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Newsletter N°83 - December 2025 

Telecom 83

📶Telecom: SK Telecom Slashes Executive Ranks by 30% Amid Major Restructuring

SK Telecom (SKT), South Korea's largest mobile carrier, has implemented a sweeping 30% reduction in its executive workforce as part of a major organizational overhaul triggered by the fallout from a devastating data breach earlier this year. The restructuring represents one of the most aggressive cost-cutting measures in the company's history and is part of a broader transformation across SK Group.

 

Key Figures and Financial Impact

The restructuring comes after SKT suffered catastrophic financial losses:

  • Operating profit plunged 90.9% year-over-year in Q3 2025, falling to just â‚©48.4 billion ($34.1 million) from â‚©493 billion​

  • Net loss of â‚©166.7 billion ($117.1 million), ending a 25-year streak of consecutive quarterly profits​

  • Revenue dropped 12.2% to â‚©3.98 trillion​

  • Customer compensation costs exceeded â‚©500 billion ($351 million), including mobile fee discounts, data bonuses, and waived termination fees​

  • â‚©1.35 trillion fine imposed by the Personal Information Protection Commission​

  • 720,000–840,000 subscribers lost through number portability following the breach​

 

The Hacking Incident

In April 2025, SKT disclosed a massive cyberattack that compromised USIM data for nearly 27 million subscribers—more than half of South Korea's population. Government investigators discovered 33 different malware strains across 28 servers, with the intrusion dating back approximately three years. The breach exposed sensitive data including phone numbers, IMSI numbers, authentication keys, and some personal information.​

SKT's CEO at the time called it "the worst hacking case in telecom history" for the company. The carrier was forced to suspend new customer sign-ups, replace SIM cards for all 25 million users, and implement extensive compensation programs.​

 

Organizational Changes

The November 2025 restructuring introduced significant leadership and structural changes:

  • New CEO: Jung Jai-hun, a former judge and Chief Governance Officer, was appointed as SKT's new CEO—the first time a lawyer has led the company​

  • Dual CIC Structure: The company reorganized into two Company-in-Company divisions: MNO CIC (telecommunications) led by Han Myung-jin, and AI CIC (artificial intelligence) led jointly by Yoo Kyung-sang and Jeong Seok-geun​

  • AI CIC Cuts: Within the AI CIC division, approximately 40% of executives lost their positions​

  • 11 new executives promoted, but overall executive ranks decreased by 30% due to a larger number of retirements​

 

The AI CIC, launched in September 2025, has also offered voluntary retirement packages to all 1,000 employees in the division, with reports that non-retirees faced relocation to regional offices outside the capital.​

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Jung Jae-hun, the new CEO of SK Telecom, delivers a keynote speech at the SK AI Summit 2025 held in Seoul on November 3rd

SK Group-Wide Restructuring

The SKT cuts are part of a broader SK Group reorganization:

  • SUPEX Pursuit Council (SK Group's highest consultative body) is reducing staff by 40–50%, shifting execution functions to individual affiliates

  • SK Innovation has already undergone significant reductions due to poor EV battery business performance

  • SK Hynix is exempt from cuts due to strong semiconductor performance

  • Executive appointments were accelerated by one month, with CEO-level changes announced on October 30 and lower-level appointments finalized in early December

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Korean Corporate Culture: Year-End Executive Reshuffles

The SKT restructuring follows a long-standing tradition among Korean conglomerates (chaebols) of conducting annual year-end executive reshuffles between early December and early January. This practice involves organization-wide promotions, demotions, departmental transfers, and sometimes dramatic workforce reductions.

 

Senior leadership changes typically occur first, with team-level reassignments announced between Christmas and New Year's Day.

Employees often find themselves assigned to entirely new departments where they have little prior experience, requiring them to quickly acquire new skills. This "shuffle" is considered a normal part of Korean corporate life, designed to prevent stagnation, promote fresh perspectives, and align organizations with evolving strategic priorities.

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In challenging economic years, these reshuffles can take on a more aggressive character—dubbed 칼바람 ("blade wind")—characterized by significant executive culls and organizational consolidation. The 2025 cycle has been particularly intense, with Samsung, LG, and other major groups also conducting significant leadership changes amid AI transformation efforts and economic uncertainty.

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