A chipper-sounding Rob Kardashian is overseeing construction on Khloe Kardashian's new Calabasas, Calif., home; read what he's been up to lately! Credit: Denise Truscello/WireImage.com

Rob Kardashian is back! Kris Jenner's only son has re-emerged on social media, cheerfully sharing snippets of his latest projects and hobbies via Twitter. The Arthur George sock designer, according to his big sister Khloe Kardashian, has been overseeing construction on her new Calabasas, Calif., home as she films her reality spinoff this summer with sister Kourtney and family in the Hamptons.

Khloe, 29, tweeted Tuesday, June 10: "Having my brother oversee my construction at our new house while I'm in NY is a tad scary. I'm way too controlling lol." Later that evening, Rob responded and assured her the pad is in good hands.

"I got u don't you worry," Rob, 27, wrote. "Got the boom boom room all set up and everythangggggg."

As previously reported by Us Weekly, Khloe purchased Justin Bieber's home in March for $7.2 million. Among the home's renovations? A "subterranean basketball court," a source told Us back in March.

Settling in for the summer on the East Coast, Khloe sent her sisterly love via a sweet throwback snapshot on Tuesday. "I miss my best friend @robkardashian," Khloe said in the Instagram post of the very young-looking pair.

Along with helping Khloe with home renovations, Rob has also been busy following the Stanley Cup Finals and other sporting events. The avid Kings fan has expressed his dismay and excitement over the series, as the L.A. team currently leads against the New York Rangers.

Kardashian also shared several images Tuesday, including an aerial shot of a ridiculous roller coaster and a scenic photo of some cliffs nestled beside a crystal clear blue sea.

On Wednesday, June 11, he started his day with music. "A little Mumford to start the day don't hurt nobody," he tweeted.