Former Ericsson executive Ulf Ewaldsson is joining T-Mobile US’ network operations where he will serve under current T-Mobile CTO Neville Ray. The move is the latest by a former top Ericsson exec to a domestic carrier.

Ewaldsson is joining T-Mobile US later this month as senior vice president for technology transformation. The carrier notes he will be tasked with helping to drive its “5G technology evolution strategy.”

The new gig will also see Ewaldsson move his family from Sweden to the U.S. T-Mobile US is headquartered in Bellevue, Washington.

T-Mobile US recently acknowledged that it had turned on its 5G network in 30 markets across the country. The carrier has said it plans to have a nationwide 5G network in 2020.

Ewaldsson had served in various roles at Ericsson, including CTO and head of its digital services business. He left the vendor’s executive team early last year for a position as an advisor to current CEO Börje Ekholm. That move followed a rough operational patch for the vendor.

Ekholm replaced long-time Ericsson CEO Hans Vestberg in late 2016. Vestberg was ousted after the company experienced several quarters of struggling earnings. However, Vestberg was not unemployed very long as he was tapped by Verizon to run its network team in early 2017, and later was named CTO. Vestberg ascended to CEO at the carrier last August.

More Ericsson Changes

The Ewaldsson news came on the heels of his former employer announcing the departure of a long-time executive.

Ericsson this week said that Helena Norrman, who serves as senior vice president, chief marketing and communications officer, and head of marketing and corporate relations, was leaving the company “to pursue opportunities outside the company.”

Norrman has been with Ericsson since 1998, and served on its executive team since 2010. Her last day at the company will be no later than June 30.

Ekholm praised Norrman in a press statement, but the move is assumed to have been a surprise as the company did not immediately announce a replacement. Ericsson did note that it has started looking for her replacement.

The departure is the latest in a long-line of executive changes at Ericsson as it looks to stabilize operations.