About us

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.

With a strong foundation in financial management, commercial law and corporate governance, Andres specialises in building scalable business models, optimising operational performance and securing long-term, value-aligned partnerships. His leadership centres on disciplined project execution, margin protection, risk management and strengthening organisational capability to support sustained revenue growth.

Andres oversees the company’s strategic direction, corporate governance frameworks, capital planning and key client engagements. He is known for his ability to interpret complex commercial environments, negotiate high-value contracts, and align project delivery outcomes with broader business objectives. His approach combines strategic foresight with a deep understanding of operational reality, ensuring decisions are both commercially sound and practically executable.

He holds a Bachelor of Commerce, a Master of Project Management, and a Master of Engineering (Management), and is a member of the Australian Institute of Company Directors. In 2020, he was named among InDaily’s 40 Under 40, recognising commercial leaders shaping South Australia’s economic future.

Andres is driven by a commitment to sustainable growth, disciplined financial management and creating measurable value for clients, partners and stakeholders. He continues to lead D&S Resources through a strategic expansion phase, strengthening its reputation as a trusted commercial partner in the mining industry.

Joe Kelly

Director

Joe is an experienced project professional and an exceptionally skilled Director, 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.

As an exemplary team player, Joe possesses advanced communication skills, adept at both external and internal stakeholder management. His meticulous approach to planning and unwavering attention to detail instill a high level of confidence in project managers working under his guidance. Joe has successfully supervised a diverse array of projects, navigating through varying levels of complexity. He demonstrates a profound understanding of the critical nature of scope, cost, and schedule management, ensuring projects are delivered on time and within budget.

Joe’s commitment to maintaining open lines of communication with clients from the inception to the completion of a project is a testament to his dedication to client satisfaction. This approach guarantees that all expectations are not only met but exceeded, securing a 100% satisfaction rate.

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.

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.

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. Albert has applied his skills across both accounting firms and large-scale corporations, demonstrating a keen ability to navigate complex financial landscapes.

His responsibilities extend beyond routine accounting tasks; Albert plays a pivotal role in minimising financial risks for the business. He is instrumental in guiding the management team through informed financial decision-making processes and identifying opportunities for cost reduction without compromising on efficiency or quality.

Albert’s dedication to excellence and continuous improvement in financial practices ensures that the businesses he works with are not only compliant but also financially robust and strategically positioned for growth.

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.

In addition to her primary responsibilities, Aimee offers high-level support to the leadership division of the business. She provides expert guidance on the legal implications of their governance practices, decision-making processes, and how these affect the organisation’s operations and strategic direction. Her insights are invaluable in helping the team navigate complex legal landscapes, thereby ensuring that their decisions are both informed and aligned with the best interests of the business.

Aimee’s comprehensive approach to governance, combined with her commitment to legal integrity and organisational excellence, ensures that the organisation not only meets, but exceeds governance standards, fostering a culture of transparency, accountability, and informed decision-making.

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.

Christopher brings deep industry experience through his long-standing leadership of SES Industrial Services Pty Ltd, with whom D&S Resources maintains a strategic partnership. Through this partnership, SES provides specialist workshop capability and support to D&S operations, enabling a scalable and highly responsive service model for our clients.

Throughout his career, Christopher has delivered major construction and maintenance solutions across the Chemical, Oil & Gas, Wine, Malting and Cement industries. He is recognised for combining strong technical expertise with practical commercial leadership.

Christopher holds a Degree in Mechanical Engineering and has maintained a Private Pilot’s Licence since 1981, reflecting his commitment to precision, technical excellence and ongoing professional development. He is an active member of the Association of Professional Engineers and the Australian Institute of Company Directors.

He also brings extensive governance experience, having served on the Pembroke School Board for more than 15 years in senior roles including Chair, Deputy Chair and Chair of Finance. During this time, he contributed to sustained enrolment growth, strong financial performance, significant campus improvement programs and the successful delivery of a $30 million middle school redevelopment.

Known for his collaborative leadership style, financial acumen and commitment to high standards, Christopher continues to provide advisory support to private companies while playing an integral role in the performance and growth of D&S Resources’ workshop operations.

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.

Throughout his career, Austen has successfully led major capital works across the mining and resources sector, managing multimillion-dollar projects from planning through execution. His project portfolio spans plant upgrades, pipeline construction, automation systems, and large-scale site infrastructure works—each completed with a strong emphasis on quality, safety, and efficiency.

Recognised for his operational foresight and strong problem-solving abilities, Austen brings deep technical knowledge and a proactive leadership style to every challenge. His ability to manage cross-functional teams, navigate complex environments, and champion safety culture has made him a key contributor to the long-term success of the projects and organisations he serves.

