Who we are

At MG CPA & Advisory, our team of seasoned accounting and auditing professionals is dedicated to delivering precise financial solutions tailored to your business needs. With a steadfast commitment to excellence, we provide insights that help drive informed decision-making and strategic growth.

Colorado Public Accounting Firm License #5000824

I bring a career that spans public accounting, executive leadership, and private equity environments—leading financial strategy, M&A integration, and building high-performing, scalable finance functions and teams. My experience includes work across construction, SaaS, healthcare, manufacturing, and hospitality, giving me a broad perspective and a diverse playbook for solving complex challenges. I’ve paired a strong technical foundation in public accounting with hands-on operational finance experience, partnering with leadership to improve profitability, streamline processes, and position companies for strategic growth.

With a background that blends technical precision and practical leadership, I navigate both regulatory demands and the operational realities of running a business. Whether guiding assurance engagements, preparing for transactions, or delivering strategic advisory, I focus on providing actionable insight that helps clients make confident, well-informed decisions.

I see financials as more than numbers—they’re a roadmap to opportunity, and my job is to help ensure yours leads to growth and lasting value.

When I’m not problem solving with my clients, I’m likely golfing with my husband or hiking with my two Boston Terriers, Monster and Taco. As a Colorado Native, I love supporting our local small businesses - you can find me at one of our excellent restaurants or shopping our boutiques!

Sarah Montgomery - Partner

As a Partner at MG CPA and Advisory PLLC, I draw on more than a decade of assurance expertise gained at a Top 10 public accounting firm and hands-on leadership experience as Controller for two construction companies, both of which were successfully sold to private equity groups.

This unique combination of public accounting and industry experience allows me to bring clients a practical, results-driven perspective—balancing the rigor of technical standards with the realities of running and growing a business. I provide trusted assurance and consulting services across a variety of industries, helping business owners, executives, and stakeholders navigate complex financial reporting, improve operational performance, and prepare for strategic transactions.

I’m committed to building long-term relationships grounded in integrity, transparency, and value, ensuring clients receive not just compliance, but insight that drives better decisions.

When I’m not serving clients, I enjoy making the most of life in Colorado. As a Colorado native, I love spending time outdoors—whether it’s hiking with my Golden Retriever, River, skiing with my wife, or golfing. I also enjoy experiencing live music and cheering on our local sports teams.

Chad Gallion - Partner

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