Apple has made some big changes in recent months - here's a look at the top new hires and moves you might have missed

Apple promoted Giannandrea to its executive team in December, which the company announced at the end of last year. Giannandrea now oversees Siri as part of his new role following the departure of Bill Stasior, the executive formerly in charge of the company’s digital assistant. The shift in Siri leadership was reported by both The Wall Street Journal and The Information.

Apple hired Giannandrea away from Google in April 2018, where he played a critical role in incorporating artificial intelligence into the company’s products. In 2016, Google tapped Giannandrea to oversee its search organization, a testament that speaks to just how critical AI is for the search giant.

Giannandrea’s promotion comes as Apple has made a push to incorporate Siri more tightly into its products and expand its capabilities over the past several years. The news also comes as Amazon and Google continue to enhance their own digital assistants, with the online retail giant integrating Alexa into everything from wall clocks to microwaves. When it comes to smart home speakers, Amazon is currently the market leader accounting for 63% of smart speaker usage in the United States according to Strategy Analytics. Google is responsible for 17% of the market, while Apple only comprises of 4%.

Apple hired Ahn from Samsung SDI, the battery affiliate of the South Korean electronics giant, in December. Bloomberg first reported the hire.

Ahn’s LinkedIn profile suggests he worked on batteries for next-generation devices, although his precise duties at Apple are unclear. The hire could be part of an effort by Apple to reduce its reliance on Samsung for components by putting resources toward in-house talent. Apple began working with LG as a secondary supplier for the OLED screens last year in a move to mitigate its dependence on Samsung, Apple’s biggest smartphone rival, according to Bloomberg.

It appears to be part of a broader move by Apple to produce its own components, as the outlet also reported that the iPhone maker plans to produce its own chips for Mac computers starting sometime around 2020.

Apple is said to have cut 200 employees from its Project Titan team as part of a restructuring resulting from new leadership under former Tesla executive Doug Field, CNBC reported last month. In a statement to CNBC, Apple provided the following comment regarding the layoffs:

"We have an incredibly talented team working on autonomous systems and associated technologies at Apple. As the team focuses their work on several key areas for 2019, some groups are being moved to projects in other parts of the company, where they will support machine learning and other initiatives, across all of Apple . . We continue to believe there is a huge opportunity with autonomous systems, that Apple has unique capabilities to contribute, and that this is the most ambitious machine learning project ever."

Apple hasn't said much publicly about its plans regarding autonomous driving, but in 2015 Apple's Chief Operating Officer Jeff Williams referred to the car as "the ultimate mobile device" when speaking at Recode's Code Conference.

Earlier this month, Apple announced that 30-year company veteran Deirdre O’Brien would succeed Angela Ahrendts as the company’s retail chief. Before taking on the responsibility of overseeing Apple’s 70,000 retail employees in more than 500 stores across the world, O’Brien led Apple's human resources division. O’Brien will be tasked with completing the store remodelings that Ahrendts started as well as finding new ways to showcase Apple’s services in stores, according to The Wall Street Journal. One such project could involve installing televisions in stores to promote the company’s original shows, the report says.

Roughly a year and a half since apps powered by Apple's ARKit augmented reality platform became available for the iPhone, Apple has designated a marketing head for its AR division. Frank Casanova, who has worked at Apple for about 30 years, was recently appointed as Senior Director of Worldwide Product Marketing for the company's augmented reality efforts according to his LinkedIn profile, which Bloomberg first reported.

That Apple would assign such a senior marketing executive with nearly three decades of experience at the company to oversee augmented reality provides further evidence that Apple views AR as being a vital part of its business. Apple CEO Tim Cook has long been vocal about the potential of augmented reality, saying he believes the technology will make the smartphone "even more essential than it currently is" when speaking with CNBC.

The company is reportedly working on an augmented reality headset to be released in 2020 that would support some iPhone features, like messaging, phone calls, and video, according to Bloomberg. But the company's current augmented reality offerings live on its iPhone and iPad devices through its ARKit platform, which provides developers with tools for creating AR-enabled apps for Apple's mobile devices. It's another sign that Apple is looking to software to fuel iPhone growth moving forward.

Apple has tapped Jadallah, formerly the CEO of now-defunct smart lock startup Otto, to lead its smart home initiative, CNBC recently reported. Jadallah’s exact title is unclear, but his LinkedIn profile says he is “working on Home” at Apple as of this month. He spent 12 years at Microsoft earlier in his career as a corporate vice president.

Apple began its push into the home with the unveiling of its HomeKit platform in 2014. The company extended its presence in the home with the launch of HomePod in 2018, a high-end speaker with Siri built-in. Apple’s decision to hire Jadallah indicates smart home products remain a priority for the company as reports indicate it plans to push more deeply into new product areas digital subscription services.