Hourani worked for a short while in
Detroit's Giffels & Rosetti; he returned to Lebanon for a while and moved back to the US in 1971 where he was employed with an architect in Phoenix. In 1972, he founded Lenert Hourani & Associates Structural Engineering with structural engineer Don Lenert. In 1975, the business was renamed M. Hourani & Associates after Lenert retired. In the 1980s Hourani obtained financing from Lebanese and European investors to fund large-scale real estate projects in Houston. Soon afterwards, the
Early 1980s recession hit and many developers went bankrupt. Hourani could not complete his building projects because he could not obtain loans from the distressed banks; his foreign investors bailed out and asked to be compensated. He was able to pay the investors back by focusing on other projects. In 1983 he established Medistar, a
healthcare real estate development company. In 1989 the U.S. Congress established the
Resolution Trust Corporation, an asset management company charged with liquidating assets, primarily
real estate-related assets such as mortgage loans, that had been assets of
savings and loan associations (S&Ls) declared insolvent by the
Office of Thrift Supervision (OTS) as a consequence of the
savings and loan crisis of the 1980s. According to Hourani, the RTC refused the remaining loan funds and wanted him to immediately pay off his loans on the uncompleted projects. He asked the RTC to continue funding his loans; he offered his "personal real estate and investment lands as additional collateral to the RTC". The RTC took and sold Hourani's land at low prices leaving him with debt. Afterwards, Hourani was sued for over a $250 million and his lawyers recommended that he files for bankruptcy; he refused and paid off his debt to the banks and to his investors. In the 1990s, Hourani's healthcare real estate development business resumed successfully; one of his major clients was
Healthsouth. Hourani's firms again faced adversity when Healtsouth was almost dissolved when main management figures were arrested and charged with bribery and fraud. Medistar picked up with other clients.
Inventions In the 1970s, Hourani pioneered the use of
prestressed concrete for the enforcement of slabs on grade and retaining walls. In 2002 Hourani patented window braces designed to resist
Category 4 and 5 hurricanes; he also conceived proprietary technology for an oil skimmer inspired by the
1989 Exxon Valdez oil spill disaster in Alaska, and the
2010 Deepwater Horizon oil spill in the Gulf of Mexico. Hourani came up with the idea of a HEPA air scrubber that neutralizes SARS-CoV-2 in March 2020. His company Medistar and researchers at the University of Houston and
Texas A&M University cooperated to create the Integrated Viral Protection (IVP) Biodefense Indoor Air Protection System, which was launched in August 2020. The filter is sold through Medistar subsidiary Integrated Viral Protection; it is a mobile
HEPA air scrubber equipped with layers of hyper-heated nickel foam mesh that trap and neutralize airborne pathogens, including viruses, without affecting ambient temperature. The proprietary nickel foam air filter at the core of the device was designed by
Zhifeng Ren, the director of the Texas Center of Superconductivity at the
University of Houston. The IVP scrubber almost completely eliminates SARS-CoV-2 from the ambient air.IVP rolled out in 2021 in a number of Texas schools, medical and nursing care establishments, and hotels among other facilities. The IVP scrubber was peer reviewed by the
MIT and the
Argonne National Laboratory, and it underwent regulatory procedures by the
FDA, the
EPA, and the
CDC, which define IVP as a
Type 2 medical device. == Awards and recognition ==