In 1992 and 1993, Mr. Al Zaeem traveled to Washington DC, Amman, and Tunis as a legal advisor to the Palestinian Delegation in the peace talks. After the signing of the Oslo and Cairo Accords, he was invited to become a member of the joint Palestinian/Israeli Legal Committee, as well as to serve as the legal consultant for many other Palestinian negotiating committees.

In 1995, Mr. Al Zaeem expanded his legal services to include a range of alternative dispute resolution techniques, through participation in training programs at Harvard Law School in Boston, and the International Center for Arbitration in Texas. He has also participated in the Arab Society for Protection of Intellectual Property course in Jordan. Mr. Al Zaeem is currently a member of the Yale Law School Middle East Studies Group and the American Bar Association.

In addition to his regular practice as an attorney and arbitrator with many banks and insurance companies, Mr. Al Zaeem currently acts as the legal consultant to the United Nations Relief and Works Agency for Palestine Refugees in the Near East. Other clients include Representative Offices to the Palestinian Authority and international companies from Europe, the United States and Japan.

Mr. Al Zaeem is also well known in the academic field, whereby he spares some time for teaching commercial law at the Islamic University in Gaza (the largest University in the Gaza Strip) as well as training lawyers and professionals who are interested in the field of alternative dispute resolution.

Mr. Al Zaeem has been classified as the leading lawyer in Palestine by "Chambers Global" ( The World's Leading Lawyers ) as from the beginning of this millennium.