About Us

NSN Management

You deserve IT support that actually supports your business. Too many companies feel frustrated with slow response times, vague advice, and tech partners who don’t understand their business goals. At NSN Management, we believe technology should empower your business—not hold it back. Founded over 12 years ago, NSN Management has become a trusted partner to businesses across Tulsa and beyond by delivering fast, reliable, and business-focused IT support. We specialize in Managed IT Services, Cybersecurity, Compliance, and Strategic Technology Planning—everything you need to keep your business secure, running smoothly, and ready to grow.

We don’t just solve problems—we prevent them. Our team takes ownership of every issue from start to finish. You’ll never get bounced around or left wondering who’s responsible. We believe in being your single point of accountability for all things IT, so you can focus on what matters most—your business.

People make the difference—ours are the best in the business. Behind every fast response and every resolved issue is a team of highly skilled, deeply committed professionals who care about getting it right. Our staff isn’t just technically sharp—they’re trained to create a “WOW” experience in every client interaction. From frontline support to behind-the-scenes engineering, our people are the reason customers stay with us year after year. We hire for talent, train for excellence, and empower our team to go above and beyond—because great service isn’t a department, it’s our culture.

Led by a proven expert in the field. Our founder and CEO, Sean Fullerton, is a nationally recognized IT leader, entrepreneur, and published author with over 25 years of experience. He’s authored technical guides on Microsoft Active Directory and has led NSN Management to become an award-winning provider and the only 3CX Gold Partner in the Tulsa Metro area. Sean’s leadership philosophy is simple: IT should be a business enabler, not a distraction. His forward-thinking approach is baked into everything we do—from how we design networks to how we deliver support.

Today, NSN Management is trusted by companies in financial services, healthcare, and professional services who want more than just a help desk—they want a proactive, strategic IT partner.

Leadership

The right leadership makes all the difference. At NSN Management, we don’t just manage technology—we lead with vision, strategy, and a relentless commitment to helping our clients succeed.

Meet Sean Fullerton, CEO Sean Fullerton isn’t your typical IT guy. He’s a seasoned entrepreneur, published author, and trusted voice in the world of business-focused IT. With over 25 years of experience guiding companies through the ever-evolving tech landscape, Sean brings clarity, confidence, and strategy to every relationship we build.

He’s the author of Using Microsoft Active Directory and has been nationally recognized for his leadership in the managed services industry. In 2007, Sean was honored as one of Tulsa Business Journal’s 40 Under 40, highlighting his early contributions to business and technology in the region. Under his leadership, NSN Management has become one of the most trusted and awarded IT providers in the market—earning recognition as a Channel Futures NextGen MSP and becoming the only 3CX Gold Partner in the Tulsa Metro area.

But what truly sets Sean apart is his philosophy: IT should be simple, secure, and aligned with your business goals. Period. He leads NSN Management with a customer-first approach—focusing on real business outcomes, not buzzwords. Whether it’s helping a growing company navigate compliance requirements or designing an infrastructure that scales with their success, Sean’s leadership ensures you always have a partner who understands the big picture.

Why Choose NSN Management?

Compliance Specialists

We understand the critical importance of compliance and cybersecurity in healthcare and other regulated sectors, ensuring that your business remains secure and compliant.

Flat-Rate, Unlimited Support

With our all-inclusive support model, you get access to remote and onsite assistance whenever you need it, and without any surprise fees.

Veteran IT Experts Dedicated To Your Success

Our experienced team is committed to protecting your business and ensuring your technology supports your objectives, not hinders them.

Customized IT Strategies For Growth

Our tailored IT strategies are aligned with your business goals, allowing you to focus on leading your organization with confidence.

Fast, Reliable Response Times

Our highly responsive team provides solutions quickly and effectively, minimizing disruptions to your day-to-day operations.

Comprehensive Onboarding And Strategy

Our onboarding process includes a dedicated Client Success Manager and virtual CIO to provide seamless integration and ongoing strategic support aligned with your goals.

Empowering Your Business Through Technology

NSN Management isn't just an IT services provider—we're a dedicated partner committed to helping Oklahoma's small businesses and healthcare providers thrive. By providing proactive support and a customized IT roadmap, we make sure your technology serves as an asset to your business, not a distraction.

What Our Customers Have to Say

★★★★★

NSN has proven to be reliable and trustworthy IT MSP

For our team, they respond and resolve tickets in a timely manner. From an executive standpoint, NSN provides invaluable advice, insights and a forward thinking approach.

Jared Delacerda

Helped me grow as a person and as a business

I have known Sean professionally for over 2 years. He has been a great mentor and provides valuable insight as a peer to help me grow as a person and as a business. He is a stand-up guy and I highly recommend giving him a shot.

Brian Arredondo

They stay on top of our IT needs

NSN Management was our MSP for over 5 years until we moved offices. They stayed on top of our IT needs, managing updates, monitoring our network, protecting us from intrusions, deploying hardware upgrades, and providing guidance on how we could leverage technology to gain an advantage over our... NSN Management was our MSP for over 5 years until we moved offices. They stayed on top of our IT needs, managing updates, monitoring our network, protecting us from intrusions, deploying hardware upgrades, and providing guidance on how we could leverage technology to gain an advantage over our larger competitors. Sean knows his stuff and leads

Shawn Slavin

Their dedication to excellence has made a significant difference for our organization.

I have had the pleasure of working with NSN Management as our IT provider since 2018, and I couldn't be more satisfied with their services. From day one, their team has been incredibly responsive, knowledgeable, and professional. They take the time to understand our needs and ensure that our IT infrastructure runs smoothly. In this environment of ever-changing viruses and scammers, it is imperative to have a competent and forward-thinking IT partner. NSN has proved to be the best. Prior to hiring NSN, we were hit twice with the ransomware virus. We have had zero issues since partnering with them in 2018. They have the tools and personnel to proactively protect our business without breaking the bank. NSN is committed to providing us with the technology and tools we need while keeping budget in mind. They do not try to upsell to make a profit. When our server died, they knew our business and how we operate and suggested not replacing it and going to the Cloud. Besides the cost savings, it has made us more mobile and efficient. Whether we're growing or adapting to new challenges, NSN Management has been flexible and supportive, making sure our IT needs align with our business goals. Whenever we face technical issues, NSN Management is quick to respond, providing timely solutions that minimize downtime. Their expertise in IT management has been invaluable to our business. Additionally, their customer support is top-notch—they are always available to answer questions and offer guidance clearly and efficiently. I highly recommend NSN Management for anyone in need of reliable and highly skilled IT services. Their dedication to excellence has made a significant difference for our organization.

Tricia Booher

Love Working With Them

NSN has always been very friendly and helpful when we reach out to them. Love working with them.

Cristabel Del Campo

Always A Pleasant Experience

The NSN staff is always quick with their responses and extremely helpful! Always a pleasant experience with each and every team member!

Beverly Major

They Know What They Are Doing

The owner Sean at NSN Management saved me from making a big mistake when choosing software to run my business! They know what they are doing and the approach is straight forward and direct. Just what I need!

Bob Paradise

Top Notch

Sean and his team at NSN Management are top notch. They have helped us by logging into our system remotely to assist with adding equipment to our networks and/or troubleshooting. They also helped us install a sophisticated security camera to monitor our business remotely. Jim is great!