Built From Nearly
Three Decades on the Front Lines
Office Guard was founded by Mike Killian, an enterprise technology and cybersecurity veteran who spent decades building the protection large companies give their people, and saw that real estate agents, working from a phone with their name on every email, never had it. So he built it for them.
Built From the Front Lines
Mike Killian entered technology consulting in 1996 with a deliberate focus on enterprise business — advising large organizations on infrastructure strategy and operational resilience. Over the following decade, he deepened that practice into complex enterprise engagements across critical industries, developing a firsthand understanding of how technology risk translates into business risk.
By 2010, Mike had pivoted to a security-centric focus, helping enterprise clients identify exposure, harden systems, and build defensible architectures with an emphasis on measurable risk reduction. It was during this period that he recognized a pattern: the tools and disciplines available to large enterprises simply did not reach the small offices that needed them most, and real estate least of all.
In 2016, Mike helped launch the first commercial cyber range in the United States — a live-fire training environment purpose-built to develop security operations teams. That work sharpened his conviction that awareness and readiness, not just technology, are the foundation of effective defense.
In 2021, he became a go-to-market leader for a security awareness platform, driving adoption of cloud-based cybersecurity training across enterprise and mid-market clients. The experience confirmed what he had long observed: the gap in email protection for real estate agents and brokers was not a technology problem. It was a market problem. No one was solving it for them.
In 2025, Mike founded Office Guard to close that gap, bringing the protection a large company gives its people to real estate agents, brokers, and everyone in the deal.
Entered technology consulting with a deliberate focus on enterprise business — advising large organizations on infrastructure strategy, systems integration, and operational resilience.
Deepened enterprise technology practice, leading complex engagements across critical infrastructure and large-scale business transformation initiatives.
Pivoted to a security-centric practice with an emphasis on risk reduction — helping enterprise clients identify exposure, harden systems, and build defensible architectures.
Helped launch the first commercial cyber range in the United States, purpose-built to train security operations teams through live-fire simulation and adversarial exercises.
Became a go-to-market leader for a security awareness platform, driving adoption of cloud-based cybersecurity training and awareness programs across enterprise and mid-market clients.
Founded Office Guard to close the gap in email protection for real estate agents, brokers, and everyone in the deal. Protection that fits an agent's phone.
Our Values
Built for Real Estate
We do not try to be everything to everyone. We protect real estate agents, brokers, and everyone in the deal. Everything we build has to work for someone on a phone between showings.
Transparent by Default
No black boxes. Every warning we raise is in your portal in plain English: what we found, who it came from, and what to do.
Protection Without Disruption
Security that gets in the way of client service is security that gets turned off. We are a silent partner. Nothing changes about how you work, and we speak up only when something matters.
People-First Security
Technology alone cannot stop email attacks — people can. Every warning tells the agent what to do next in plain words, because the person reading the message is the last line of defense.
The Team Behind Your Protection
Mike Killian
Founder & CEO
Mike brings nearly three decades of enterprise technology and cybersecurity leadership to Office Guard. His career spans large-scale enterprise consulting, security operations training — including helping launch the first commercial cyber range in the United States — and go-to-market leadership for a leading security awareness platform. Recognizing that real estate agents and brokers, and the offices that close their deals, were chronically underserved by enterprise security vendors, Mike founded Office Guard in 2025 to close that gap. He has since built the team that develops Office Guard and answers its support line.
Certified and Compliant
Our infrastructure and operations meet the standards your regulators and insurers require.
Ready to Work With Us?
Start with a free assessment and meet the people who will be keeping watch over your office.