Bluum Leaders

John Horton

Chief Executive Officer

John Horton is a strategic and growth-focused leader with over 20 years of experience, driving business expansion through organic growth, mergers, and acquisitions while building strong company cultures focused on partnerships and delivering outcomes. Known for his transformational leadership, John effectively guides organizations through change and positions them for long-term success. His extensive experience in multiple industries and his commitment to excellence make him a well-rounded executive.

At Bluum, John will focus on building a strong foundation guided by his philosophy of three pillars of success: creating the best employee experience, building high-performing teams, and providing best-in-class customer experiences. His leadership will center on collaboration, trust, and aligning the organization to further support our mission and vision.

Executive Leadership Team

Rob Gag

Chief Commercial Officer

Rob Gag

Chief Commercial Officer

Rob Gag brings decades of experience in K-12 education solutions and a passion for driving meaningful change in learning environments. Having previously led Bluum’s go-to-market strategy and served as CEO of Tierney, Rob has a deep understanding of the challenges and opportunities within education.

Rob’s leadership is instrumental in guiding Bluum’s growth, ensuring schools and institutions have access to the technology and support they need to create impactful learning experiences. His dedication to education, both in and out of the classroom, aligns seamlessly with Bluum’s mission to create a future where every student has the opportunity and resources to succeed.

Rob’s return to Bluum marks an exciting chapter in the company’s journey—one focused on sustainable growth, innovation, and a shared commitment to transforming education.

Kerry Shaw

Chief Human Resources Officer

Kerry Shaw

Chief Human Resources Officer

Kerry is responsible for Bluum’s human resources strategy and its execution. Her background includes more than 20-plus years of experience in human resources from varied industries, which includes developing and executing a comprehensive talent strategy to meet the needs of the business.

Kerry’s focus is on partnering with the business to develop people-oriented strategies to drive the organization forward. An enthusiastic champion who genuinely engages with employees, Kerry focuses on attracting the best and brightest talent, developing and retaining employees and leaders and supporting an inclusive and equitable culture.

As a mother of school-aged children, Kerry was inspired to join Bluum and its mission to make learning more accessible to all students.

Mark Stachulski

Executive Vice President

Mark Stachulski

Executive Vice President

Mark, better known as Stosh around the office, has spent 35 years in experience in the technology space, with 12 years directly focused on EdTech. Stosh acts as Executive Vice President and is also a member of the Bluum Board of Directors, having served on the Board since 2011.

Throughout the past 25 years, he has served in various C-Level positions in technology and financial services businesses, most notably with a Fortune 500 company, a large Chicago-based family office, and a major public accounting firm. Stosh joined as an Executive Consultant in 2010 and currently performs advisory services to the CEO and C-Suite of Bluum.

He oversees all of the company's legal services, manages the companywide facility and lease agreements, develops and manages the leasing services to Bluum’s customer base and performs special projects.The company's objective drives Stosh to serve education institutions that improve and enhance learning outcomes by providing a full suite of technology services and equipment for the benefit of students.