Integral Group’s Practice in California Continues to Grow


We are excited to welcome Lloyd Mariner, PE, LEED AP as Managing Principal of Integral Group’s Oakland office.

Lloyd joins Integral Group with over 25 years of experience in the engineering, building design and construction industry including lighting, power, IT, facilities management, commissioning, sustainability and low energy use “high-performance” building technologies. Lloyd is a University of Colorado, Boulder graduate with a BS in Architectural Engineering (Electrical), MS in Business Management and MS in Telecommunications.

Lloyd brings his passion for people and focus on developing and supporting multidisciplinary teams in the delivery of high quality services to clients. He will be responsible for business development, growth and support of engineering and consulting teams and fostering client relationships. For Lloyd, sustainability is a core fundamental belief that we can make our world a better place, together.

“I’ve long admired Integral Group’s commitment to innovative and highly sustainable design approaches to their projects. I am very excited to bring my 25 years of design experience to the Bay Area and to provide leadership and support of our engineering and consulting teams already stellar portfolio of work that Integral Group has built. I look forward to working with and learning from all of the very talented people that have Integral Group a leader in the design industry!


We are proud to announce the promotion of Eric Solrain, PE, LEED AP to Senior Principal, USW Engineering Design Leader.

Eric has been dedicated to the growth of the Oakland practice by delivering innovation and sustainable solutions to our clients. With a focus on architectural and social significance, sustainable and efficient systems, and cost- and maintenance-conscious designs, Eric brings a calm and reliable creativity to the art of engineering. He will be responsible for leading the engineering practice and focused on delivering engineering excellence to our clients.

“I’ve focused my career on delivering innovation and sustainable outcomes to our clients. I’m thrilled to lead our USW Engineering practice and continue to grow Integral Group as the leading deep green engineering firm in the business. I look forward to serving Integral Group’s talent, and continue to grow both current and new client relationships.”


We are thrilled to announce the promotion of Andréa Traber, LEED Fellow, to Senior Principal, USW Sustainability + Resilient Design Leader.

Andréa’s career has been dedicated to sustainability at a diverse scale from buildings to communities. Andréa’s work in educating and supporting staff, clients and communities in low carbon strategic development, resilience, and health and wellbeing will further accelerate growth of our practice on the west coast and leverage Integral Group’s global expertise.

Andréa will be responsible for leading and growing the sustainability team to deliver innovative, sustainable and resilient design consulting services to our clients from sites to cities across the US West region.

“Having joined Integral Group four years ago, I’ve been part of leading our team to be recognized as leaders in high performance built environment and district scale solutions.  I am excited to grow Integral’s presence in sustainability and resilience, expanding our reach throughout California and the west coast region and to accelerate our collective efforts addressing impacts of climate change head on.”    


We are pleased to welcome John Gautrey, PE, LEED AP as Senior Principal in Integral Group’s Los Angeles office.

John joins Integral Group with over 30 years of experience in mechanical engineering design, team and project management for multidisciplinary projects. His mechanical engineering experience encompasses higher education, K-12, sports and recreation, cultural and performing arts, and civic facilities.

With a mechanical engineering background originating from fixing antique steam engines during his college years, John grew into project management of largescale projects in the United Kingdom and the United States, working for world-class architects including Richard Rogers, Rem Koolhaas, Diller, Scifido Renfro, Morphosis, Richard Meier & Partners and numerous other premier architects and clients.

John thrives working on innovative projects that challenge him, and he constantly focuses on finding the right solution for his client. He believes that designing sustainable projects is the right thing to do and results in healthy and beautiful spaces to live and work in.

“I am tremendously excited to join Integral Group’s Los Angeles office. As I have focused my career on serving clients, my philosophy has been to invest in these projects at a personal level where passion and commitment turn into highly successful projects. Integral Group has built a thriving and growing practice with similar values and I am looking forward to the opportunity to be a part of that growth in Los Angeles and Southern California.”

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