Our leadership
Deep industry expertise with a strong commitment to our people, our clients and the long-term success of every project.
Mark Ruff
Chairperson
Director
Mark Ruff
Director
Chairperson
Mark has built his career in construction, motivated by both people and projects. His early onsite experience, combined with formal construction qualifications and an entrepreneurial mindset, enabled him to grow Qanstruct into the company it is today.
As Chairman, he provides strong, practical leadership and plays a key role in shaping the company’s long-term direction. His ability to build long-standing relationships and inspire the wider team continues to drive Qanstruct’s ongoing success.
Damien Toppi
General Manager - Business Development
Director
Damien Toppi
Director
General Manager - Business Development
Damien began his career in project delivery before transitioning into business development and client engagement, building a network of strong industry relationships along the way.
As General Manager of Business Development, he leads the Estimating and Design teams, setting clear direction and strengthening capability across both functions. He plays a key role in guiding early project strategy, bringing a grounded approach that supports confident and considered project outcomes.
Josh Horan
Business Development Manager
Director
Josh Horan
Director
Business Development Manager
Josh started his career on construction sites and brings broad experience across contract administration and project delivery. He now drives business development activity, influencing projects from inception through the tender phase and helping shape strong commercial and delivery outcomes from the outset.
Known for his practical approach, Josh builds trusted client relationships and plays a key role in identifying opportunities that align with Qanstruct’s capability.
Charlie Rico
General Manager - Project Delivery
Director
Charlie Rico
Director
General Manager - Project Delivery
Charlie grew up around construction and has worked across project management and delivery since joining the business after university. His extensive experience has contributed to delivering strong value through a design and cost perspective.
As General Manager of Project Delivery, he leads project management and contracting, with a focus on reliable delivery and building trusted relationships with clients.
Clem Perin
General Manager - Construction
Director
Clem Perin
Director
General Manager - Construction
Clem started his career on the tools and built his construction expertise from the ground up.
As General Manager of Construction, he leads both the Construction and Safety teams, instilling a strong focus on practical delivery, safety and doing the job right.
His leadership is grounded in real site experience and a deep understanding of how projects are successfully built in the field.
Tim Nimmo
Chief Executive Officer
Tim Nimmo
Chief Executive Officer
Tim holds qualifications in construction and management and has experience across pharmaceutical, media and logistics & distribution industries. He has also worked as a consultant across a range of large implementation and business improvement programs.
As CEO, he leads the operational team and is responsible for growing the capability and performance of the business and its people.
Adam Kaerger
Chief Financial Officer
Adam Kaerger
Chief Financial Officer
Adam is certified practicing accountant with more than 15 years experience guiding the financial direction of companies across the property industry. He is passionate about creating strong financial frameworks that enable organisations to grow with confidence.
As Chief Financial Officer he is responsible for leading the company’s financial strategy and governance framework as well as partnering with operational leaders to support strong commercial outcomes.
Grace Brandon
Chief Strategy Officer
Grace Brandon
Chief Strategy Officer
With a background in marketing and communications, Grace has built her career helping organisations communicate clearly, think strategically and deliver meaningful outcomes.
As our Chief Strategy Officer, Grace supports business planning, communications and strategic initiatives across the business. She works closely with teams to shape messaging, find alignment and turn strategy into practical action.
Bill Draper
National HSE Manager
Bill Draper
National HSE Manager
With a strong background in health, safety and environment across the construction industry, Bill has built a reputation for driving a proactive safety culture and consistent national standards, with a key focus on engagement across internal and external partners.
As National HSE Manager, he leads the HSE team, working closely with site and leadership teams to embed proactive and practical safe systems of work, drive compliance and support continuous improvement across all project sites and workplaces.
Tim Vayenas
People & Culture Manager
Tim Vayenas
People & Culture Manager
Tim brings broad HR experience across a range of industries, with a focus on building strong, engaged and well-supported teams. He has led both operational and people-focused roles, helping create environments where people can do their best work.
Working closely with leadership and key stakeholders, Tim takes a practical, collaborative approach to aligning people and culture initiatives with Qanstruct's values and strengthening culture across the business.
Andrew North
General Counsel
Andrew North
General Counsel
Andrew brings extensive experience as a lawyer, having started his career in-house in the construction industry with a focus on civil and industrial engineering and rail infrastructure. Through private practice, he has acted for developers and contractors across a broad range of construction and renewable energy projects.
As General Counsel, Andrew supports Qanstruct’s CEO and business units on construction, commercial, insurance, risk, employment and governance matters, providing timely and commercially aware guidance aligned with Qanstruct’s strategic objectives.
