Our Team

Dan Mullen / President & CEO

Fresh out of college in 1989, Dan Mullen started his courtship with the technology industry while building PC’s for a local computer retailer.  In the early 90’s his exposure to the very new discipline of “computer networking” turned into his passion.  He was certified on all of the major vendor’s networks to include both Novell and Microsoft.  He steadily progressed through the ranks of his profession to arrive at the title of “Systems Engineer” for a large computer reseller serving Fortune 100 clients.  After 5 years, and careful consideration, he accepted a position as the principal of the Technology Advisory board for a large building materials manufacturer, Johns Manville.  The few years before building his company were spent maintaining computing platforms in a data center and managing Wide-Area links for the world’s largest B2B publishing company.  In his spare time he taught his craft as a “working professional” at a local technical college.

Dan’s experience as both a “reseller” and a “client” has helped him to gain the trust of clients in many different professions.  His company, Stonetree Network Solutions, offers a unique blend technology and business experience to its clients.

Andrea Mullen / Marketing & Social Media

Andréa’s common-sense approaches to management and company growth have proven to be an invaluable asset over time.  Her co-leadership of Stonetree has helped to grow Stonetree from its very humble beginnings to a projected $1M company in 2010.  Her careful consideration of the human element, marketing strategies and approachable market segments has helped Stonetree to obtain phenomenal growth over the last 7 years.  Her leadership has oftentimes provided the necessary fuel to forge ahead with our “no plan B” mentality, assisted in right-sizing our corporate goals as well as offering new and innovative services to our clients.  Her unique style of leadership and open-minded problem solving are necessary elements to our company’s operations at its core.

Dain Linder / Manager of Network Operations

After graduating college with a degree in Exercise Science and working as a Cardiovascular Technician at University Hospital; Dain began pursuing further education in the technology field as a result of his new found passion for technology as well as a need to provide a financial stability to his growing family.  It was during this time that Dain met Dan Mullen as one of his instructors at the ITT Institute. There was an immediate rapport between the two of them and Dain soaked up as much knowledge as he could. Upon completing the Network Administration course, Dain was hired by Saunders Construction as their LAN Support Specialist. Over the next 9 years Dain put into practice what he had learned and worked his way up to a Network Engineer all the while maintaining his friendship with Dan. Finally, the opportunity for Dain to work with Dan was realized in 2007.   Dain oversees the engineering team as the Manager of Network Operations for Stonetree and continues to support clients in the field.

Wendy Salazar / Business Finance

Wendy’s corporate experience spans almost a decade and a half.  She has been responsible for the “fiscal well-being” of many companies spanning many different professions.  Her vast experience includes such responsibilities as “Assistant Corporate Controller” and outsourced CPA services to many small to medium businesses ranging from Photography Studios to Computer “Cleanroom” companies.  A stint with a large Air Carrier allowed her the luxury of traveling abroad for a few years.  During this time she met her soulmate and moved to Denver to begin raising a family.  Wendy is responsible for all Accounts Payable, Accounts Receivable, Corporate taxes, Payroll and all manner of financial reporting to Stonetree’s ownership.

Patrick Sullivan / Messaging Systems Engineer

Patrick joined the Stonetree Network Engineering team in 2009. Patrick had been consulting in the Denver / Boulder area since 2006 and is one of the few IT professionals whose main bulk of experience is in small and medium sized business consulting. Patrick has certified in Cisco Networking and Security, Microsoft Exchange, and Microsoft Server Administration, which gives him unique qualifications to work on small and medium sized networks that include sensitive information, such as Physician’s offices. He is one of the few Microsoft Professionals in the Denver-Metro area with migration and implementation experience of Microsoft’s Exchange 2010, Microsoft’s premiere messaging platform. Patrick’s philosophy is “do the right thing for the client 100% of the time”. Before 2006 Patrick served four years in the Air Force where he earned an Associates Degree in Information Technology.