• 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
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
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Fortune Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • 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
About Us
  • 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

Most Popular

placeholder alt text
Economy
Elon Musk warns the U.S. is '1,000% going to go bankrupt' unless AI and robotics save the economy from crushing debt
By Jason MaFebruary 7, 2026
2 days ago
placeholder alt text
Economy
Russian officials are warning Putin that a financial crisis could arrive this summer, report says, while his war on Ukraine becomes too big to fail
By Jason MaFebruary 8, 2026
17 hours ago
placeholder alt text
Commentary
America marks its 250th birthday with a fading dream—the first time that younger generations will make less than their parents
By Mark Robert Rank and The ConversationFebruary 8, 2026
1 day ago
placeholder alt text
Success
Gen Z Patriots quarterback Drake Maye still drives a 2015 pickup truck even after it broke down on the highway—despite his $37 million contract
By Sasha RogelbergFebruary 7, 2026
2 days ago
placeholder alt text
Commentary
We studied 70 countries' economic data for the last 60 years and something big about market crashes changed 25 years ago
By Josh Ederington, Jenny Minier and The ConversationFebruary 8, 2026
1 day ago
placeholder alt text
Success
NBA star Metta World Peace says Kobe Bryant taught him that no matter how hard you work, someone else is working harder
By Orianna Rosa RoyleFebruary 8, 2026
1 day 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.


Latest in Leadership

super bowl
CommentaryAdvertising
The Super Bowl reveals a dangerous gap in corporate strategy 
By Christopher VollmerFebruary 9, 2026
10 minutes ago
Thasunda Brown Duckett, TIAA CEO, speaks onstage during a live taping of "Earn Your Leisure" at Martin Luther King Jr. International Chapel at Morehouse College on January 22, 2024 in Atlanta, Georgia.
FinanceFortune 500 Companies
Meet the 10 Black Fortune 500 CEOs leading companies with over $412 billion in combined revenues
By Cheyann HarrisFebruary 9, 2026
27 minutes ago
tara comonte
CommentaryAdvertising
Weight Watchers CEO: what the GLP-1 Super Bowl ads are missing
By Tara ComonteFebruary 9, 2026
40 minutes ago
A hybrid meeting between both virtual and in person employees.
NewslettersFortune CHRO
AI notetakers are creating HR nightmares
By Kristin StollerFebruary 9, 2026
1 hour ago
ceo
CommentaryLeadership
The next 18 months of the agentic era will feel like a slow-motion stress test for CEOs. Most will make the same critical mistake
By Amy Eliza WongFebruary 9, 2026
2 hours ago
C-SuiteNext to Lead
Disney’s $27 million retention deal pays its No. 2 a higher base salary than her boss
By Ruth UmohFebruary 9, 2026
3 hours ago