Roy McCauley, who has served as a Cup Series crew chief for the past four years with the team, will remain with Penske Racing and assume a leadership role within the organization.
Guy will lead the No. 12 Penske Dodge Cup Series team, while Wolfe will serve as crew chief for the No. 22 Discount Tire Dodge squad that will compete full-time in the Nationwide Series with Keselowski behind the wheel.
Guy, 36, most recently worked as the crew chief on the No. 78 Furniture Row Racing car driven by Regan Smith in Cup Series competition. A native of Lancaster, Penn., Guy is an experienced crew chief that has worked in NASCAR's Camping World Truck Series, Nationwide Series and at the Cup Series level.
"I am really excited to join Penske Racing and I'm looking forward to the opportunities that lie ahead with the No. 12 Penske Dodge team," said Guy. "Over the years, the No. 12 team has had a lot of success, including winning the 2008 Daytona 500, and we certainly want to build on that tradition of winning. Brad (Keselowski) is one of the most talented drivers in NASCAR and we will work together to develop his skills and make this team the best it can be."
Wolfe, a former competitor on the track, will team with Keselowski to pursue the 2010 Nationwide Series championship with the No. 22 Discount Tire Dodge team. The 32-year-old native of Milford, N.Y., raced in the Nationwide Series and completed his fourth season as a crew chief in 2009 as he led the charge for the No. 11 CJM Racing team with drivers Scott Lagasse, Jr., Denny Hamlin and others.
"The chance to work with Penske Racing and a driver as skilled as Brad is a tremendous opportunity," said Wolfe. "With the team that we will have in place, we know that 2010 will be a special season for the No. 22 Discount Tire Dodge and we will work hard to make sure we are ready to meet the challenge."
"Both Jay and Paul have a lot of experience throughout all levels of motorsports competition and they each seem to get the most out of the teams and drivers that they work with," said Keselowski. "I'm really looking forward to working with Jay next season in my first full season of Cup Series competition with the No. 12 Penske Dodge team. We are also excited to race for the Nationwide Series title with Paul and the No. 22 Discount Tire Dodge team in 2010."