Tina brings over 20 years of experience as a highly accomplished Executive Assistant, providing exceptional administrative and organisational support to directors, senior executives and managers across diverse industries and government sectors. She understands the critical importance of being proactive, ensuring key personnel are organised, well-prepared, and equipped to perform their duties effectively.

Throughout her career, Tina has consistently been recognised for her dedication, efficiency, and professionalism, earning promotions and expanded responsibilities because of her strong leadership skills and ability to manage teams successfully. Her reputation is built on problem-solving through lateral thinking, a commitment to excellence, and unwavering integrity, respect, and strong values.

In addition to her executive support roles, Tina served as Secretary of the Australia–Chile Chamber of Commerce from 2008 to 2010, further demonstrating her versatility and capacity to contribute at a strategic level internationally.

Our People

Andres Donoso

Director

Andres Donoso is a commercially driven executive with more than 15 years of experience leading business operations, strategic growth initiatives and complex project portfolios across the construction, engineering, defence and mining sectors. As Director of D&S Resources, he has been instrumental in positioning the business as a high-performing SMP contractor and multidisciplinary project delivery partner, with the company recognised as a 2025 BDO Fast Mover for outstanding growth and commercial performance.

Joe Kelly

Director

Joe is an experienced project professional and an exceptionally skilled Construction Manager, known for overseeing large-scale projects with precision and expertise. His career in the construction industry, marked by significant achievements, laid a solid foundation for his transition into the mining sector, where he has truly excelled, showcasing his extensive trade experience.

Chris Meulengraaf

Workshop Manager

Christopher Meulengraaf is an experienced mechanical engineer and business leader with decades of expertise across engineering, construction, maintenance and industrial services. As Workshop Manager for D&S Resources, Christopher oversees the delivery of high-quality fabrication, assembly and maintenance activities, ensuring strong technical standards and safe, efficient project execution.

Tina Durdin

Executive Assistant

Tina brings over 20 years of experience as a highly accomplished Executive Assistant, providing exceptional administrative and organisational support to directors, senior executives and managers across diverse industries and government sectors. She understands the critical importance of being proactive, ensuring key personnel are organised, well-prepared, and equipped to perform their duties effectively.

Austen Robjohns

Major Projects - Manager

With over two decades of experience in remote mineral processing, mining, and construction environments, Austen Robjohns has built a distinguished career as a Senior Project Manager known for delivering complex infrastructure projects on time, within budget, and to the highest safety standards. His hands-on background in mechanical trades, combined with formal qualifications in management and Lean Six Sigma methodology, underpins his practical and results-focused approach to leadership.

Corey Milligan

Construction Manager

Corey is a dedicated project supervisor with over five years of experience managing complex and high-value civil works. Throughout his career, Corey has developed a deep and nuanced understanding of the intricacies involved in both small and large-scale civil projects, demonstrating an exceptional ability to lead projects from inception to completion.

Lucas Marsh

Safety Manager

With extensive experience in workplace health and safety, Lucas Marsh joins D&S Resources as Safety Manager, bringing a strong track record across major infrastructure, mining, and energy projects. His career spans over a decade, leading safety outcomes for state-significant developments and national operations, where he has consistently driven risk management excellence and built a culture of safety.

Aimee Herriman

Governance Manager

Aimee is a Governance Manager with four years of dedicated experience in the private, corporate sector. She specialises in identifying potential areas of vulnerability and risk, with a keen focus on the development of new legal and contractual obligations. Her role is pivotal in safeguarding the organisation against unforeseen liabilities and ensuring compliance with relevant laws and regulations.

Albert Lu

Chief Financial Officer

Albert is a CPA and ACCA-certified accountant, bringing over 15 years of extensive experience to the financial sector. His expertise spans a wide range of critical financial functions, including tax consolidation and compliance, financial reporting and analysis, budgeting, forecasting, and payroll processing.

Daniela Astudillo

Human Resources Manager

Daniela Astudillo is an accomplished HR professional holding a University Technical Degree in Business Administration, with over a decade of experience in Human Resources. She specialises in the mining and engineering sectors, with extensive expertise in managing large workforces.

Leticia de Cesaro Gabriel

Commercial Officer

Leticia has a multidisciplinary background spanning law, intellectual property, project coordination, and commercial operations. She has worked across sectors including renewable energy, innovation ecosystems, mining, water, and infrastructure, supporting projects from early research and funding through to delivery and compliance.