engine clean, or such position as the company may from time to time designate, you will perform on a full - time basis all of the duties and responsibilities of that position and such other duties on behalf of the company consistent with the position which may be assigned or delegated to you from time to time. · other duties. these activities will include specific presentations and communications internal and external to the company ( including with the board of directors and shareholder forums ). in this capacity you will be working closely with the parent company ’ s president and ceo on a variety of evolving corporate matters including a series of confidential activities with the board of directors of the company. · other duties. these activities will include specific presentations and communications internal and external to the company ( including with the board of directors and shareholder forums ). in this capacity you will be working closely with the parent company ’ s president and ceo on a variety of evolving corporate matters including a series of confidential activities with the board of directors of the company. · reporting. you will report to the president and ceo of the parent company or to such other person or persons as the company may reasonably determine from time to time in its absolute discretion. no change by the company of