• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
LeadershipNext to Lead

T-Mobile’s CEO shares the management shift that vaulted the company from a $6B to $195B telecom giant

Emma Burleigh
By
Emma Burleigh
Emma Burleigh
Reporter, Success
Down Arrow Button Icon
Emma Burleigh
By
Emma Burleigh
Emma Burleigh
Reporter, Success
Down Arrow Button Icon
June 21, 2024, 11:30 AM ET
Mike Sievert, CEO of T-Mobile.
Mike Sievert, CEO of T-Mobile, shared the leadership qualities that are essential in business.Getty Images

Successful leaders embody three traits: They’re innovative thinkers, they lean into their strengths, and they’re masterful storytellers. That’s according to T-Mobile CEO Mike Sievert, who took to the stage at The Wharton School of the University of Pennsylvania’s May commencement to share leadership and career lessons gathered over his 12 years at the telecom giant.

Starting with what makes for an effective manager, Sievert said the term itself is a misnomer. “The fallacy of management is the name. Managers aren’t here to manage things—at our best, we are here to change things.” Strong supervisors are change agents, able to challenge the status quo and switch strategies when things aren’t panning out. They also have an inventive, growth mindset, are willing to push boundaries, and can influence their teams to do the same. “Good leaders are here to bend the curve, not just manage it,” Sievert said.

Notably, he attributes this state of mind to helping catapult T-Mobile from a $6 billion market cap company to a $195 billion telecommunication juggernaut. His success as a leader, said Sievert, boiled down to consistently looking for new growth avenues, taking a chance on experimental ideas, and brainstorming ways to improve customer experiences. It also required taking smart, calculated risks with the business—and on himself. “It’s a simple formula: Take a chance on yourself, and find someone who will take a chance on you,” he said.

Sievert also told students to lean into what comes to them naturally, focusing on what they’re good at rather than on correcting their weaknesses. “Following your competence” in areas that feel innate makes it easier to expand on relevant skills and augment one’s expertise, leading to stronger contributions to the business. Still, Sievert added, leaders should be open to coaching and mentorship to develop their new and existing abilities. Passion for the job will hopefully follow suitwhen using this strategy, he said.

Along those same lines, good leaders avoid getting bogged down by failures. They center their efforts on the “green”—what drives high return on investment—rather than the red, or what’s not working. 

“Most companies are fixated on the red, obsessing over what’s going wrong. I think that’s a big mistake,” Sievert said. “I’m much more focused on the green, what’s working, and how to replicate and grow that success. It’s far more productive and rewarding to stoke successes than to constantly fight fires.” That means feeding into teams’ strengths and wins, investing more in high-reward projects, and expediting smart ventures. In doing so, Sievert said, “Others across the organization start feeling motivated to replicate elements of the winning project’s success formula—and more wins tend to follow.”

Finally, Sievert said that leaders should be strong storytellers. Compelling narratives are the most powerful tool to motivate and build relationships with both employees and consumers while also pushing a business agenda. Whether you’re a recruiter interviewing job candidates, a manager looking to motivate staffers, or a leader guiding a team to create new products, Sievert said, storytelling matters. “Good finance people can maintain great spreadsheets, but the best one can tell the story that those numbers portray.”

The power of a gripping tale shouldn’t be underestimated, he emphasized, pointing to startups that attract investors because of their alluring stories. Within the workplace, storytelling also comes into play when narrating one’s career to hiring managers or making a plea to the CEO or board. Being able to translate and emphasize the “why,” Sievert said, is the most essential skill in business and life.

“You have the power to connect with people’s emotions, inspire actions, disarm people with a laugh, and humanize complex things and make them relatable.”