Corey Milligan

Construction Manager

Corey is a dedicated Construction Manager with over fifteen 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.

His expertise has been honed predominantly at BHP’s Olympic Dam site, where he has cultivated an outstanding comprehension of site safety protocols. Corey’s leadership ensures that his team adheres to the highest health and safety standards, guaranteeing the safe and efficient completion of all projects under his supervision.

Corey’s extensive management experience is complemented by his commitment to meeting deadlines, staying within budget, and achieving client satisfaction. His ability to navigate the challenges of construction management, combined with his unwavering focus on safety and quality, makes him a valuable asset to any project team.

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.

Lucas has held senior leadership positions overseeing large-scale contractor networks, developing systems aligned with WHS legislation, and guiding end-to-end safety practices—from design and construction to operations and maintenance. He is recognised for his hands-on approach, whether it’s mentoring teams, supporting drone operational compliance, or implementing robust contractor management systems for thousands of workers.

What sets Lucas apart is not only his technical capability but also his genuine commitment to people. He’s a trusted advisor and coach who builds strong relationships across all levels of an organisation, contributing to safer, smarter, and more effective project delivery.

His appointment at D&S Resources reinforces the company’s commitment to maintaining the highest standards in safety and compliance, supporting continued growth across our mining and engineering operations.

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. Her competencies include recruitment, payroll management, compliance, and the optimisation of internal processes. Throughout her career, Daniela has demonstrated exceptional proficiency in the strategic and professional management of workplace relationships.

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.

Her experience includes leading intellectual property initiatives at universities and innovation hubs, securing public funding for R&D projects, supporting technology transfer, and driving usability and process improvements in the solar energy sector. Currently based in Australia, Leticia contributes to commercial and governance functions, assisting with contracts, tenders, compliance processes, and grant applications.

With a Bachelor’s Degree in Law (specialising in Intellectual Property) and further training in project management and contract law, she combines analytical rigour with strong organisational and problem-solving skills. Leticia is passionate about building bridges between technical teams, business stakeholders, and governance frameworks to ensure structured and consistent outcomes.

Daniel Cardona Giraldo

Mechanical Engineer

Daniel is a Mechanical Engineer with over three years of experience, including the past two years with D&S Resources. With a background as an Electromechanical Technologist, he brings valuable hands-on industrial maintenance experience, supporting a practical and well-rounded approach to engineering.

He has developed strong capabilities in piping and structural design, technical documentation, and engineering analysis, contributing to the successful delivery of a range of projects. Daniel is committed to maintaining high standards of safety and quality, ensuring work is delivered efficiently and in line with project requirements.

Proactive and solutions-focused, Daniel works collaboratively within project teams and is confident coordinating tasks to drive outcomes. His ability to combine technical knowledge with practical experience allows him to deliver effective, reliable engineering solutions that support timely and successful project delivery.

Nina Liu

Civil Engineer

Nina is an experienced Civil Engineer with over three years’ experience in the infrastructure and mining sectors. In her current role at D&S Resources, she oversees large-scale projects, playing a key role in ensuring their successful delivery from planning through to execution.

Nina is responsible for managing quality assurance processes, coordinating daily site activities, and overseeing subcontractors to ensure work is completed safely, efficiently, and in line with project requirements. Her expertise includes managing ITPs, QAs, and PQs, as well as ensuring compliance across all stages of the project.

Providing technical support to site teams, Nina works closely with stakeholders to maintain progress and meet project schedules. Her strong organisational skills and attention to detail enable her to effectively manage multiple priorities while keeping projects on track.

Nina’s role is pivotal on site, ensuring projects are delivered smoothly, safely, and to a high standard.

Liam Coleman

Project Superintendent

Liam joined D&S in March 2024, bringing experience in engineering and mining since 2021. He holds a Bachelor of Mechanical Engineering (Honours), a Bachelor of Design & Technology Innovation, a Diploma of Project Management, and Mining Supervisor certifications (G1, G8 & G9).

His expertise spans mechanical and site engineering, project coordination, estimating and procurement, shutdown planning, construction supervision, client liaison, and project and commercial management — with particular focus on coordinating a project’s transition from engineering and planning through to practical site execution.

A career highlight was his role as Project Engineer on the FMN Trunkline at Beverly Mine, involved from start to finish. More recently, Liam has taken on greater team leadership and client liaison responsibility through D&S’s SMP BAU works at Carrapateena.

Liam takes a practical, hands-on approach, with a strong focus on communication between engineering, trades and clients — turning what a client needs into a workable solution, and being someone the team can rely on to help solve problems as they arise.