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about do financial

Your trusted home loan team in QLD.

At DO Financial Services, we bring together more than 70 years of combined experience across mortgage broking, banking, settlements and property. We're here to make finance feel simpler for first home buyers, investors, upsizers, downsizers and growing families. From government schemes to low-doc and complex lending, we compare 40+ lenders and guide you clearly from first chat through to settlement day.

The DO Financial Services team

Genuine comparison

We compare options across more than 40 lenders, looking closely at rates, features and suitability. This gives you a genuine comparison and helps us recommend a solution shaped around your needs—not a one-size-fits-all loan.

Clear explanations

We guide you through every step in a way that suits how you prefer to communicate. With a comprehensive onboarding pack and ongoing support, you'll always know what's happening and who to ask.

Honest advice

We take the time to understand your full financial picture, desired outcome and future goals, so our advice supports what you need today while helping you move confidently towards what comes next.

No pressure

Our consultations are obligation-free, with no pressure and no strings attached. We focus on adding value, answering your questions and helping you choose the right loan when the time feels right.

Est. 2012
In business
Over a decade of local expertise
150+
Families Helped
In 2025 alone
40+
Lenders on Panel
We genuinely use them all
OUR TEAM

The people behind the mission

Sam Do

Sam Do

FOUNDER & DIRECTOR BROKER

Sam is a qualified Finance Broker with degrees in Economics and Commerce, but what matters most to him is helping people feel confident about their next step. With 20 years of experience, he helps clients compare options across 40+ lenders, whether they are buying their first home, growing an investment portfolio or reviewing an existing loan. Sam offers practical strategies, flexible home or office consultations, and support throughout the process. Away from work, Sam values his family, close friends and staying active through sport.

Juan Castano

Juan Castano

PRINCIPAL BROKER

With over 12 years of finance experience, Juan is known for clear communication, careful attention to detail and mortgage solutions shaped around each client's goals. He combines strong market knowledge, thoughtful advice and skilled negotiation to help clients feel informed, confident and supported from start to finish. Outside work, Juan enjoys family, friends, his puppies and discovering new restaurants together.

Mirela Kahric

Mirela Kahric

MORTGAGE BROKER

With over a decade across property management, sales and buyer's agency, Mirela understands the property journey from every angle. She became a mortgage broker to help people move forward with confidence, whether buying their first home, upgrading or investing. Known for clear communication, skilled negotiation and genuine care, Mirela takes pride in seeing client goals become keys they can hold.

Ana Spremo

Ana Spremo

MORTGAGE BROKER

Qualified as a Mortgage Broker in 2023, Ana brings more than 15 years of executive leadership and business management experience to every client relationship. She is known for making lending feel clear, calm and manageable, taking time to understand each person's priorities and long-term goals. With integrity, transparency and genuine care, Ana helps clients feel informed, confident and supported throughout.

behind the scenes

The team keeping your
application moving

Dolly Purva
Dolly
Purva
Billi
Leann
more than mortgages

Giving back to local communities

DO Financial Services believes strong communities are built through opportunity, connection and practical support. Through our four-year involvement with The Lady Musgrave Trust, we help create pathways to safe, stable housing for women and children. We also support local schools and sporting clubs, including Slacks Creek Tigers, Slacks Creek Rugby League, Runcorn State High, Runcorn Primary and Mansfield State High, helping more young people learn, grow and thrive locally.

over 10 years in the industry

100's of happy home owners