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SentryOne Cyber was born in the year 2017 to provide innovative, quality and cyber security-driven solutions to the clients, as well as supporting key partners and strengthening relationships within the industry.
Led by IT and cyber security trailblazer Jai Aenugu, the founder and CEO of SentryOne, we strive to retain our competitive edge and we create solid, long lasting cyber security journeys with everyone we work with.
We are your trusted partner in cyber security
The SentryONE team fully appreciates and embraces the value of providing the best cyber security support and services when it comes to protecting your business, employees and assets.
Marlon and the team lead with a modern and realistic approach, to the needs and wants of businesses and with a strong network of industry partners means SentryONE lead the way in talking the talk and walking the walk when it comes to cyber security.
We cover all sectors on and are expanding into new geographical territories. People are starting to identify SentryONE and its leader Marlon with trusted support and services that will ensure safety and cyber wellbeing.
SentryONE wants to create lasting relationships with our clients and ensure they are protected for the worst case scenario when it comes to cyber security threats. We are here to help guide you with our expert advice and resources to provide you with market leading products, to keep your business safe.
Jhon is a skilled Cybersecurity Engineer with expertise in hardware, software, networking, and security technologies. He is pursuing a Master's in Cyber Security at Robert Gordon University and has a background in System Administration. Previously, he worked as a Technical Lead for a Microsoft Partner, handling security, compliance, and project management.
David recently completed his BSc (Hons) in Ethical Hacking from Abertay University this summer and brings valuable experience from his internships at Gordon & MacPhail. Aaron works alongside our Cyber Security Consultants on projects based on our Cyber Essentials services.
Josh is a dedicated IT professional with CompTIA A+ and Network+ certifications, demonstrating his commitment to the field. In addition to his IT expertise, he has strong administrative and financial skills, further enhancing his ability to manage both technical and operational projects.
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I’ve spent years helping CIOs, CISOs, and technology leaders navigate the messy reality of modern IT through my work at Sentry IT. Over time, I saw a consistent gap—too many organizations had complex cybersecurity needs but not enough time, budget, or internal talent to handle them.
State and local governments, schools, and SMBs kept telling me the same thing: We know cybersecurity matters, but we’re overwhelmed.
That’s why I created SentryONE.
SentryONE is built on the belief that even the busiest organizations deserve straightforward, effective cybersecurity guidance and support. Our mission is simple: keep you secure so you can focus on serving your community, educating the next generation, or growing your business.
We bring the same hustle and accountability that built Sentry IT to every relationship. At SentryONE, we’re the cybersecurity partner that actually picks up the phone, speaks your language, and helps you get it done—without the jargon or the spin.
If you need a team that’s big enough to deliver but small enough to care, you’re in the right place.
At SentryONE, we’re more than a cybersecurity and IT services provider. We’re a part of the communities we serve. We live here, work here, and raise our families here. That’s why we take our commitment to the community seriously—because we know that technology is more than just a tool; it’s a lifeline for our schools, hospitals, businesses, and local governments.
We believe in showing up for the people behind the technology. That means supporting local education, creating opportunities for young people to pursue tech careers, and being there when things go wrong—day or night. We’re proud to volunteer our time and expertise to help schools with digital literacy, mentor the next generation of IT leaders, and partner with local nonprofits that keep our neighborhoods strong.
We’re not just here to do business—we’re here to make a difference. And that’s a promise we stand by.
Your Cybersecurity Ally and Tech Strategist
Marlon Grigsby is the driving force behind SentryONE. With over 20 years of experience in IT consulting, cybersecurity, and executive advisory, Marlon knows how to cut through the noise and deliver real results.
As CEO of Sentry IT, he’s spent years helping Fortune 500s, mid-market leaders, and fast-growing startups navigate the toughest technology and security challenges. His track record spans everything from cloud migrations to building cybersecurity frameworks that actually work in the real world.
Marlon started Sentry IT to be the kind of partner he wished he’d had as a CIO and CISO—someone who doesn’t just talk tech but rolls up their sleeves and gets things done. That same hands-on approach drives SentryONE.
A proud Ohio native now based in Atlanta, Marlon is known for his straight talk, deep expertise, and unwavering commitment to helping organizations thrive in a digital-first world.
When you work with SentryONE, you’re not just hiring another vendor. You’re gaining a trusted advisor who’s been in your shoes—and knows what it takes to keep your data, systems, and people safe.
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