In a shakeup at the A+E Networks’ cablers, Lifetime chief Rob Sharenow will take on oversight of A&E Network. Former A&E head David McKillop is shifting his focus to producing.

The shuffle is among the first major decisions made by Paul Buccieri in his new role as president of A&E and History. The move comes as A&E has endured a ratings decline during the past year, after soaring on the back of “Duck Dynasty” in previous years.

As exec VP and g.m. of A&E Network and Lifetime, Sharenow will now report to Buccieri on A&E matters and to A+E group CEO Nancy Dubuc for Lifetime. He’ll oversee all aspects of programming and marketing for both cablers.

“After 10 years of tremendous growth – we have a renewed focus on re-establishing A&E as a top-tier brand,” said Buccieri. “Rob is the ideal candidate for the job. Before his tenure at Lifetime, Rob was instrumental in the success of A&E for nearly a decade. He was a key member of A&E’s leadership team that developed some of the network’s biggest hit franchises. Under Rob’s leadership at Lifetime, the brand is undergoing a revitalization with a record number of Emmy nominations and returning series. Rob is a great leader with the right balance of creative acumen and strategic vision, essential for today’s changing landscape.”

Sharenow has been in the History, A&E and Lifetime fold since 2000. He shifted from a programming post at A&E to overseeing Lifetime in 2011, and since then the cabler has made strides in terms of improving ratings and better critical reception for some of its programming.

McKillop came up through the ranks at History before taking over programming at A&E and its sibling Bio channel in 2011. Before joining History in 2007, he was a programming and production exec for Discovery Communications cablers.

In a memo to staffers, Buccieri said McKillop made the decision to “return to his roots as a producer.” Buccieri cited McKillop’s contributions to History’s growth into a top 10 cable net with the success of “Pawn Stars,” “American Pickers” and “Swamp People.”

“I hope his future producing endeavors find a home on A+E Networks,” Buccieri wrote.