Mark Gaston Pearce is an American lawyer, arbitrator and university professor who is best known for serving as a member of the National Labor Relations Board (NLRB).

He remained with the NLRB until 1994, after which he left for private practice, cofounding the firm Creighton, Pearce, Johnsen & Giroux.

Previously he received special recognition from the Lawyers Coordinating Committee of the AFL–CIO; was placed on the Honor Roll of the National Employment Law Project (NELP) and was bestowed the Leadership Award from the Western New York Council on Occupational Safety and Health.

President Barack Obama appointed Pearce as a Member of the NLRB on April 7, 2010, and he was confirmed by the United States Senate on June 22, 2010.

In an October 2016 speech at Cornell University's Law School, Pearce observed that the rise in the number of temporary workers and staffing agencies, as well as franchises, subsidiaries and other business types has caused the NLRB's job to increasingly become twofold.

The article displayed several of Pearce's labor oriented oil paintings and descscribed how he uses art and law to draw attention to workers' rights.