Since 2010, Filip Wejman is a member of the committee grading papers submitted to a national competition Droga na Harvard (The Way to Harvard). The Harvard Club of Poland organizes this yearly, national challenge for the benefit of young Polish people who are planning to study at Harvard.

Filip Wejman is a co-founder and member of the board of INPRIS, a legal think tank.  INPRIS, founded in 2008, courts, judges, legislative process and other questions of governance that have to do with law. INPRIS monitors with other NGOs the vetting and election process of Justices of the Polish Constitutional Tribunal and the Supreme Court, works on legal infographics, conducts research on access to legal aid in Poland, offers training and workshops.

Filip Wejman and Magdalena Siwanowicz-Suska are among the four founders of the Warsaw Chapter of Legal Hackers. We have organized sessions on GDPR, blockchain, fake news, algorithms, EU copyright directive, cybersecurity, artificial intelligence, cyberwar.

In 2012, 2014 and 2016 the Holda Association organized three editions of the Constitutional Moot Court. The national moot involves students from many law schools and attorney trainees as competitors, and top lawyers from judiciary, academia, law firms as judges. Filip Wejman was among the initiators and organizers of the moot.

Since the founding of the Program in 2004, Filip Wejman sits on the Board of the Precedent Litigation Program at the Helsinki Foundation for Human Rights. The job of the Board is admitting cases to the Program and laying out guidelines for further action. The Program deals with the vast share of high profile human rights and constitutional law cases in Poland.

Katarzyna Leśko is active as a pro bono lawyer at the Association Springtime. The charity sends out every year thousands of free Christmas parcels to people in need. In 2013, the project reached over 17 000 families.