T-Mobile Business Executive Mo Katibeh Steps Down
The company has appointed Michael Labunski to manage its business product, marketing, and operations.
Updated on Oct. 27, 2026 in People
Mo Katibeh has departed his role as the executive vice president and chief marketing officer of T-Mobile US Business. Michael Labunski, who previously served as RingCentral chief data officer, will take over leadership of business marketing, product, and operations.
Why it matters
This leadership transition is part of a broader management shift within the company following the July 2026 departure of former chief business and product officer Mike Katz. The move marks a significant personnel change for the division as it continues to reorganize its enterprise strategy.
Mo Katibeh served as EVP and CMO of T-Mobile US Business for nearly 3 years. Prior to his tenure at T-Mobile, he spent 20 years at AT&T and 2 years at RingCentral.
The players
Mo Katibeh
He is the former executive vice president and chief marketing officer of T-Mobile US Business.
Michael Labunski
He is the new head of business product, marketing, and operations at T-Mobile who previously served as chief data officer at RingCentral.
Mike Katz
He is the former chief business and product officer of T-Mobile who is currently serving in an advisory role.
Chris Sambar
He serves as the chief enterprise officer at T-Mobile following his appointment in July 2026.
The details
Katibeh announced his departure from the company via a post on LinkedIn. Michael Labunski, the new lead for business product, marketing, and operations, brings previous experience from his role as chief data officer at RingCentral.
Timeline
April 2024: Mo Katibeh joined T-Mobile.
July 2026: Mike Katz stepped down as chief business and product officer and Chris Sambar was appointed as chief enterprise officer.
October 2026: Mo Katibeh departed his position at T-Mobile.
December 2026: Mike Katz is scheduled to conclude his advisory role.
Market Landscape
This transition follows the July 2026 leadership changes at T-Mobile that saw the appointment of a new chief enterprise officer. The move reflects an ongoing effort to reshape the corporate structure after the departure of previous long-term business division leadership.
The leadership change is an internal management shift that currently has no direct impact on T-Mobile customer pricing or service availability. Clients should expect continued operations as the company integrates new leadership into its business product and marketing divisions.
The takeaway
Management turnover is a common occurrence as large telecommunications firms shift their strategic focus to compete in the enterprise market. Leadership changes like this often indicate internal shifts in priorities, though they do not always result in immediate changes to customer-facing services.
What happens next
Mike Katz is set to finish his tenure as an advisor to the company in December 2026.
Further reading
For more information on executive moves, visit the United States People section.
