The People Behind Lumina Ventures
We're Sandi Xian and Marcus Hahnheuser — a Brisbane-based couple who've spent our careers building operational systems inside some of Australia's best-known organisations. Now we're bringing that expertise to South East Queensland's essential services sector.
Sandi Xian
Canva | KPMG
Sandi built her career at the intersection of operations and technology. At KPMG, she designed and implemented operational processes for enterprise clients across multiple industries. At Canva, she helped scale operations during one of Australia's most remarkable growth stories — learning firsthand what it takes to build systems that work at scale without breaking.
She brings a rare combination: big-four rigour and the pragmatic, move-fast execution of a tech company that grew from startup to global platform. When she looks at a trades business, she sees the same opportunities she's spent years capitalising on — processes that can be streamlined, decisions that can be data-driven, and teams that can be empowered with better tools.
Marcus Hahnheuser
RACQ | Virgin Australia | Suncorp
Marcus spent his career in technology and operations leadership across some of Australia's largest service organisations. At RACQ, he led technology initiatives serving millions of members. At Virgin Australia, he worked on operational systems for one of the country's major airlines. At Suncorp, he drove technology transformation across insurance and banking operations.
What these roles have in common: large-scale service delivery, complex scheduling and logistics, regulatory compliance, and the constant challenge of doing more with less. These are exactly the challenges that essential services businesses face every day — and Marcus has spent decades solving them.
Why We're Doing This
We've spent our careers making other organisations more efficient. Now we want to do it for ourselves — and for business owners who are ready to hand over the keys to someone who'll look after and grow what they've built.
South East Queensland's essential services sector is full of outstanding businesses built by dedicated owner-operators who are approaching retirement. Many of these businesses could be worth significantly more with the right operational improvements and AI implementation. We want to be the buyers who see that potential and have the proven skills to realise it.
We're not interested in buying businesses to flip them or strip them down. We're looking for the businesses we can operate personally, invest in for the long term, and grow using the enterprise expertise we've accumulated across our careers.
Want to know if your business is what we're looking for?
Check our acquisition criteria or start a confidential conversation.