Mr. Seong Yeon AN is a partner at D&A LLC. His practice is primarily focused on Corporate, Criminal Defense Litigation, Infrastructure & Technology, Compliance, Shipping & Aviation, Defense Industry, and Public Policy.

In particular, while working at the National Intelligence Service, Mr. An was responsible for protecting national critical and defense industry technologies (including fact-finding surveys and research security) in the economic and defense security sectors, investigating unauthorized disclosures and infringements, overseeing legislation and regulatory amendments, and conducting personnel security background checks on public officials.
Subsequently, as an executive at steel manufacturing and blockchain companies, he has built a broad spectrum spanning traditional to advanced industries, directly addressing complex compliance issues on the ground, and participating in critical corporate decision-making.
As a hands-on professional who has been at the forefront of both national policy and corporate management, he provides the most strategic solutions based on integrated insights that capture the full context of each issue.

Bar Admissions

• Admitted to Bar, Korea (2015)

Education

• Pusan National University Law School (JD, 2015)
• Kyungpook National University (LLB, 2011)
• Gimcheon High School (2005)

Significant Accomplishments

• D&A LLC (2026-Present)
• Director, SE&Company (formerly Seoul Engineering, 2024-2025)
• CLO, Ozys (2023-2024)
• National Intelligence Service (2017-2023)

Professional Activities and Experience

• |N|[General Civil Disputes/ Administrative Litigation]
• Successfully represented a project implementer in a lawsuit for nullification or revocation of designation as the project implementer and authorization for implementation plans.
• Represented the Seoul Metropolitan Government in a lawsuit and provided legal advisory
• Defended multiple corporations in general civil disputes and administrative litigations
• |B|
• |N|[Corporate Advisory]
• Advised conglomerates on the Monopoly Regulation and Fair Trade Act and the Fair Transaction in Subcontracting Act
• Advised Jeju Province Development Co. on selecting an exclusive distributor for Jeju Samdasoo
• Advised on performance-based payment of directors based on recent Supreme Court Decision
• Advised a defense company on trade secrets and contracts
• |B|
• |N|[TMT (Technology, Media, Telecoms)]
• Advised Korea Institute of Industrial Technology on engineering big data platform and establishment of guidelines
• Advised on domestic and foreign laws on electronic commerce and personal information policy