Reinhardt has been with the Raynham, Mass.-based medical device company since 2002, according to a press release.
Nawana stepped down abruptly Nov. 27 after less than a year on the job.
Orthopedics This Week reported that Reinhardt would succeed Nawana when the latter stepped down.
The executive shuffle comes amid tough times for the spinal products business. Global sales for the division were down 3% on an operational basis and U.S. sales were down approximately 6% during the last quarter, according to the website.
J&J in June paid $19.7 billion for the Swiss orthopedics giant to form the DePuy Synthes Cos. of Johnson & Johnson.