Virginia’s longest-serving commonwealth’s attorney, Paul B. Ebert, isn’t ready to end his career just yet, he said to more than 150 supporters Friday.

During a campaign kick-off dinner at The Inn at Vint Hill, Ebert said he plans to seek re-election for a 12th term this fall for the position he has held for 43 years.

“It’s been a good run for me and I enjoy my job,” Ebert said. “I have good friends and a good staff. As long as I have a little bit of my mind left I might as well do something with it. “

When Ebert was elected to the position in 1968, he was the youngest commonwealth’s attorney in the state, colleagues said. At 73, he is now the oldest.

Ebert, a Democrat, has been challenged only four times during the past 11 campaigns, colleagues said. No challenger has emerged yet for this year.

Over the decades, he has prosecuted drug, murder and child-abuse cases. He has incarcerated numerous criminals and sent more than a dozen people to death row. He is perhaps best known as the prosecutor in the death penalty case of Washington area sniper John Allen Muhammad. Ebert was picked by former attorney general John Ashcroft to prosecute Muhammad, who was found guilty and executed in 2009.

“He’s tough when he has to be, but shows compassion when possible,” said Mike Dixon, senior assistant to Ebert. “He’s been so successful because he’s a very humble man who cares deeply about the people” he serves.