The Rohrig difference

We work side-by-side with every client to ensure we maximise the value of the building for its life.

How we achieve results

Rohrig is a commercial construction company based in Sydney and Brisbane. Since 1991, we’ve created outstanding value across a range of sectors including education, hospitality, aged care and light industrial. We work collaboratively and transparently to bring your vision to life. With family values and a strong culture, we are determined to fulfil every promise.

Our vision

We are a proudly Australian company which, through hard work, inclusion and strong leadership, activates the potential in both our people and our projects. This enables us to maximise value for our clients and for the life of each building.

Five stages where we achieve value


Initial idea

What will you build? What are the options? What are the inherent challenges? What opportunities are there to achieve more of what’s important to you, whether that’s financial success, educational outcomes, flexibility or architectural innovation?

Detailed feasibility

This is a detailed analysis of everything you need to maximise potential and avoid pitfalls. The list is long from land-zoning implications to floor-plan options and interior design. Preliminary architectural designs are created. Costings and savings become clearer.

Master-planning and development application

What do local authorities require now and for future growth (including parking)? How will utilities cope with the new demand? Will the façade comply? 3D modelling and every detail of design is considered for buildability, practicality and life-cycle value. Proper preparation for development application is a major time-saver and cost-saver.

Design documentation and building approvals

While making sure everything is compliant with Building Code of Australia constraints, we also develop detailed specifications, evaluating everything from upfront capital investment in equipment to long-term running costs of components. Clarity at this stage saves expensive changes later.


If we’ve been with you from the start, we’ve tested your plans for 360-degree value. Even at this stage, we can value engineer with recommendations for design or materials adjustments. We stage works to keep your business operational. And our quality build and finishing consolidate the value.

Our team

Many of our team members have been with the company decades, some even since the beginning. This gives us stability and mature knowledge, which we balance with fresh ideas from the next generation of managers. We share a strong culture of achievement and integrity.

Glenn Rohrig

Founder and Managing Director

Determination, loyalty, reliability, integrity – just some of the words that clients use when talking about Glenn Rohrig. From his first successful project for an aged care facility in 1991, Glenn has built his business on treating clients, employees and subcontractors with respect and fairness. Mixing construction experience with a solid business education, he imagines better outcomes and achieves them.

Alexei Avsenev

General Manager - QLD

Alexei has over 18 years of construction experience as foreman, project manager and construction manager. His Bachelor of Applied Science (Construction Management) and experience of diverse clients and sectors make him an insightful and knowledgeable leader. He has exceptional skills in project planning and management, with the ability to build and lead an effective team and to oversee all details for quality and value.

Gavin Fraser

General Manager - NSW

Calm and confidence-inspiring, Gavin brings 30 years of construction experience to his role with Rohrig. His career evolution from joiner and carpenter to estimator and then general management has given him a broad and deep perspective on all aspects of construction. He nurtures strong lines of communication with clients and site teams, overseeing the multiple facets of major projects.

David Vokes

National Operations Manager

David has been with Rohrig since 1991 and was the main business-winner in the company’s early years. His ambition to work on large projects for a Tier 1 company drew him away for seven years but he returned to us with invaluable experience for our growth. He spearheaded the opening of our Sydney operations and then moved back to Brisbane as Business Development and Estimating Manager. He shares deep industry knowledge and has a tireless drive to give every client lasting value.

John Demnar

Business Development Manager

John has over 15 years of experience delivering construction projects and he brings exceptional practical insight and technical knowledge to his role as Business Development Manager. For the past nine years, he has managed projects across all of Rohrig’s sectors so he can also give realistic sector-specific advice and guidance when exploring the project possibilities and challenges. With highly-developed customer-service principles, John is a trusted advocate for your project, ensuring all your expectations are met in the most effective way.

Shane Stoddart

Design Manager

With a Bachelor of Urban Development (Construction), diverse project management experience and the ability to unpack the real drivers of projects, Shane has a finely-tuned ability to get to the heart of project briefs and find solutions that please all stakeholders. His attention to detail and extensive knowledge make him an expert at finding the value opportunities in each project. A great leader and communicator, Shane’s collaborative and honest approach is the foundation for success.

Robert Nott

Senior Construction Manager

Robert has been a pillar of Rohrig’s success since the first days of the company in 1991. His leadership and construction experience on a wide range of major projects bring exceptional insight to achieving clients’ objectives. He is both a ‘solution finder’ and cultural role model, both friendly and focused. His people skills match his technical knowledge and financial acumen, inspiring Rohrig teams to achieve their best every time.

David Campbell

Construction Manager

With 15 years in construction, David is an enthusiastic and goal-orientated manager who has high-level skills in programming and construction methods. With an Advanced Diploma in Project Management and an Advanced Diploma in Building and Construction Management, he brings effective guidance to projects in all sectors. He especially enjoys value engineering, helping clients achieve cost savings without sacrificing quality.

Matthew Tucker

Construction Manager

Having risen through the ranks at Rohrig, Matthew has been with us since 2006 and brings wide-ranging expertise and a Bachelor of Urban Development to the construction manager role. Matthew is widely respected for being firm but fair in managing subcontractors and for facilitating collaboration between our design team and clients’ stakeholders to ensure every project meets its full potential and is completed on time and on budget.

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