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Our Findings
After speaking to hundreds of marketers, data teams and leaders, we realised that many of you are not getting the most out of your Martech stacks. As more companies adopt a composable architecture that uses multiple best-of-breed platforms, now more than ever, it’s crucial to squeeze the most out of your investments.
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Within our various roles across Martech, we realised that providing this guidance is something we have been doing for years. We have been trusted to scope, validate and implement Martech architecture that aligns to business value.
Our Team
Gary Hanley
Co-Founder & Co-CEO
At heystack, Gary sets the strategic direction, manages operations, and maintains financial stability, while driving innovation and business development in the fast-paced Martech sector.
With over eight years of experience in Martech, Gary has worked at Gartner, Salesforce, and Iterable. At Gartner, he advised companies on selecting the right technology solutions to meet their goals. He then moved to Salesforce Marketing Cloud, expanding their presence in the Irish market. Later, as a Senior Account Executive at Iterable EMEA, Gary focused on the company's most significant and strategic customers.
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Fun fact: Gary is a keen golfer and once caddied for Ant from Ant and Dec.
Leon Grant
Co-Founder & Co-CEO
Leon is responsible for strategic direction and sustainable growth at Heystack.
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Leon has spent over 15 years working in the tech industry. After starting at Microsoft, he moved to the Salesforce ExactTarget Marketing Cloud. He has rounded his Martech experience at Iterable and latterly at Klaviyo where he built and lead the EMEA Mid-Market sales team through a successful IPO in 2023.
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Leon has had roles across Sales and Partnerships as an individual contributor and people leader.
Fun fact: Leon is an avid tea drinker and supports Aston Villa.
Seb Malbois
Co-Founder & CTO
Seb is the Chief Technology Officer ultimately responsible for all technology decisions within the agency.
Seb has over 15 years of Martech experience having worked at StrongView/StrongMail, Selligent, and Iterable. Previous experiences include Hewlett Packard and Bea Systems (now Oracle).
He was hired as Iterable’s first Technical Architect within EMEA. As a Principal Solutions Engineer his role expanded over Pre Sales, Post Sales and Partnerships working with hundreds of customers to validate their Martech stacks.
Fun fact: Seb plays pickleball, the fastest growing sport in the US!
Philip Johnson
Co-Founder & COO
Philip is responsible for operational functions of the business. He is also the Solutions lead, leading the company's sales engineering and support functions.
He has over 12 years experience working within the Martech Industry starting at Deloitte Digital selling and implementing Adobe and Salesforce. He was then hired as the first Solutions hire EMEA for Iterable where he was a Principal Solutions Consultant focused on the region's largest and most strategic customers.
Fun fact: Philip moonlights as a DJ and likes to eat and cycle his way through London.
Our Values
Diligence
Doing what we actually say we’re going to do. Whether that’s finding the answer to a question, following up on an action or reaching out to our network to be sure on something.
Documentation
Your teams are continually evolving so we always ensure our engagements are well documented. This means new joiners or other business units can easily be brought up to speed.
On the Edge
We’re obsessed with Martech updates. So much so we maintain and update our own Martech demo show room to ensure we have hands-on experience with the latest and greatest in Martech.