After receiving a degree from the Southern California Institute of Architecture in 1980, Hertz went on to work in the office of Frank Gehry before founding his firm, Syndesis, in 1983.

[3] That year, Hertz developed Syndecrete, a form of concrete that incorporates post-consumer and industrial waste, such as polypropylene carpet fibers and fly ash.

It is lighter than traditional concrete and may have other waste products such as wood, crushed glass, or plastic chips added for decoration.

[9][10] Hertz's recent speaking engagements include a presentation at TEDx in 2013 and 2015 promoting sustainability and green building.

[11] In 2014, American Institute of Architects (AIA) featured residences designed and built by Hertz in the Los Angeles Monograph Tour.

[13] In 2016, he spoke at the Greenbuild Expo in Los Angeles on historical and cutting-edge technology of extracting drinking water from the air.

[16] In April 2017, Hertz sold his home residence known as "Californication House" for US$14.6 million[17] and purchased Tony Duquette's former property in Malibu.

[20] Hertz is a board member of Heal the Bay,[21] an environmental advocacy group based in Santa Monica, California.

[26] Additionally, Hertz designed the large Syndecrete walls to work as a solar sink, absorbing the sun's heat during the day and slowly releasing it at night.

[28] In 2010 Hertz completed the renovation of an existing 45,000 square foot concrete warehouse for Mullin Automotive Museum in Oxnard, California.

[31] In 2013, Hertz completed his most ambitious and widely recognized project, the 747 Wing House in the Santa Monica Mountains.

The 747 Wing House has been featured in multiple magazine articles since its building process, and many fashion and editorial shoots have taken place there.

The house was constructed like a miniature skyscraper, utilizing a heavy metal frame in a poured-concrete base, making weight-bearing walls unnecessary.

The house has multiple sustainable features, including stormwater collection, reclaimed wood, passive ventilation, and photovoltaic panels.