Building our reputation on Solutions.

Leadership Team

David Guille
Executive Chairman, FCA

“The construction industry is about solving problems and making ethical decisions when providing solutions. Marcus and I won’t cut corners to make a quick buck.”

David sets the strategic direction for our group of specialised construction companies based in Perth. Thirty years’ experience in the commercial and private sectors as a Chartered Accountant, enables him to identify opportunities early, he then allocates the necessary financial and human resources for successful realisation.

Since starting Building Solutions with Marcus Kotsoglo in 2005 and subsequently Building Development Solutions (Aust), David has developed a highly focused, tailored and lean business model. This supporting framework enables us to grow, innovate and add value.

A strong believer of Lean Construction, David helped establish the Lean Construction Institute - Australasia Ltd (LCIA), a unified not-for-profit organisation that promotes lean construction principles, tools and techniques for commercial and academic organisations in the energy, infrastructure and construction industries.

You can view the Institute of Chartered Accountants’ feature article on David’s passion for business, ”Turning Visions into Reality”, or The Builders Choice magazine feature article “Up Close & Personal with David Guille” to understand the ethos behind Building Solutions.

Qualifications & Memberships:  A Fellow of the Institute of Chartered Accountants in Australia (FCA), Founding Director & Company Secretary of the Lean Construction Institute Australasia Ltd (LCIA) 2014-16, Member of Australian Institute of Company Directors (MAICD) 2010-14.

View David Guille's profile on LinkedIn

David Guille


Marcus Kotsoglo
Managing Director, Registered Builder

“We understand construction and we understand finance. It’s the perfect combination for growth and longevity in an ever changing industry.”

Marcus understands every aspect of the building process, from the paperwork to the finished product. These skills make him the best person to oversee the design, construct and project management side of the business.

During his 30 years in residential, commercial and industrial development and construction, Marcus has acquired comprehensive abilities and strong connections that benefit all stakeholders. His aptitude at establishing and nurturing long term relationships with preferred contractors enhances productivity and helps deliver a seamless project to the client.

Qualifications & Memberships: Associate Diploma Applied Science Building, Builders’ Registration Board - Registered Builder.

View Marcus Kotsoglo's profile on LinkedIn

David Guille

With 60+ years of experience, we deliver end-to-end building solutions on time and on budget for developers.

 1300 77 88 99 Contact Us