PARIS, France, September 12 /PRNewswire-FirstCall/ -- ExonHit Therapeutics S.A. (Alternext : ALEHT), a drug and diagnostic discovery company, today announces the appointment of John Jaskowiak as Executive Vice President, Business and Marketing, working out of its US subsidiary in Gaithersburg, Maryland. Mr Jaskowiak will be responsible for the Company's business activities in the North American market, particularly in the field of genomics and diagnostics.