Our Team

meet the team

Our team boasts over four decades of expertise in the construction sector, complemented by a globally acknowledged proficiency in geopolymer chemistry and its uses. We produce GeoCement among other geopolymer-based products, and work with our sister company, Sustainable Construction Solutions, and our partner, Constructions-3D, to develop and distribute 3D construction printers, mixers, and other equipment for the application of geopolymers.
william hoff
Founder & President
Tarek Maassarani
Chief Executive Officer
Wendy Young
Office Manager

bios

William Hoff, Founder & President

With over 42 years of experience in construction specializing in concrete, structural iron, and crane operations, William brings unique skills to Geopolymer International. As an avid entrepreneur passionate about sustainable building materials, William started the company “Out of the Box Construction” in 2015 to lower the cost of building innovative structures using the latest technologies. His current focus is on geopolymers, 3D concrete printing, and modular housing. William is taking a supportive position at GPI and looks forward to spending his free time vacationing and fishing with his wife Ghanima.

Tarek Maassarani, Chief Executive Officer

With over two decades of diverse experience under his belt, Tarek has been at the forefront of initiating, designing, and steering work teams and complex social and ecological sustainability projects across the US, Africa, Middle East, and South Asia. Tarek’s journey has been anything but conventional, spanning roles such as lawyer, climate advocate, organizational consultant, dialogue facilitator, author and filmmaker, Georgetown professor, Guinness world record holder in long-distance kick scootering, and conservation researcher, living amongst hippos and elephants in a tent at the edge of a Namibian national park.

Wendy Young, Office Manager

Coming from a family with dozens of cousins and siblings, Wendy learned early on how to delegate tasks and strategically compromise. After graduating from Rice Business School, Wendy went on to work in several industries including residential and commercial construction, real estate, industrial waste repurposing, and the legal field, all while owning and operating her own catering business for 30+ years. Slowly transitioning into retirement, Wendy enjoys spending time with her twin granddaughters and supporting her son as he carries on the family passion for cooking as a chef. In addition, Wendy and her partner, Buzzy, just completed their ultimate passion project: building their forever retirement home from the ground up in only 4 months.

Geopolymers and alkali-activated materials (AAMs) are often confused, but they differ in terms of chemistry and performance. At GPI, we produce aluminum silicate-based materials for a variety of applications. We are committed to advancing materials with enhanced functionality, resilience, and sustainability, while prioritizing safety and cost-effectiveness.

Partners & Clients

We are engaged in research, development, and production of geopolymer-based sustainable construction materials, alongside the equipment to mix and print them.

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