Mike Sievert

Mike Sievert

Sievert at T-Mobile headquarters, 2023

Personal details
Born	G. Michael Sievert 1969/1/1 (age 57) 🇺🇸 Canton, Ohio, United States
Nationality	🇺🇸 American
Citizenship	🇺🇸 United States
Residence	🇺🇸 Seattle metropolitan area, Washington, United States
Languages	🇺🇸 English
Education	University of Pennsylvania Wharton School (BS in Economics, 1991)
Spouse	Suzanne Steiner Sievert (m. 1990s)
Children	2 (Johnny Sievert, Nate Sievert)
Parents	Information private
Career details
Occupation	Business Executive, Telecommunications Leader
Years active	1991-present
Employer	T-Mobile US
Title	Vice Chairman (2025-present) Former CEO (2020-2025)
Term	CEO: April 1, 2020 - 2025 Vice Chairman: 2025 - present
Predecessor	John Legere (as CEO)
Compensation	US$24.2 million (2023)
Net worth	Template:Increase US$120 million (December 2024)
Board member of	T-Mobile US, Inc. Deutsche Telekom AG
Awards	• CNN Business CEO of the Year (2022) • Yale Legend in Leadership Award (2024) • Fast Company Most Innovative CEOs
Website	t-mobile.com/our-story/executive-leadership-team/mike-sievert

G. Michael "Mike" Sievert (born 1969) is an American business executive who served as the chief executive officer (CEO) of T-Mobile US from April 2020 to 2025 and currently serves as vice chairman of T-Mobile and its board of directors. Under his leadership as CEO, Sievert successfully integrated Sprint Corporation following T-Mobile's $26 billion merger, transforming the company into the third-largest wireless carrier in the United States and a formidable competitor to AT&T and Verizon.

During Sievert's tenure as CEO, T-Mobile's stock price rose 159.3%, net income increased 270%, and adjusted free cash flow grew 468%, earning him recognition as CNN Business "CEO of the Year" in 2022 and Yale's "Legend in Leadership Award" in 2024.

Early life and education

Childhood in Ohio

G. Michael Sievert was born in 1969 in Canton, Ohio, an industrial city in northeastern Ohio known as the home of the Pro Football Hall of Fame. He grew up in a middle-class household in the Canton area, attending local public schools.

Early entrepreneurship:

Sievert displayed entrepreneurial instincts from an early age. At age ten, he became a paper carrier for The Repository, Canton's daily newspaper, delivering papers in his neighborhood. Rather than spending his earnings on typical childhood purchases, young Mike saved his money to buy technology equipment:

• First purchase: A Radio Shack TRS-80 computer
• Later purchase: A Commodore 64

These early computing experiences in the 1980s sparked Sievert's lifelong interest in technology and telecommunications, ultimately shaping his career path in the tech industry.

Education

GlenOak High School:

Sievert attended GlenOak High School in Canton, graduating in 1987. At GlenOak, he was known for his academic abilities and interest in business and economics.

Wharton School of Business:

In 1987, Sievert enrolled at the Wharton School of the University of Pennsylvania, one of the nation's most prestigious business schools.

• Attended: 1987-1991
• Degree: Bachelor of Science in Economics
• Graduated: 1991

His Wharton education provided strong foundations in:

• Marketing and brand management
• Financial analysis
• Strategic planning
• Consumer behavior

Career

Procter & Gamble (1991-1998)

After graduating from Wharton in 1991, Sievert joined Procter & Gamble (P&G), one of the world's largest consumer goods companies, in a brand management role.

At P&G, Sievert managed several iconic brands:

• Pepto-Bismol - The pink bismuth subsalicylate brand
• Crest - Leading toothpaste brand

This P&G experience instilled in Sievert the consumer marketing disciplines that would later define his approach at T-Mobile:

• Deep consumer research and insights
• Brand positioning and differentiation
• Marketing execution and measurement
• Understanding customer behavior

IBM and technology sector

Following P&G, Sievert transitioned to the technology industry, joining IBM in a marketing and product role. At IBM, he gained experience in:

• Enterprise technology sales
• B2B marketing
• Technology product management

AT&T Wireless (2002-2005)

From 2002 to 2005, Sievert served as Executive Vice President and Chief Marketing Officer (CMO) of AT&T Wireless, giving him his first major telecommunications industry experience.

At AT&T Wireless, Sievert:

• Oversaw brand strategy and marketing campaigns
• Led customer acquisition and retention programs
• Experienced the competitive dynamics of the wireless industry
• Witnessed the AT&T Wireless merger with Cingular (later becoming AT&T Mobility)

Microsoft (2005-2008)

In 2005, Sievert joined Microsoft's Global Windows Group as Corporate Vice President of Product Management. His primary responsibility was leading preparations for the release of Windows Vista (codenamed "Longhorn"), Microsoft's next major operating system update.

At Microsoft, Sievert:

• Led product management for Windows consumer products
• Prepared go-to-market strategy for Windows Vista
• Worked with major PC manufacturers on product launches
• Managed large cross-functional teams

E-Trade (2008-2010)

Sievert served as Executive Vice President and Chief Global Marketing and Sales Officer at E-Trade Financial, the online brokerage firm. During his tenure, E-Trade was recovering from the financial crisis, and Sievert helped rebuild the brand's consumer trust.

