Joseph Rosenbaum is Chairman and Founder of CityBook Services, which he established, together with Mr. Abish Brodt and Mr. Elliot Zaks in 2003. Mr. Rosenbaum is also Chairman of US-based Madison Commercial Real Estate Services, which offer a full suite of commercial real estate services, and is President of Diversified Capital, Inc., a real estate holding company. Based in Lakewood, New Jersey, Mr. Rosenbaum holds a Bachelor's degree and Master's degree from Beth Medrash Govoha College.

Eli Kazhdan is CEO of CityBook Services, Ltd. He earned his BA with Honors from Harvard University in Government and International Relations, and his LLB from Hebrew University of Jerusalem. Prior to his current position, Mr. Kazhdan was the CEO of StartUp Jerusalem, an economic development corporation focused on attracting investments to Jerusalem and creating employment opportunities in Israel’s capital. From 1996-2002, Mr. Kazhdan served in senior economic positions in the Israeli Government. He was the Chief of Staff in the Ministry of Industry & Trade, and then the Chief of Staff in the Ministry of Interior – and was intimately involved with the policy development of these two ministries.

Noach Sumner is CTO of CityBook Services. He holds an MSC in Cybersecurity from Yeshiva University and an Honors BA in Economics from York University. Prior to his work at CityBook, he ran his own MSP firm, serving as CTO of the Nefesh B’Nefesh organization for 10 years, while also servicing many additional small businesses. Mr. Sumner holds a CISSP certification from (ISC)², along with a variety of other IT certifications.

Yocheved Katz is the Office Manager & Payroll Controller of CityBook Services. She has been with the company since 2003, serving key roles in its initial establishment and continued expansion. She previously served as Senior Advisor and Chief of Staff of the mayor of Modiin Illit.

Yocheved Granofsky has been Director of Human Resources for CityBook Services Ltd. since 2015. Prior to her work as the Director of HR at CityBook, she had served for 9 years as CityBook's Associate HR Director. Prior to her tenure in CityBook, she worked in the venture capital, high-tech and business world in Israel in various administrative roles. Ms. Granofsky has deep experience in the full spectrum of Human Resources activities, including recruitment, employee rights, legal issues and employee welfare and benefits. Ms. Granofsky holds a BA from Thomas Edison State College.

Mark Sloman is the Director of Outsourcing Services at CityBook Services. Previously, he founded and managed a business consultancy providing operational and financial guidance to US and European companies. He also has served as a contractor to the US Departments of State and Defense, serving in diverse roles in Europe, Asia and the Middle East. He earned his BA in Political Science and Soviet Studies from Wittenberg University and MA in International Relations from American University in Washington, D.C.