About Us

Our Story

Facing new challenges can be daunting, but they also present an opportunity to rise above and push forward. At Sisima Group, we were forged by the difficulties of bringing the right people together to achieve success. Now, we want to bring that same expertise to you.

Our team is here to help you achieve the people-centered results you need.

We take pride in our ability to adapt and thrive, even in the most challenging business environments. With experience in navigating the complexities of developing markets, we’re equipped to support your success, no matter how seasoned your business is.

Our Mission

At Sisima Group, we empower businesses by driving innovation, fostering collaboration, and delivering excellence. Our mission is to enhance company cultures and results by optimising human capital and systems, leveraging cutting-edge cloud-based technology to enhance information access, streamline operations, and unlock the full potential of talent, enabling sustainable growth and superior performance.

Our Vision

To be the global leader in business advisory, known for transforming organisations through innovation, collaboration, and excellence, by optimising both human capital and technology to deliver exceptional, long-term results.

Meet the Leadership Team

Meet the team that keep the wheels turning on the machine.

PNG Country Managing Director

Achara Hinkley

Achara or Jeep as she is known by all, has spent more than 20 years working in PNG and has developed a network of skilled people who can help deliver the toughest of challenges. She has been an active participant in many local charities and has sat as Director on a number of companies over the years.

Her specialities are in Immigration, people development and training.

Group Managing Director

Matthew Hinkley

Matt is more at home as a hands on and technical problem solver. His background is primarily in the extractive industry in construction and asset management. He spent many years working the field of shutdown management in both mining and Oil&Gas industries in PNG. His specialist skills are Negotiations, communications, business strategy, financial controls and systems development.

General Manager Projects & Australia Director

David Lester

As a strong advocate for Partnering, collaborating and the pursuit for a better world, he is a goal driven solution developer who believes in an inclusive outcome.

"Change cannot happen in isolation, and I know that change can be scary. I work in partnership and to create a network of people and businesses that together bring infinite opportunities. A network that champions and embraces new ways of working."

PNG Finance Manager

Sheila Playah

Sheila Playah is an exceptional Finance Manager with extensive experience in the field. As a Certified Professional Accountant (CPA), she has a deep understanding of financial management and accounting principles she ensures our clients remain compliant. In addition to her professional achievements, Sheila is also a devoted mother. Her dedication to both her career and family is a testament to her strong work ethic and to excellence.

PNG Corporate Service Coordinator

Betty Madouna

Bettys’ achievements go far beyond her career and work efforts. She represented PNG in swimming competition in 1993 in the Arafura Games in Australia. In 1994, she was awarded for the Junior Female Athlete of the year in the SP Sports. She then went on to represent PNG in Arafura Games in 1995, 1997 and 1999. She also represented PNG in the 10th South Pacific Games in Tahiti. Betty specialises in HR compliance and employee relations.

Our Core Values

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Innovation

Continuously seeking new and effective solutions for our clients, leveraging cutting-edge strategies to stay ahead.

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Collaboration

Fostering a cooperative and inclusive environment where we work closely with clients to achieve the best possible outcomes.

Excellence