Robert Mehrabian will resume the role of chief executive at Teledyne Technologies Inc. upon the retirement of current head Al Pichelli on Oct. 15.Mehrabian has been with the Thousand Oaks aerospace, marine and digital imaging products manufacturer since 1999, most recently as executive chairman. He stepped down as chief executive when Pichelli took the position in January 2019.Pichelli has provided more than 40 years of hands-on management at the company, and Mehrabian congratulated him on his outstanding service and loyalty to the company.“While we shall miss Al, my personal engagement and oversight will continue to be as strong as ever, but with additional help from our next generation of leaders,” Mehrabian said in a statement.In addition to Mehrabian taking on the chief executive role, three other Teledyne executives were promoted as part of succession planning.Edwin Roks was promoted to executive vice president of Teledyne upon the closing of the Flir Systems Inc. acquisition in May. Roks remains president of Teledyne’s Digital Imaging businesses.Jason VanWees will become vice chairman with continuing responsibility for strategy, mergers, acquisitions, investor relations and margin improvement programs. He is currently executive vice president.George Bobb III will become senior vice president. He will remain president of Teledyne’s Aerospace and Defense Electronics segment and will resume leadership for classified Digital Imaging programs and Teledyne’s Information Technology efforts, as well as oversee the management of Teledyne’s Marine Instrumentation group.Shares of Teledyne (TDY) closed Monday up 9 cents, or a fraction of a percent, to $458.98 on the New York Stock Exchange, on a day when the Dow Jones closed down at a fraction of a percent.