Born in 1959 in Maroussi. He graduated with honor from Athens College and from the Athens Medical University with honorary fellowship from the National Foundation Scholarship Centre. He received specialty in microbiology, which he exercises till today, while developing a significant humanitarian action.
The earthquake in Pakistan and the tsunami became the major turning point for his humanitarian career. Nikos with a few other veterans of humanitarian missions, founded the «Doctors of Peace» where he was the founding chairman and remains so today. Through the years 2006-2007, he conducted numerous missions in Lebanon, with highlighted mission the one in which his underage daughters, Demetra & Lucia, delivered humanitarian aid to Shiite orphanage hand in hand.
In 2008, after months of efforts, «Doctors of Peace» manage to carry legally from Iraq a woman who successfully donated kidney to her son a young refugee from Iraq, who was at the last-stage of renal failure. It was a huge operation which moved the Greeks but also the Iraqis as well, and became known as «The Rescue of Nariman».
At that same year, the «Doctors of Peace» conducted the only Greek humanitarian aid to South Ossetia and they manage to post for their move, the official appreciation of the Russian Federation.
In 2009, he is living the crowning moment of his humanitarian career, when on January 12, manage to shake the Greeks, as Doctors of Peace were the first Greeks – and of few Westerners, who «broke» and entered the besieged Gaza Strip under relentless bombardment of Israeli aviation.
In the same year, the Doctors of Peace is the only Greek humanitarian presence in the city Aquila in Italy, heat by an earthquake. Moreover, they are the only Greek humanitarian mission and one of the few internationally -because of the very high risk- who were found next to the refugees from conflicts between governmental troops and the Taliban in Wadi Swat Pakistan, bordering to Afghanistan.
In January 2010, Nick Dusis – Rassias is with the EMAK near flooded area of Shkoder in Albania, on the border with Montenegro, and when he comes back, he departures for Porte au Prince in Haiti.