About MJ2 Consulting, PLLC
John Gajda, Matthew D’Ambrosia, and Jonathan Poole formed MJ2 Consulting, PLLC in October 2017 to focus on solving complex problems for clients in the concrete industry. Mr. Gajda, Dr. D’Ambrosia, and Dr. Poole have extensive expertise in mass concrete planning and analysis, construction troubleshooting, durability and service-life assessment, specialized concrete mixture development, and product development research.
In 2020, we began expanding as new associates joined MJ2 to help our growing engineering practice:
- Mr. Jon Feld joined MJ2 in early 2020 as an Associate Principal. He is a mass concrete expert and works on many projects that require thermal control plans or consulting related to mass concrete planning and construction.
- Ms. Victoria Jennings joined MJ2 in late 2020 as a Senior Petrographer and brings forensic and engineering expertise to head our petrographic services group.
- Dr. Jose Pacheco joined us in early 2022 as an Associate Principal focused on concrete service life predictions, corrosion protection, and durability of new and existing concrete structures.
- Dr. Jan Vosahlik joined in early 2024 bringing over a decade of experience in concrete workability, pumpability, rheology, mixture development and optimization, construction troubleshooting, mass concrete, new products, and technology R&D.
- Dr. Zoe Lallas joined MJ2 in 2025 with a background that combines structural engineering, experimental testing, and computational modeling tools, focused on novel materials for precast construction.
Our vision includes adding other experts as we grow to meet client needs and expectations.
