Five days after a new leader took the helm, Plymouth-based Select Comfort Corporation announced a series of leadership transitions.

Most notably, the company named Michael Bills chief marketing officer (CMO) and senior vice president. The CMO position has been vacant since last June, when interim CMO Wendy Schoppert became Select Comfort’s chief financial officer.

Bills comes to Select Comfort from the Innovation Initiative at the Fisher College of Business at The Ohio State University, where he served as executive director; the Innovation Initiative focuses on education, training, and consulting related to the creation of new products and services.

Select Comfort also said Wednesday that it has eliminated the chief operating officer (COO) role, which was occupied by Shelly Ibach until she became president and CEO on June 1. The company said that its new senior leadership team was built around a “broadened direct-report structure that more tightly aligns with the company’s key strategic goals.”

Among the company’s other new appointments: Select Comfort’s Chief Sales Officer Andy Carlin and Chief Product Officer Annie Bloomquist were promoted from vice presidents to senior vice presidents and members of the senior management team.

Carlin oversees all sales channels, and Bloomquist is responsible for leading product management, research, and development efforts for Sleep Number-branded items. Select Comfort launched the Sleep Number brand in 2001. Sleep Number beds allow individuals to adjust the firmness and support of each side of the mattress with the push of a button.

“This is an exciting time for Sleep Number as we continue to focus on delivering an unparalleled sleep experience for our customers,” Ibach said in a statement. “To that end, we’ve built an experienced, consumer-centric senior leadership team dedicated to realizing our potential as both a brand and company for the benefit of customers, employees, and shareholders.”

Ibach joined Select Comfort in 2007 and became COO in 2011. In February, while announcing that she would move to the company’s top post, Select Comfort described her as one of the “key architects” behind its growth formula. And grow it has: For 2011, Select Comfort reported earnings of $60.5 million, or $1.07 per share, on revenue of $743.2 million. That’s up significantly from $31.6 million, or 57 cents per share, on revenue of $605.7 million for the prior year. It is among Minnesota’s 40-largest public companies based on revenue.