PeopleofSuperintelligence

Researcher

Heikki Mannila

Heikki Mannila is a computer scientist at Aalto University who designs algorithms for finding patterns in data, from association rules to episodes in sequences. After a 1985 PhD at the University of Helsinki, he became a professor there in 1989 and coauthored a 1994 paper that identified the monotonicity property for pruning candidate itemsets used by most association rule mining algorithms. Stints at Microsoft Research and Nokia Research followed, along with the 2001 book Principles of Data Mining, the 2003 ACM SIGKDD Innovation Award and the 2009 IEEE ICDM Research Contributions Award. He led the Academy of Finland as president from 2012 to 2022 and returned to Aalto as a professor in March 2022. Since October 2025, he is Aalto's Associate Vice President, AI Strategy and Adoption, and he directs its House of AI research centre.

Timeline

  1. 1985–1996

    Helsinki PhD and professorship

    He earns his PhD in computer science at the University of Helsinki in 1985, supervised by Esko Ukkonen, and after a short spell in Tampere becomes a professor at the University of Helsinki in 1989. He is a visiting professor at the Technical University of Vienna in 1993 and a visiting researcher at the Max Planck Institute for Computer Science in Saarbrücken in 1995–1996.

  2. 1994

    Efficient association rule discovery

    In 1994, he coauthors "Efficient Algorithms for Discovering Association Rules" with Hannu Toivonen and A. Inkeri Verkamo. This KDD 94 paper identifies the monotonicity property for pruning candidate itemsets that underlies most association rule mining algorithms.

  3. 1998–2001

    Microsoft Research and Nokia

    He moves to Microsoft Research in Redmond in 1998 and returns to Finland in 1999 to join Nokia Research, where he stays until the end of 2001. In 1999, he also becomes a professor of computer science at Helsinki University of Technology, now part of Aalto University.

  4. 2001

    Principles of Data Mining

    With David Hand and Padhraic Smyth, he coauthors the book Principles of Data Mining, published by MIT Press in 2001. The book also appears in Chinese and Polish editions.

  5. 2002–2004

    A SIGKDD Innovation Award

    From 2002 to 2004, he is research director of the basic research unit of the Helsinki Institute for Information Technology (HIIT). He wins the ACM SIGKDD Innovation Award in 2003; the award committee highlights his concept of inductive databases, which integrate data mining and databases.

  6. 2004–2009

    Academy professor and ICDM award

    He is an Academy Professor from 2004 to 2008 and director of HIIT in 2009. He receives the 2009 IEEE ICDM Research Contributions Award for pattern discovery work that includes his team's research on finding episodes in sequences.

  7. 2009–2022

    President of the Academy of Finland

    He serves as Aalto University's vice president for research and education from 2009 to 2012. The Finnish government then appoints him president of the Academy of Finland, the national research council, and he holds the post from March 2012 to 2022. In March 2022, he returns to Aalto University as a professor to prepare an initiative on data analysis and artificial intelligence.

  8. Since October 2025

    AI strategy at Aalto

    He directs House of AI, a multidisciplinary research centre that Aalto establishes in 2024. In October 2025, he also becomes Aalto's Associate Vice President, AI Strategy and Adoption, a two-year post, while remaining a professor in the Department of Computer Science.

  1. Google had the most people shaping AI every year from 2014 to 2025Our estimates of which organizations employed the most people shaping AI from 1961 to 2025, with a year-by-year chart.
  2. The United States employs an estimated 53% of people in our data with a known employment countryOur estimates of where AI careers are concentrated now and how countries’ shares of dated positions changed over time.
  3. 46% of living people in our data with known birth and employment countries work outside their birth countryOur estimate of cross-border careers in AI, from country of birth and the country of each current organization.
  4. More people shaping AI studied at Massachusetts Institute of Technology than at any other institutionOur estimates of where the people shaping AI studied and where their careers led, from education records in cited biographies.

Colleagues

People named in this biography, and people with dated positions at the same organization in the same years.

Sources and credits

Photo: We have no published photo of Heikki Mannila yet. Send us a free-licensed photo.

  1. Heikki Mannila | Aalto University aalto.fi. Checked 19 October 2026.
  2. Heikki Mannila - Wikipedia en.wikipedia.org. Checked 19 October 2026.
  3. Short biography users.ics.aalto.fi. Checked 19 October 2026.
  4. Efficient Algorithms for Discovering Association Rules - Aalto University's research portal research.aalto.fi. Checked 19 October 2026.
  5. Heikki Mannila - winner of ACM SIGKDD 2003 Innovations Award (KDnuggets News 03:15) kdnuggets.com. Checked 19 October 2026.
  6. 2009 IEEE ICDM Research Contributions Award: Professor Heikki Mannila icdm.zhonghuapu.com. Checked 19 October 2026.
  7. Heikki Mannila takes office as President of the Academy of Finland | Department of Computer Science [pre 2018 site] archive.cs.helsinki.fi. Checked 19 October 2026.
  8. How can new fields benefit from data analysis and artificial intelligence? Heikki Mannila returns to university to develop multidisciplinary collaboration | Aalto University aalto.fi. Checked 19 October 2026.
  9. House of AI Brings Together AI, Domain Expertise, and Agile Research to Solve Industry Challenges | Aalto University aalto.fi. Checked 19 October 2026.
  10. Heikki Mannila appointed as Aalto University’s Associate Vice President, AI Strategy and Adoption | Aalto University aalto.fi. Checked 19 October 2026.