Following Apple’s major executive-related news this afternoon, Apple CEO Tim Cook has emailed employees with information on the announced changes. Additionally, Cook has shed light on some new details not included in the public press release. First of all, Cook thanks Apple’s iOS Senior Vice President Scott Forstall “for all of his many contributions to Apple over his career.” As for Forstall’s replacement, Craig Federighi, Cook notes that Federighi led the successful release of OS X Mountain Lion earlier this year.

I am also announcing that Scott Forstall will be leaving Apple next year and will serve as an advisor to me during the interim. I want to thank Scott for all of his many contributions to Apple over his career.

Perhaps in bigger news from this internal email, Cook says that Bob Mansfield, the new executive in charge of Apple’s new “Technologies” group will remain at Apple for two years. This is notable as Mansfield announced his retirement earlier this year. Mansfield came back to lead this new Technologies group, and Dan Riccio has filled the void of Mansfield’s former post as Senior VP of Hardware Engineering.

As part of this, I am thrilled to tell you that Bob will remain with Apple for an additional two years. Bob has led some of our most challenging engineering projects for many years.

As for John Browett’s departure, Cook is less thankful (as he was for Forstall). Cook adds an extra note regarding those in Apple’s retail division by saying, “this phenomenal team of talented and dedicated people works their hearts out making our customers happy. They have our respect, our admiration and our undying support.”

Cook also shares additional information on Jony Ive’s expanded role at Apple.

Cook ends his letter with a personal note, thanking everyone at Apple for working so hard:

Please join me in congratulating everyone on their new roles. I’d like to thank everyone for working so hard so that Apple can continue to make the world’s best products and delight our customers. I continue to believe that Apple has the most talented and most innovative people on the planet, and I feel privileged and inspired to be able to work with all of you.

The full message to employees is after the break:

Team,

We are in one of the most prolific periods of innovation and new products in Apple’s history. The amazing products that we’ve introduced in September and October – iPhone 5, iOS6, iPad mini, iPad, iMac, MacBook Pro, iPod touch, iPod nano and many of our applications – could only have been created at Apple, and are the direct result of our relentless focus on tightly integrating world-class hardware, software and services.

Today, I am announcing changes that will encourage even more collaboration between our world-class hardware, software and services teams at all levels of our company. As part of these changes, Jony Ive, Bob Mansfield, Eddy Cue, and Craig Federighi will be taking on more responsibilities. I am also announcing that Scott Forstall will be leaving Apple next year and will serve as an advisor to me during the interim. I want to thank Scott for all of his many contributions to Apple over his career.

Jony Ive will provide leadership and direction for Human Interface (HI) across the company in addition to his longtime role as the leader of Industrial Design. Jony has an incredible design aesthetic and has been the driving force behind the look and feel of our products for more than a decade. The face of many of our products is our software and the extension of Jony’s skills into this area will widen the gap between Apple and our competition.

Eddy Cue will take on the additional responsibility of Siri and Maps. This places all of our online services in one group. Eddy and his organization have overseen major successes such as the iTunes Store, the App Store, the iBookstore and iCloud. They have an excellent track record of building and strengthening our online services to meet and exceed the high expectations of our customers.

Craig Federighi will lead both iOS and OS X. We have the most advanced mobile and desktop operating systems on the planet, and bringing together our OS teams will make it even easier to deliver our best technology and user experience innovations to both platforms. Craig recently led the very successful release of Mountain Lion.

Bob Mansfield will lead a new group, Technologies, which combines all of our wireless teams across the company in one organization, allowing us to innovate in this area at an even higher level. This organization will also include all of our semiconductor teams, who have some very ambitious plans. As part of this, I am thrilled to tell you that Bob will remain with Apple for an additional two years. Bob has led some of our most challenging engineering projects for many years.

Additionally, John Browett is leaving Apple. Our search for a new head of Retail is already underway. In the meantime, the Retail team will report directly to me. Retail has an incredibly strong network of leaders at the store and regional level, and they will continue the excellent work they’ve done over the past decade to revolutionize retailing with unique, innovative services and a focus on the customer that is second to none. This phenomenal team of talented and dedicated people works their hearts out making our customers happy. They have our respect, our admiration and our undying support.

Please join me in congratulating everyone on their new roles.

I’d like to thank everyone for working so hard so that Apple can continue to make the world’s best products and delight our customers. I continue to believe that Apple has the most talented and most innovative people on the planet, and I feel privileged and inspired to be able to work with all of you.

Best,

Tim