Alere Inc., a Waltham-based provider of diagnostic tests, announced the appointment Wednesday of Namal Nawana as its new chief operating officer, effective Dec. 30.

Nawana comes to Alere from Johnson & Johnson, where he has spent 15 years in various roles, spanning the fields of engineering, marketing, sales and general management, Alere said in a press release.

At Alere, Nawana will be responsible for all commercial, R&D, and operational functions, globally.

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On its website, Alere defines its mission as empowering individuals to take charge of their health under the supervision of their healthcare providers. The company said it brings this vision to life by developing smart products that address broad, unmet needs and extend diagnosis from the lab, doctor’s office, and hospital to people’s homes.