The hiring was announced Thursday by the German Tennis Federation.
The 43-year-old Arriens reached a career-high ranking of 109 during a professional career lasting from 1991 to 1999. He played in four Grand Slam tournaments and won one tour title.
Arriens had been working as a coach for the DTB since 2002.
Germany plays Argentina in the first round of the World Group from Feb. 1-3.
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