Lockheed Martin, in Bethesda, Md., promoted Maryanne R. Lavan to general counsel. Lavan has been with Lockheed since 1990 and most recently was vice president of internal audit.

Chegg.com, an online textbook rental company, appointed Robert Chesnut as its general counsel. Chesnut joins the company from LiveOps Inc., where he served as senior vice president and general counsel.