With Season 6 scheduled for July 2019, audiences will see how Henry Simmons' Alphonso "Mack" Mackenzie deals with his new position as S.H.I.E.L.D. Director, and Marvel has just shared the first image of him in the role. In the picture, he looms large in a control room, wearing a black leather jacket and a rather grim expression.

"Personally, I love the challenge of being the director of S.H.I.E.L.D.," Simmons told TVLine. "Mack has worked side-by-side with the people he now leads, that works to his advantage... He's one of them. But, the one thing that can hinder Mack's ability to lead is his reluctance to put the people he loves in the line of danger. As a result, this may lead to Mack's toughest decision as director."

RELATED: Agents of SHIELD: Chloe Bennet Shares Quake's Season 6 Look

For S.H.I.E.L.D. agents, being put in the line of danger is nothing new, but the nature of the challenges they'll be facing in the next season are as-yet unknown. Simmons offered an ominous hint of what's to come with the question, "What sacrifices will be made?"

RELATED: Marvel's Agents of SHIELD Renewed For Season 7

At the end of Agents of S.H.I.E.L.D. Season 5, the team's hierarchy shuffled around a bit when Phil Coulson stepped down as Director and offered his place to his protege Daisy Johnson, aka Quake. She, in turn, nominated a different team member: Mack, who has been with the team since the show's second season.

Returning in July 2019 on ABC for its sixth season, Agents of S.H.I.E.L.D. stars Ming-Na Wen, Chloe Bennet, Henry Simmons, Iain De Caestecker, Natalia Cordova-Buckley and Elizabeth Henstridge.