About us


SJM Construction and Development Group, seated in Warsaw Powązkowska 15 St. is a group of construction – property developer. The group is present in to the Polish real estate market since 2004 on the markets of the largest Polish cities: Warsaw, Lodz, Poznan and Wroclaw. The company’s plans for the next 5 years is to build approx. 100,000 sqm of completed, emerging and planned investments. Moreover, the board which consists of people with 30 years of experience in civil engineering, is looking for new projects in Poland.

Acting on the principle of management, SJM outsources all needed services to proven partners chosen from among acknowledged on the Polish market, contractors and suppliers.


Yair Hamburger

Director and owner of insurance companies and investment funds. Founded in 1982, Harel Insurance Investments & Finances Ltd. is a dynamic investment company operating mainly in the insurance sector, as well as in real estate and the capital market and other areas. Harel Insurance Investments & Finances Ltd. is a public company listed on the Stock Exchange in Tel Aviv and controlled by the Hamburger family.


Amiram Sivan

Owner of a grup of construction companies operating in both Israel and abroad – Amiram Sivan Ltd., Rolider Ltd. (Israel), Rolider Ltd. (Ghana). Mr. Sivan is also a co-owner of Rolzur Ltd, which is the biggest privately owned company dealing with boring and building tunnels in Israel. Moreover, he is a co-owner of SJM Construction & Development Group in Poland.

Amiram Sivan also owns Construction company in Ghana, which implements civil infrastructure projects.

Zvi Biran

Has over 20 years experience in the real estate industry, where he was involved in many vast projects. Moreover Mr. Biran has experience in financing and was the leading insurer on the Israeli capital markets in the years 1987-2002.