Join us at the Fortune Workplace Innovation Summit May 19–20, 2026, in Atlanta. The next era of workplace innovation is here—and the old playbook is being rewritten. At this exclusive, high-energy event, the world’s most innovative leaders will convene to explore how AI, humanity, and strategy converge to redefine, again, the future of work. Register now.
About the Author
Emma Burleigh
By Emma BurleighReporter, Success

Emma Burleigh is a reporter at Fortune, covering success, careers, entrepreneurship, and personal finance. Before joining the Success desk, she co-authored Fortune’s CHRO Daily newsletter, extensively covering the workplace and the future of jobs. Emma has also written for publications including the Observer and The China Project, publishing long-form stories on culture, entertainment, and geopolitics. She has a joint-master’s degree from New York University in Global Journalism and East Asian Studies.

See full bioRight Arrow Button Icon

Latest in Leadership

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Leadership

karp
Future of Workpalantir
Palantir CEO says AI ‘will destroy’ humanities jobs but there will be ‘more than enough jobs’ for people with vocational training
By Jacqueline MunisApril 11, 2026
32 minutes ago
Berkshire Hathaway's Warren Buffett
SuccessWealth
Warren Buffett says ‘accumulating great amounts of money’ doesn’t achieve greatness—He still lives in a $31,500 Nebraska home and clipped coupons
By Emma BurleighApril 11, 2026
45 minutes ago
AI promises to free workers from grunt work, but psychologists say those mindless tasks are exactly what our brains need to recover
AIworker productivity
AI promises to free workers from grunt work, but psychologists say those mindless tasks are exactly what our brains need to recover
By Marco Quiroz-GutierrezApril 11, 2026
4 hours ago
Three people sit behind a desk and look at the phone screen of the person in the middle.
Future of WorkConsulting
Meet ‘trendslop,’ the new, AI-fueled scourge of workplace consultants everywhere
By Sasha RogelbergApril 10, 2026
14 hours ago
A young man looks at his phone, and a flurry of red arrows point downwards.
Cryptosports betting
Prediction markets have made betting easier than ever—and young men are paying the price
By Carlos GarciaApril 10, 2026
18 hours ago
chick-fil-a
North AmericaImmigration
Why Chinese immigrants to America love Chick-fil-A so much
By Fu Ting and The Associated PressApril 10, 2026
20 hours ago

Most Popular

Scottie Scheffler joined Tiger Woods and Rory McIlroy in golf's $100M club—and donated his entire Ryder Cup stipend to charity
Success
Scottie Scheffler joined Tiger Woods and Rory McIlroy in golf's $100M club—and donated his entire Ryder Cup stipend to charity
By Fortune EditorsApril 10, 2026
20 hours ago
Schools across America are quietly admitting that screens in classrooms made students worse off and are reversing years of tech-first policies
Innovation
Schools across America are quietly admitting that screens in classrooms made students worse off and are reversing years of tech-first policies
By Fortune EditorsApril 10, 2026
1 day ago
Mark Cuban admits he made a mistake letting go of the Mavericks: 'I don't regret selling. I regret who I sold to'
Investing
Mark Cuban admits he made a mistake letting go of the Mavericks: 'I don't regret selling. I regret who I sold to'
By Fortune EditorsApril 9, 2026
2 days ago
The U.S. government is spending $88 billion a month in interest on national debt—equal to spending on defense and education combined
Economy
The U.S. government is spending $88 billion a month in interest on national debt—equal to spending on defense and education combined
By Fortune EditorsApril 9, 2026
2 days ago
A Meta employee created a dashboard so coworkers can compete to be the company's No. 1 AI token user—and Zuckerberg doesn't even rank in the top 250
AI
A Meta employee created a dashboard so coworkers can compete to be the company's No. 1 AI token user—and Zuckerberg doesn't even rank in the top 250
By Fortune EditorsApril 9, 2026
2 days ago
The Navy confirmed an ‘abundant amount’ of Uncrustables when the Artemis II crew lands. Smucker’s just offered them a lifetime supply
Politics
The Navy confirmed an ‘abundant amount’ of Uncrustables when the Artemis II crew lands. Smucker’s just offered them a lifetime supply
By Fortune EditorsApril 10, 2026
14 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.