The airport Hanover-Langenhagen is located in the northwest of Hanover. All important information about the Hanover airport you will find here:
Hanover airport (external link)
After you have left the airport area please turn left on the Autobahn A352 in the direction of "Dortmund". After some kilometers you will be guided on the A2 also in the direction of "Dortmund".
Please take the exit "Lauenau" and turn right on the B442 in the direction of "Hachmühlen" and "Coppenbrügge". In "Hachmühlen" turn right on the B217 towards "Hameln".

In "Hameln" turn left on the B1 in the direction of "Hildesheim". In the district "Afferde" turn right in the "Hastenbecker Landstraße" in the direction of "Hastenbeck".
After approx. 2 km (1.2 miles) turn left in the street "Freibusch" of the industrial area "Hastenbeck Nord". SOMATEC is located at the end of this street on the left.

With the suburban train line S5 you will directly reach Hameln from Hanover airport. The traveling time is approx. 1 hour and the trains will run half-hourly. The exact time table and other relevant information you will get here:
Travel service of the Deutsche Bahn (German Railways; external link)