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Our Leaders

Executive Team

Portrait of Tom Reidy

Tom Reidy View LinkedIn Profile

Tom is Avalon's Founder and CEO. He has over 27 years of experience in Computing Services, Software Development and Enterprise Consulting and is a company Principal responsible for establishing company strategy, oversight for technology selection, and management of services operations. Reidy's career roles have spanned hands-on programming, design and architecture, project management, operations management, business management, and executive leadership & planning. Before starting Avalon, Reidy was Partner and Vice President of Emerging Solutions and Technologies for Plano (TX)-based eVerge Group and also previously worked in technology implementation and management capacities as a Partner at CSC and EDS. Reidy holds a Bachelor of Science degree in Aerospace Engineering cum laude from the University of Notre Dame and a Master of Science degree in Electrical Engineering cum laude from the University of Southern California. He also sits on the Board of Directors of ManeGait Therapeutic Horsemanship.

Portrait of Casey Green

Casey Green View LinkedIn Profile

Casey is Avalon's Executive Vice President of Corporate Strategy and a company Principal. He has over 25 years of software industry experience and is responsible for overall management of Avalon's partner selection and relationships, marketing, sales and business development. Under Green's leadership, Avalon was named Partner of the Year in the America's for Vignette on three consecutive occasions and Partner of the Year in Avalon's first year as a MarkLogic partner. Before joining Avalon, Green was a key member of Microsoft's Visual Basic for Applications (VBA) licensing operations at Summit Software, serving as a Territory Sales Executive and ultimately directing all VBA sales activities for the N. American region. Prior to that, Green served as Product Manager at Antares Alliance Group and was responsible for the 1997 rollout of the EdgeworX web application development product which was awarded Best of Comdex. While at Electronic Data Systems from 1988 through 1994, Green held advanced engineer and architect roles in the delivery of enterprise-scale mainframe and client/server implementations. Green graduated with honors in 1988 from the University of Illinois earning a BS in Computer Science Engineering and a minor in Speech Communications. He also sits on the Board of Advisors for the Department of Computer Science & Software Engineering at Rose-Hulman Institute of Technology.


Portrait of Brenda Alexander

Brenda Alexander View LinkedIn Profile

Brenda is Avalon's Director of Finance and Administration.  A Certified Public Accountant, Ms. Alexander has over 20 years of experience in the financial and accounting industry and is responsible for planning, directing and coordinating critical accounting functions.  Her experience is vital in the continuous evaluation of the effectiveness of Avalon's financial and information systems, management and operational procedures, and internal controls.  Prior to Avalon, Ms. Alexander served in Controller and Accounting Management positions in private industry following extensive accounting and tax roles with Coopers & Lybrand. She holds a Bachelor of Business Administration in Accounting summa cum laude and earned numerous accounting excellence awards from Angelo State University.

Geographic Practices

Dallas/National Office

Portrait of Mike Green

Mike Green View LinkedIn Profile

Mike is a Managing Director for Avalon's Dallas/National Consulting Practice. Green has over 20 years of experience in the IT industry and is responsible for managing the daily operations and growth of Avalon's nationwide team of consultants focused on Search, Content Management and Big Data solutions. Green has experience defining and implementing IT transformation strategies for public and private enterprises in industries including Health Care, Transportation, Manufacturing and Financial Services. He applies his expertise in project leadership and business analysis to ensure that technical projects satisfy business needs. Prior to Avalon, Green was a Principal Consultant with EDS and managed development teams at multiple IT start-ups. Green holds a Bachelor of Science in Computer and Information Systems from The Ohio State University and an MBA from the University of North Texas.

Portrait of John Holshey

John Holshey View LinkedIn Profile

John is a Managing Director for Avalon's Dallas/National Consulting Practice, responsible for and working from the Boulder, CO office. Holshey has over 30 years of experience in the IT industry and is responsible for managing the daily operations and growth of Avalon's nationwide team of consultants focused on Content Publishing, Enterprise Search, Web Presence, and Big Data solutions. Holshey is responsible for the strategic direction and management of the practice. He has experience in project leadership, strategic planning, and creating innovative solutions for ultimate client success. Prior to Avalon, Holshey was a Business Area Manager with ENSCO, Inc. and several other defense contractors. Holshey holds a Bachelor of Science in Computer Science from Frostburg State University and an MBA from the University of Florida.

