Joseph Marzullo has been appointed to the newly created position of sales manager, northeast region for Dunlee (Aurora, Illinois). Marzullo previously was responsible for the computed tomography business in the New England region for Siemens Medical Solutions USA. Dunlee, a division of Royal Philips Electronics, manufactures tubes for major brands of equipment, including GE, Siemens, Philips, Toshiba and Shimadzu. It also is a supplier of medical imaging components to OEM customers.

Henry O'Connell has been named president of Dynex Technologies (Chantilly, Virginia). He most recently served as president/group executive of Idex's Precision Flow Products Group. Dynex is a global supplier of microplate instrumentation and automation products for the biomedical research, drug discovery and clinical diagnostic markets.

Peter Gombrich, chairman of the board of Molecular Diagnostics (Chicago), has resigned as chairman and as a director of the company. Molecular Diagnostics develops cancer-screening systems, which can be used in a laboratory or at the point of care, to assist in the early detection of cancer.

Thomas Tully, president and CEO of Neothermia (Natick, Massachusetts), a developer of minimally invasive systems for the diagnosis of breast cancer, has informed the company's board of directors of his intention to retire, effective April 1. Tully will be succeeded by Christopher Bleck, currently executive vice president, marketing and sales. Bleck also will be elected a director of the company. Tully, who joined the company in July 2000, said he would work with Bleck and the board of directors for a smooth transition of leadership, and will continue to be available for consultation following his retirement. Bleck was named to his current post at Neothermia in January. Previously, he served as vice president, worldwide marketing, and vice president, commercial operations, for Cytyc. Neothermia's lead product is the en-bloc biopsy system.