To advance recruitment and career progression of female physicists and engineers, the directors of the four NWO physics research institutes the Netherlands, AMOLF, ARCNL, DIFFER and Nikhef, have signed Gender Equality Plans. The official ceremony took place on January 22nd, 2018 at the start of the large Physics@Veldhoven conference in front of the physics community in the Netherlands. It kicked off a systematic approach to accelerate improving the gender balance in the national physics research institutes, leading to structural changes. By publicly signing the plans, the four institute directors emphasised their commitment to and the legitimacy of the agreed actions and measures for gender equality.