Commonwealth Laboratories, LLC (“Commonwealth”) is a state and federally licensed, CLIA-certified, FDA-registered independent clinical laboratory specializing in assisting our physicians and patients with the diagnosis of some of the common sources of digestive distress and functional GI disorders.

Our hydrogen and methane breath testing services provide a fast, reliable and convenient diagnostic tool for identifying Small Intestinal Bacterial Overgrowth (SIBO), a leading cause of the symptoms associated with Irritable Bowel Syndrome (IBS), as well as other digestive disorders including Lactose Intolerance, Fructose Intolerance, Sucrose Intolerance and Helicobacter Pylori (H. Pylori). Commonwealth provides an easy-to-use take-home test kit that allows patients to administer the test and collect the specimens in the comfort of their own home.

Most recently, Commonwealth introduced IBSchek™, a new blood test designed to help physicians quickly and reliably diagnose Irritable Bowel Syndrome. IBSchek™ is based on the scientific findings of Mark Pimentel, MD, which showed that anti-vinculinand anti-CdtB are effective biomarkers for the diagnosis of diarrhea-prominent IBS. The test utilizes a proprietary, ELISA-based blood test, providing results within 24 hours of sample receipt at Commonwealth.

Commonwealth is currently seeking qualified candidates for the open positions at our headquarters in Salem, Massachusetts, as well as sales representatives throughout the United States! We are looking for talented, efficient, highly-motivated candidates who are interested in working for a rapidly growing company. Our products are targeted toward gastroenterologists, primary care physicians, nurse practitioners, and naturopathic markets. Our newest diagnostic test, IBSchek™ has received significant media coverage as the only quick and reliable diagnostic test for Irritable Bowel Syndrome (IBS), a condition affecting nearly 40 million Americans.

Please review the job descriptions below and email your cover letter and resume to

Open Positions

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Questions? Contact us!