Switchbox Labs and Clearwire (2008-2012)

Entrepreneurial venture:

In 2008, Sievert co-founded Switchbox Labs, a startup focused on cloud-based consumer technology. In 2009, Switchbox Labs was acquired by Lenovo, the Chinese computer manufacturer, allowing Sievert to gain entrepreneurial experience and a successful exit.

Clearwire:

Sievert also held an executive position at Clearwire, a wireless broadband provider that was later acquired by Sprint. This experience gave him direct insight into spectrum and network economics.

Discovery Bay Games

Before joining T-Mobile, Sievert served as CEO of Discovery Bay Games, a tablet gaming company. This role gave him experience running a company as chief executive and understanding the mobile gaming market.

T-Mobile (2012-present)

Chief Marketing Officer (2012-2015)

In 2012, John Legere, T-Mobile's new CEO, recruited Sievert as Chief Marketing Officer to help execute an ambitious turnaround strategy.

Un-carrier strategy:

Sievert was instrumental in developing and executing T-Mobile's famous "Un-carrier" marketing strategy, which positioned T-Mobile as a disruptive alternative to AT&T and Verizon:

• Eliminated two-year contracts
• Introduced unlimited data plans
• Launched equipment installment plans
• Created "T-Mobile Tuesdays" customer rewards
• Developed irreverent, competitor-challenging advertising

The Un-carrier strategy transformed T-Mobile from the industry's struggling fourth-place carrier into a fast-growing disruptor.

Chief Operating Officer (2015-2018)

In 2015, Sievert was promoted to Chief Operating Officer, adding operational responsibilities to his marketing role. As COO, he oversaw:

• Network operations and engineering
• Retail store operations
• Customer service
• Supply chain and logistics

President (2018-2020)

In 2018, Sievert was named President of T-Mobile, the number-two position behind CEO John Legere. In this role, he:

• Led day-to-day operations
• Prepared for potential Sprint merger
• Built relationships with investors and regulators
• Developed long-term strategic plans

CEO (April 2020 - 2025)

In November 2019, T-Mobile announced that Sievert would succeed John Legere as CEO in May 2020. However, due to the COVID-19 pandemic and the timing of the Sprint merger approval, Sievert assumed the CEO role a month early on April 1, 2020 - the same day T-Mobile completed its merger with Sprint.

Sprint integration:

Sievert's first and most critical challenge as CEO was integrating Sprint, a $26 billion acquisition that combined:

• Two national wireless networks
• 100 million+ combined customers
• Tens of thousands of employees
• Overlapping retail footprints
• Competing technology platforms (GSM vs. CDMA)

The integration was widely considered successful, completed ahead of schedule and below projected costs. T-Mobile consolidated Sprint's network onto its own infrastructure, achieving significant benefits while expanding 5G coverage.

5G leadership:

Under Sievert, T-Mobile aggressively built out its 5G network, using Sprint's valuable mid-band spectrum to offer the fastest and most extensive 5G coverage among U.S. Carriers.

Performance as CEO:

During Sievert's tenure as CEO (April 2020 - 2024):

• TMUS stock price: +159.3%
• Net income: +270%
• Adjusted free cash flow: +468%
• Customer additions: Industry-leading growth
• 5G network: Largest and fastest in U.S.

Vice Chairman (2025-present)

In 2025, Sievert transitioned from CEO to Vice Chairman of T-Mobile and its board of directors, with an annual base compensation of $7 million.

Leadership style

Sievert is known for:

• Customer obsession: Continuing T-Mobile's focus on customer experience
• Competitive intensity: Maintaining aggressive positioning against AT&T and Verizon
• Operational discipline: Delivering on collaboration and financial commitments
• Cultural preservation: Maintaining T-Mobile's distinctive corporate culture

Personal life

Family

Mike Sievert is married to Suzanne Steiner Sievert, a Harvard-educated teacher. They have two adult sons, Johnny and Nate.

Residence

The Sievert family lives in the Seattle metropolitan area of Washington, near T-Mobile's headquarters in Bellevue.

Interests and hobbies

Sievert enjoys maritime activities and aviation:

• Aviation: Licensed seaplane pilot
• Boating: Enjoys time on Pacific Northwest waters
• Technology: Lifelong interest stemming from early TRS-80 and Commodore 64 days

Compensation and net worth

Compensation

As CEO, Sievert received comprehensive compensation:

2023 compensation:

• Base salary: ~$1.5 million
• Annual bonus: Performance-based
• Stock awards: Significant equity grants
• Total compensation: ~$24.2 million

Net worth

Sievert's net worth is estimated at approximately $120 million as of December 2024, derived primarily from:

• T-Mobile stock holdings and awards
• Previous compensation from T-Mobile
• Earlier career earnings

Recognition and awards

• CNN Business "CEO of the Year" (2022)
• Yale "Legend in Leadership Award" (2024)
• Fast Company "Most Innovative CEOs"
• Wireless industry leadership recognition

Controversies

Data breaches

During Sievert's tenure, T-Mobile experienced several significant customer data breaches affecting millions of customers, raising concerns about cybersecurity practices:

• 2021 breach affecting 54+ million customers
• 2023 breach affecting 37 million customers

T-Mobile subsequently invested heavily in cybersecurity improvements.

Price increases

Critics noted that T-Mobile raised prices on some plans following the Sprint merger, despite promises to regulators that the merger would benefit consumers through lower prices.

See also

• T-Mobile US
• John Legere
• Sprint Corporation
• Deutsche Telekom

External links

• Official T-Mobile Biography
• Bloomberg Profile
• LinkedIn Profile