Our Story. Your Future.

Founded in 2001, Accellis has grown to 40 fulltime employees primarily through word of mouth and referrals. With legendary service, the best tools and education, and 25+ industry awards including Best Tech Services Company, we have a proven formula for generating elite IT and IT support outcomes.

We understand at the end of the day you just want to know your investment in IT is making a difference. That’s why we’re here.

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Meet Your Accellis Leadership Team

The committed IT specialists that make up Accellis Technology Group collaborate as a team to provide our partners with great service. Our staff handles issues with a keen sense of empathy, ensuring that our customers’ end users can carry out the daily tasks necessary for success.

Joseph S. Marquette

Chief Executive Officer

As the founder of Accellis Technology Group, my journey has been driven by the goal of fostering a team culture that thrives on innovation and excellence. At Accellis, we’re not just a team but a community of A-players, constantly challenging ourselves to create new and better solutions for our clients and our industry.

Our success is rooted in a shared commitment to having a positive impact on the communities we serve, embracing challenges as opportunities for growth, and staying ahead of the technological curve. My educational background from the University of Illinois laid the foundation, but it’s the collective wisdom and drive of our team that propels Accellis forward.

Looking ahead, my vision for Accellis includes expanding our geographic footprint, diversifying our service offerings, and continuing to surround ourselves with individuals who are not only smart and passionate but also dedicated to our mission of excellence. We believe in continuous improvement – what we are today is a step ahead of where we were six months ago, and six months from now, we’ll be even stronger. Join us on this journey as we redefine the standard in professional IT services.

Brian Guscott

Chief Operating Officer

With nearly a quarter-century in the IT industry, Brian is responsible for the overall operations and service delivery at Accellis. A results-oriented leader, Brian brings an unmatched wealth of knowledge and experience to the team.

Prior to joining Accellis, Brian held leadership positions with national and regional IT consulting firms. He’s worked on hundreds of IT projects, including several larger platform and infrastructure projects and a multi-million dollar virtualization and datacenter migration project for a major law firm. Brian also has extensive experience in strategic planning.

A graduate of Bowling Green State University, Brian believes that IT should be seen as an asset, rather than an expense – that technology solves problems and makes organizations more efficient and effective. He is an active community member and enjoys spending time with his family in Lakewood.”

Abbey DeWitt

Chief Experience Officer

Abbey comes to Accellis with over three years in client relations. Before the IT field, she worked in transportation and education. Outside of work, Abbey keeps busy being a mom of 3. She enjoys yoga, boating, and as she puts it, ‘Mommin’.

Michael O’Neill

Director of Sales

As the Director of Sales & Marketing, Michael has handled new and existing business opportunities for Accellis since 2010. He is AZ-900 Certified in Microsoft Azure, MS-900 Certified in Microsoft 365, AI-900 Certified in Microsoft AI, and has significant expertise in public cloud and analytics.

Michael has an Associate Degree in Criminal Justice from Cuyahoga Community College and a Bachelor’s Degree in Political Science from the University of Akron where he graduated magna cum laude. He received the President’s Education Award for Outstanding Academic Achievement in 2002 and is Co-Founder of a real estate investment & construction management company.

Thomas Fazio

Director of Cybersecurity

Tom Fazio was CEO of his consulting business Big Mountain Technology located in Chagrin Falls, Ohio. In a ten-year span since its inception, he grew the business to more than a dozen clients, with monthly MSP contracts. He employed up to 4 full-time technicians.

From his beginnings in IT in 1996, Tom has progressed rapidly from designing and setting up his first Novell server on a BNC file-sharing network. In 1998 Tom joined Netnowledge Inc (later re-named Thinsolutions), as a senior technician, where he helped the company change direction from traditional consulting to an Application Service Provider (ASP).

In 2000, Tom joined Capstone Realty Advisors as Chief Technology Officer (CTO), where he remained for eight years, eventually providing – with the assistance of just one colleague – total IT support for 16 servers, six branch offices and a total of 85 employees.

In 2008 Capstone was closed down by its new owner PNC. Tom decided to use his experience and expertise, supported by his severance package, to set up and build his own consulting business. Big Mountain Technology was the eminently successful result before merging with Accellis.

Tom has an in-depth understanding of program and business process trends and issues, can identify the practical implications of new technologies, and can relate system capabilities to business and program goals.

When not working, Tom enjoys spending time with his family in Chagrin Falls and listening to his extensive collection of music.

Brandon Bergum


Brandon is a graduate of Kent State University and brings 20 years experience in IT. Brandon was President for Trustpoint Technologies. His role was to grow and maintain customer relationships and manage daily operations. Brandon’s previous experience include Solutions Architect, Director of Client Relations, Director of Client Services, and Engineer.

His hobbies include spending time at the Metroparks, sporting events, and collecting bobbleheads. Brandon is a family man and loves spending time with his wife and four boys.

“It is a real pleasure to work with Accellis and their highly skilled, professional, and friendly staff. They find cost effective technical solutions to our business needs. Their quick response shows their dedication and commitment to help us keep our business operations working smoothly. I highly recommend their technical services.”

Victor R. | IT Director

“Our project was a tremendous success. The taxpayers of the City of Milwaukee will never be aware of the savings and operational improvements that were achieved on their behalf, and that is exactly how it should be!”

Bob J. | City Official

When work & play collide it sparks brilliance and at Accellis we love to have fun when we step away from our computers!

“We’ve grown to appreciate Accellis not as a typical vendor or service provider, but truly a partner in our practice. I trust them completely. Bottom line for me is that our success can be directly linked to the work Accellis has done.”

Jay C. | Legal Professional

“I am writing this letter to thank you for your outstanding work on the Security & Risk Assessment. Your expertise and attention to detail were tremendously valuable. As a result of your work and recommendations, we passed our recent audit with flying colors. Again, I would like to express my sincere thanks for your contributions.”

Anastasia S. | Human Resources

Giving Back to the Community with Advanced Technology

Accellis has been working with the Cleveland Boys Hope Girls Hope all year to provide educational programs on technology, cybersecurity, and digital citizenship to teens. Our staff volunteers their time each week providing hands on education preparing them for entry in the workforce. Accellis also provides students access to the ClipTraining system, giving them a vast knowledge base of training in Microsoft Business Applications to help better prepare them for success in the future.

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