Driven by innovation and a commitment to excellence

Stefan Rogulic brings over 40 years of experience and a deep passion for the HVAC industry to his role as Director of Optima Heating & Air Conditioning. 

After earning a degree in mechanical engineering in Europe, Stefan moved to Australia, where he channelled his expertise and vision into founding Optima in 1988. Since then, he has been the driving force behind the company’s evolution into Melbourne’s preferred HVAC design and construct business.

Stefan’s leadership is the cornerstone of Optima’s success. With a hands-on approach, he oversees all aspects of the business, maintaining a particular focus on the commercial division. His ability to build and nurture long-term relationships with suppliers, clients, and employees has cemented Optima’s reputation as a trusted partner in the industry.

Stefan is known for his unparalleled product knowledge, empathy, and unwavering optimism. He inspires the team with his dedication, strong leadership skills, and genuine commitment to fostering a positive and collaborative workplace culture. With his guidance, the company continues to deliver exceptional heating and cooling solutions across our commercial and residential divisions.

With over 20 years of HVAC industry experience, Will Castleman brings dedication, expertise, and exceptional leadership to his role as General Manager at Optima Heating & Air Conditioning. 

Overseeing every aspect of the business, Will works closely with the senior leadership team to foster growth while driving innovation and excellence across the commercial and residential divisions.

Renowned for his ability to manage complex processes, Will seamlessly coordinates multiple projects, ensuring they are delivered on time, to specification, and with the highest standards of quality. His expertise in problem-solving and team management inspires confidence among colleagues and clients alike, making him an integral leader in Optima’s ongoing success.

Will’s dedication to innovation and his focus on building lasting relationships have been instrumental in positioning Optima as one of Melbourne’s leading HVAC solutions providers. His ability to inspire his team and deliver exceptional results continues to set Optima apart in the industry.


Francine Hazelwood brings precision, integrity, and over a decade of expertise to her role as Financial Controller at Optima Heating & Air Conditioning. Francine ensures the company’s financial processes are streamlined and effective, contributing to the overall growth and success of the business.

As Financial Controller, Francine oversees critical functions, including accounts payable and receivable, payroll, and financial strategy. Her ability to simplify complex financial matters allows the team to focus on delivering exceptional heating and cooling solutions while maintaining a strong financial foundation.

Her excellent time management and communication skills ensure financial operations run smoothly, and her proactive insights help the company anticipate challenges and seize opportunities.

With her commitment to integrity and operational excellence, Francine plays an indispensable role in driving Optima’s success. Her ability to balance big-picture strategy with day-to-day financial oversight ensures that Optima remains a trusted provider of premium heating and cooling solutions.


As Office Administrator, Ora ensures the smooth running of all administrative tasks, connecting customers with consultants and providing critical support that allows the team to deliver exceptional service. Her proactive approach, keen eye for detail, and unmatched organisational skills keep the office running efficiently and productively.

Ora’s role encompasses a wide range of responsibilities, from managing general enquiries and scheduling appointments to overseeing office logistics and supporting internal processes. She serves as the first point of contact for customers, ensuring their needs are addressed promptly and connecting them with the right consultant for their project. Her excellent communication skills and client-focused mindset create a welcoming and professional experience for everyone who interacts with Optima.

Ora’s dedication to excellence and her ability to manage multiple priorities make her an invaluable part of the Optima team. Her efforts not only keep the business running seamlessly but also contribute to Optima’s reputation as providing the ultimate in customer service.


As Head Mechanical Engineer at Optima, Jason brings 13 years of HVAC industry experience to leading the design and execution of all projects, with a particular focus on complex commercial developments. Known for his resilience, dependability, and goal-oriented approach, he plays a pivotal role in delivering high-quality heating and cooling solutions.

Jason leads the design and construct plans for Optima’s systems, working closely with builders and architects to develop solutions that meet each project’s unique specifications, budget, and timelines. From multi-story commercial spaces to residential developments, he ensures every system is seamlessly integrated and designed for maximum efficiency.

His expertise in managing large-scale projects and navigating technical challenges ensures outcomes that align with functional needs and aesthetic goals. Dedicated to innovation and client satisfaction, Jason’s contributions have solidified Optima’s reputation as Melbourne’s trusted partner for premium heating and cooling solutions.


With 18 years of industry experience, Danee Doudas leads Optima’s commercial division as Commercial Projects Manager. An expert in managing complex timelines and navigating multiple stakeholder needs, Danee oversees every commercial project from engagement to delivery and final handover. Her ability to maintain clarity and focus in fast-paced environments ensures Optima consistently delivers exceptional results for builders, architects, and developers across Melbourne.

Once Optima is appointed for a commercial project, Danee takes the reins, coordinating closely with clients, mechanical engineers, and other key stakeholders. She excels at balancing the intricate demands of multiple projects, using her exceptional multitasking skills and critical thinking to ensure all parties’ requirements are met. Her calm and collected demeanor under pressure allows her to address challenges with confidence and precision, maintaining progress and alignment at every stage.

Danee’s leadership is invaluable to both Optima and our clients. With a proven track record of success, she continues to drive excellence in every project she manages, making her an integral part of Optima’s mission to set the benchmark for HVAC solutions.


John Polazzon plays a vital role as Operations Manager at Optima Heating & Air Conditioning. With 27 years of industry experience, John’s expertise lies in managing and streamlining operations to align with Optima’s commitment to quality and client satisfaction. He ensures all teams are equipped with the tools, resources, and schedules needed to deliver projects on time and to specification. By developing and implementing robust operational processes, John maintains the consistency and excellence that define Optima’s reputation.

John is also instrumental in maintaining strong client and business relationships. His ability to liaise between clients, suppliers, and internal teams ensures that expectations are not only met but exceeded. He is deeply committed to delivering outcomes that reflect Optima’s dedication to quality, innovation, and customer satisfaction.

With his extensive industry experience and strategic approach, John has been pivotal in shaping Optima’s operations. His ability to manage multiple, complex processes while maintaining a focus on client outcomes makes him an invaluable leader within the company and a driving force behind its success in Melbourne’s heating and cooling industry.


Michael brings over 20years of HVAC industry expertise to his role as a Sales Representative at Optima Heating & Air Conditioning. 

Known for his approachable and down-to-earth style, he makes the process of choosing heating and cooling solutions simple and enjoyable for clients. His goal is to ensure that every customer feels valued and informed while finding the perfect system for their needs.

Michael’s exceptional communication skills and adaptability allow him to connect with a diverse range of clients, from homeowners to builders and architects. He takes the time to understand their specific requirements and goals, offering tailored recommendations that align with their project’s design, budget, and energy efficiency objectives.

Michael is committed to securing the best possible outcomes for his clients. Whether it’s discussing product options, managing timelines, or addressing challenges, his calm and solutions-focused approach inspires confidence and builds lasting relationships.