Marta Kos

Marta Kos built an influential career across journalism, diplomacy, politics, and European leadership, helping shape the future of EU enlargement.

Marta Kos Biography and Early Life

Marta Kos was born on June 28, 1965, in Šempeter pri Gorici, Slovenia. She grew up in a region shaped by changing European borders and later developed an international outlook through journalism, diplomacy, and public service.

She studied journalism and political science at the University of Ljubljana. Her education gave her a strong foundation in communication, international affairs, and public institutions. She also became known as a competitive swimmer, demonstrating discipline and determination before entering public life.

Kos began her professional career as a journalist. She worked for Deutsche Welle and became a foreign correspondent for Radio Television Slovenia in Germany. Reporting from abroad helped her understand how political decisions affect public opinion and how national events are interpreted across borders.

Her journalism developed skills that later became central to her diplomatic career. She learned to ask direct questions, assess competing claims, explain complex issues, and communicate with people from different backgrounds. Those abilities helped her move into government communication and international relations.

From 1997 to 1999, Kos served as director of Slovenia’s Government Public Relations and Media Office and as a government spokesperson. She then became vice president for international relations at the Chamber of Commerce and Industry of Slovenia, expanding her experience in economic diplomacy.

Marta Kos Diplomatic Career and European Leadership

Marta Kos became Slovenia’s ambassador to Germany in 2013. Her posting in Berlin placed her at the center of an important European relationship and allowed her to represent Slovenia during a period of significant regional and international change.

From 2017 to 2020, she served as Slovenia’s ambassador to Switzerland and Liechtenstein. Her diplomatic work required negotiation, relationship building, public communication, and detailed knowledge of European political and economic interests.

Before and between diplomatic assignments, Kos worked in leadership development, training, and consultancy. From 2003 to 2013, she was director and co-owner of Gustav Käser Training International Slovenia. She later operated Kos Consulting and Coaching, advising organizations and professionals.

These roles broadened her understanding of management and institutional change. She developed experience in helping people communicate more effectively, lead teams, and respond to complex environments. That practical perspective complemented her experience in government and diplomacy.

Kos also helped establish ONA VE, a Slovenian women’s association focused on increasing the visibility of women experts in public discussion. The initiative reflected her belief that societies benefit when women’s knowledge and leadership are more fully represented in the media and public institutions.

She became active in Slovenian politics and served as vice president of the Freedom Movement party. In 2022, she was selected as the party’s candidate for president of Slovenia but later withdrew from the race. Her political experience added a domestic dimension to a career previously centered on international relations.

In December 2024, Kos became European Commissioner for Enlargement in the second European Commission led by Ursula von der Leyen. She is responsible for helping guide the European Union’s relations with candidate and potential candidate countries.

EU Enlargement Responsibilities and Historical Impact

As Commissioner for Enlargement, Kos works with countries seeking to join the European Union. Her portfolio includes the Western Balkans, Ukraine, Moldova, Türkiye, and countries in the Southern Caucasus. The process is based on progress in reforms, rule of law, democratic values, and institutional readiness.

Her role carries major strategic importance. EU enlargement is not only an administrative process. It affects peace, security, economic development, regional cooperation, and the future shape of Europe. Decisions made during her mandate may influence relationships across the continent for decades.

Kos has particular responsibility for supporting Ukraine’s reconstruction and accession path. She also works with Moldova as it advances its European aspirations. These responsibilities require careful coordination between political reform, economic assistance, infrastructure, security, and public trust.

The Western Balkans remain another central focus. Countries in the region have long-standing connections with the European Union but face complex challenges involving institutional reform, political stability, bilateral disputes, and public expectations. Kos’s Slovenian background gives her personal knowledge of the region’s history and its experience of European integration.

Her approach emphasizes a merit-based accession process. Candidate countries must make credible progress rather than receive membership solely for political reasons. At the same time, she has supported gradual integration that allows citizens to experience practical benefits before full membership.

This balance between strict standards and meaningful encouragement is one of the central challenges of enlargement policy. Countries need motivation to reform, but the Union must also protect its legal order, democratic principles, and institutional capacity.

Kos’s appointment also has symbolic significance. She is the first woman to lead the European Commission’s enlargement portfolio and one of the most prominent representatives of a country from the former Yugoslavia to hold this responsibility.

Legacy of Diplomacy Reform and European Vision

Marta Kos’s legacy is still being formed, but her career already illustrates the value of combining communication with diplomacy. She has moved between journalism, government, business, political life, and European institutions while maintaining a focus on cooperation and international understanding.

Her professional journey offers an inspirational lesson about adaptability. Each stage prepared her for the next. Journalism developed her communication skills, government service introduced institutional responsibility, diplomacy expanded her international perspective, and European leadership placed those experiences within a wider strategic mission.

She also represents a more connected model of public leadership. Modern European officials must understand politics, media, economic development, technology, civil society, and public expectations. Kos’s varied background allows her to approach enlargement as a human and political process rather than a purely bureaucratic exercise.

The challenges facing her portfolio are substantial. Wars, disinformation, democratic backsliding, economic inequality, and public skepticism can all weaken support for European integration. Success requires patience, credibility, honest communication, and continued engagement with citizens as well as governments.

For aspiring diplomats and public servants, her career demonstrates that influence is built over time. Expertise gained in one field can become valuable in another when it is combined with curiosity, discipline, and a willingness to accept responsibility.

Marta Kos has become an important European figure because her career connects national experience with continental ambition. Through journalism, diplomacy, and public leadership, she continues to promote a vision of Europe shaped by cooperation, reform, democratic values, and the belief that a wider Union can create greater stability and opportunity.