DC Office

Minneapolis Office

Portrait of Stu Nelson

Stu Nelson View LinkedIn Profile

Stu is the Managing Director of Avalon's Minneapolis Consulting Practice.   He has over 30 years of experience in business, management consulting and information technology.  Prior to joining Avalon, Stu served as the Leader of Computer Sciences Corporation's (CSC's) Public Sector Consulting Practice, responsible for the State & Local government market in North America.  He also served as Senior Partner and Managing Director of CSC's Minnesota Business Unit in Minneapolis with responsibility for all clients in Minnesota, Wisconsin, Iowa, Nebraska, the Dakotas, Upper Michigan, and portions of Central and Western Canada.  During his career he has served clients in financial services, insurance, consumer products, transportation, manufacturing, utilities, technology, and the public sector.  Prior to CSC, Stu spent 10 years with KPMG Peat Marwick's Consulting Practice in Sacramento, CA and also served 10 years in the United States Air Force.  Stu holds a Bachelor of Science degree in Management Information Science and Accounting from California State University, Sacramento.

St. Louis Office

Portrait of Sean Hall

Sean Hall View LinkedIn Profile

Sean is Practice Director for the St Louis office in Avalon's Midwest Consulting Practice.  Hall has over 20 years of experience in the IT industry and is responsible for managing the daily operations and growth of Avalon's St Louis presence.  Hall joined Avalon in 2006, beginning as both a Developer and Lead Architect in the company's Content Management practice and subsequently advancing into both Project and Account Management. He has led several major Avalon initiatives in the Financial Services, Health Care, Manufacturing, and Pharmaceutical sectors. Prior to Avalon, Hall was a Senior Developer and Systems Analyst with Verizon and both a Developer and large team Resource Manager with Afni, inc.  He holds a Bachelor of Arts in History from Illinois State University. 

Technology Leadership

Portrait of Chad Chatfield

Chad Chatfield View LinkedIn Profile

Chad is VP of Solutions Engineering for Avalon. He has over 15 years of experience in Software Development and IT and is responsible for consulting on open source and alternative technologies for Fortune 1000 companies and startups.  During his tenure, Chad has been responsible for full lifecycle development and delivery of large-scale projects across Microsoft and open source technologies. His career spans the financial, regulatory, wagering, government and media industries.  Prior to joining Avalon, Chad was Vice President of Technology at He previously served as Vice President of Software Engineering at Springbok Services, Inc and as Director of Engineering at TVG (Wagering).

Portrait of Sean Dowd

Sean Dowd View LinkedIn Profile

Sean is Avalon's VP & Chief Architect and is responsible for architectural oversight for our large scale application development projects. Dowd has more than 25 years of experience in apps development and management with a strong background in DevOps and Cloud Automation. His focus at Avalon is with open source, automation and enterprise architecture. Sean brings strong experience to our team in the industries of transportation, telecommunications, logistics, healthcare and security. Prior to joining Avalon, Sean served as a Distinguished Techologist and Chieft Architect at HP, a Distinguished SE and Consultant Architect for EDS, and Principal Engineer at Allied Riser Communications. Dowd holds a Bachelor of Science with Honors in Computer Science from University at Buffalo, part of the State University of New York system.

Portrait of Tony Jewitt

Tony Jewitt View LinkedIn Profile

Tony Jewitt is Avalon's Vice President of Big Data Solutions. He has more than 20 years of experience in marketing, sales and business development within the information technology industry. Prior to joining Avalon, Jewitt was CEO of The Hive Group, a leading data visualization software company, where he led the firm from its start-up phase with three pilot projects to profitability with over 100 major customers. Prior to Hive Group, Jewitt was Senior Vice President of Marketing at InStranet (acquired by where he oversaw all areas of product strategy, corporate and product positioning, and managed all corporate-level marketing functions including InStranet's customer advisory board. Prior to InStranet, Jewitt was Group Vice President of Extranet Business Development at Business Objects where he led the company's pioneering work in extranets and e-business. During his tenure with Business Objects, Jewitt grew the extranet division from start-up to over $40m in annual revenues in three years. Before joining Business Objects, he served as Director of Business Development for Oracle Corporation's Education Division and worked as a consultant and systems engineer at EDS. Jewitt holds a Bachelor of Science in Electrical and Computer Engineering from the University of Texas at Austin.