George Calvar brings over three decades of expertise in the concrete industry, with an extensive background in laboratory management, concrete technology, and materials testing. Beginning his career with hands-on experience in concrete placement and pumping, George’s journey evolved into pioneering roles in laboratory operations and technical support. His exceptional knowledge spans all aspects of concrete technology, materials testing, and quality certification, making him a valuable asset to any project.

George’s remarkable accomplishments include establishing and accrediting the G-Lab Materials Testing Laboratory, developing innovative concrete mixes, and implementing advanced laboratory management systems. His leadership as Technical Manager at Gunlake Concrete is marked by his dedication to driving customer satisfaction and ensuring compliance.

Throughout his distinguished career, George has been recognized for his outstanding contributions, earning prestigious awards for his operational excellence and commitment to safety. George’s passion for innovation and commitment to quality continues to set new standards of excellence in the construction materials industry.

Paul has over 30 years’ experience in ready-mix concrete operations and sales. Paul began his career in the industry in the late 80’s with South Coast Pre-mix, a small independent concrete manufacturer in the Illawarra, driving concrete agitators, batching & allocations. Paul also worked with CSR Readymix in the 1990’s during the Sydney Olympics boom. Paul then progressed into Concrete batch plant Management & Sales roles with Hy-tec before joining Gunlake Concrete in 2015 with a dual role in Sales & Plant Management. Paul has extensive knowledge and experience in many facets of the Concrete industry including batch plant operations and processes, sales & a strong technical background of concrete mixes.

Cody brings over 16 years of concrete industry experience, rooted in a family legacy spanning four generations in cement and concrete. Starting as a concreter, Cody advanced through roles as an Agi driver, Yardsman, Batcher Allocator, Sales Rep, and Plant Manager. Now serving as the Area Manager for Western and South Western Sydney at Gunlake, Cody leads with a focus on exceptional customer service and mentorship for colleagues. His extensive industry knowledge and dedication ensure outstanding performance and client satisfaction.

M: 0497 502 140

John’s top priority in his role is ensuring customers receive the highest level of service whilst still balancing the needs of the business. He brings over 15 years of sales and business development experience to the team at Gunlake and enjoys managing customers, projects and relationships. John graduated with a Business Degree from UTS and has worked across a range of industries with leading organisations including Oliver Footwear, Brambles-CHEP, Hanson Concrete and Coates Hire. John’s genuine commitment and care, coupled with his effective communication skills, results in him having extremely strong relationships and inspires him to utilise new processes and technologies to consistently exceed expectations.

M: 0439 224 965

George has been working within the concrete industry for over 30 years. He holds a Diploma in General Mechanic’s and first-class Machinist (Technical College – North Lebanon). George began his career with the Portland Cement Company in North Lebanon (Currently owned by Holcim), as Production and Operation’s manager with BHP Steel. He then went on to TNT, Visy Board, Rheem Australia (Operations/Production Manager and sales), and in 2003 until 2017 George worked at Hanson Concrete as their Major Accounts Manager. George joined Gunlake Concrete in 2017 as their Senior Accounts Manager.

George has completed numerous management, leadership and industry related courses and is proud to focus his future at Gunlake, a company with a strong commitment to customer satisfaction along with excellent service and world-class, quality concrete.

M: 0477 220 345

Hrvoje brings over 13 years of experience in the concrete industry, starting as a concreter and pump operator in his family’s business while pursuing full-time university studies. Upon graduating with a Bachelor of Construction Management in 2015, he transitioned into the technical department of the concrete ready-mix industry. Over five years at Holcim, Hrvoje diligently monitored, developed, reported, and optimised the technical performance and quality of concrete work.

In 2020, seeking new challenges and opportunities, Hrvoje joined Gunlake Concrete to provide technical support to the Sydney Metropolitan area. In 2024, he assumed the role of Account Manager, leveraging his extensive industry knowledge and experience to foster strong and enduring relationships between the company and its clients. Beyond managing accounts, Hrvoje serves as the primary point of contact, advocate, and strategic advisor, ensuring exceptional service and satisfaction for all clients.

Patrick graduated from the University of Western Sydney in 2012 with a Bachelor of Business and Commerce, majoring in Accounting. He began his career in the construction industry by joining Hanson Construction Materials’ Graduate Management Development Program in 2013, gaining experience across the Ready-Mix Concrete and Hard Rock and Sand Quarry supply chains.

From 2015 to 2022, Patrick held various key roles at Hanson, including Plant Manager for Bathurst and Lithgow, Project Manager for the North Rapid Transit Concrete Supply (Sydney Metro), Mobile Plant Manager for the Carmichael Rail Network Project in Queensland, and Technical Manager for the Major Infrastructure Project Team on Sydney Metro. Most recently, he operated the onsite Wet-Batch Concrete Plants, servicing the Pavement Team for the Western Sydney Airport project with Acciona, and the M12 West project with CPB.