Sezin has 22 years of dedicated career in competition/antitrust field. Prior to establishing CORE, she
served as the head of the Competition/Antitrust practice at a major international law firm, White &
Case, in Türkiye for 12 years (2011-2023). Previously, she worked for the Turkish Competition
Authority (“TCA”) for 10 years (2001-2011) as a senior case handler/expert in competition law.
Sezin represents clients in a full array of competition/antitrust matters, including merger control, cartel
and dominance investigations and compliance in a broad variety of industries. Sezin has been involved
in hundreds of merger/acquisition/JV cases to date, both on the TCA side – reviewing and analysing
merger filings as a case handler – and on the law firm side preparing and making the merger
submissions on behalf of the clients. Aside from Türkiye, Sezin has significant experience in multi-jurisdictional merger filing analysis, as well as coordinating merger control filings on a global scale.
Throughout her career, Sezin has been involved in a number of landmark competition investigations in
Türkiye, successfully representing investigated parties before the TCA. Aside from assisting the
clients with establishing the underlying facts (internal investigations) and developing the most viable
defence strategy, she also provides strategic advice for the optimal outcomes through leniency
applications, settlement negotiations and the use of commitment mechanism.
Throughout her career, Sezin has consistently been recognised by international directories: Legal 500,
Chambers & Partners, Global Competition Review (“GCR”) and Who’s Who Legal (“WWL”). Such
directories have referred to Sezin as the “go-to” advisor for companies facing antitrust issues. Known
as “pragmatic, solution-oriented and business-minded”, clients have described Sezin as “a hands-on
partner, always reachable and quick to rise to the occasion when needed. She harmonises her top-notch antitrust knowledge with her business acumen”.
In 2023, Sezin has been recognised as Next Generation Partner by Legal 500 and is Highly
Recommended by GCR. She has been repeatedly selected for inclusion in Chambers & Partners, in
which clients describe her as “a spectacular competition specialist and standout professional”. Sezin
is also recognised by Who’s Who Legal: Competition and was recently named a Future Leader by the
publication. Sezin has also been the winner of “Client Choice Award” for Turkey Competition – an
award nominated only by clients and corporate counsel – for the past two years.
In addition to her professional endeavours, Sezin has taken part in various significant roles in the past.
She has served as a representative for Türkiye in the EU-Türkiye Bilateral Meeting on Competition
Policy where she was responsible for engaging in negotiations with EU officials, with a specific focus
on the insurance and air transportation sectors. Sezin has also collaborated with the World Bank on
joint studies and has participated in the US Antitrust Policy Training program organised by the US
Department of Justice and Federal Trade Commission. Furthermore, she has actively participated in
several EU competition law workshops conducted by the EU Commission, as well as attended and
contributed papers to numerous national and international seminars and workshops.