Melissa Cowdry – VP Global Marketing
I worked with John at Quantanite, where he reported to me and we collaborated closely across various strategic initiatives. John consistently approached complex challenges with a solutions-oriented mindset to deliver growth. His ability to build meaningful relationships, both internally and with external stakeholders, was particularly impressive, demonstrating both leadership acumen and strategic thinking.
What sets John apart is his collaborative approach and ability to remain calm under pressure while maintaining exceptional professionalism. He creates an environment where team members feel genuinely supported to perform at their best, combining marketing expertise with a results-driven focus that makes him invaluable in high-growth environments. I would not hesitate to work with John again and highly recommend him.
History
- Company: Quantanite
- Connection: Melissa was the VP Global Marketing and worked closely with John during his time as Head of Performance Marketing.

Heather McKenzie – Co-Founder Velocity Labs
I’ve worked with John at two agencies now, and more recently he managed me and the rest of the client services team. He was always super supportive, one of the first people I’d go to if I got stuck. He just handled the trickiest client conversations so calmly and always found a way through. Just a brilliant person to work with, and an all-round great guy.
History
- Agency: SUSO (SEO Agency)
- Connection: Heather was a Senior Project Manager and worked closely with John during his time as Client Services Team Leader.

Albadr Alhashemi – Head Of SEO
John parachuted into SUSO as an Account Director at the beginning of COVID, just as global panic and uncertainty were setting in. From his very first week, John wasted no time in establishing client relationships and navigating extremely challenging circumstances, as clients were panicking and considering cancelling due to the pandemic. His ability to rapidly build rapport and seek win-win outcomes during such an unprecedented time was nothing short of life saving.
From an internal team perspective, John’s excellent rapport building continued. He quickly earned the confidence of team members through his professionalism and his ability to manage the unique challenges of COVID. His calm and cheerful disposition gave everyone greater confidence when communicating with clients, making even the most difficult conversations considerably easier.
I conclude by saying John was nothing short of a pleasure to work with. He is a rock around which a team can be built around.
History
- Agency: SUSO (SEO Agency)
- Connection: Albadr was the SEO Team Leader and worked closely with John during his time as Client Services Team Leader.
More Testimonials
Alexander Brown
Snr Data Engineer
Snr Data Engineer
John’s management played a key role in my development early in my career. He not only helped me adjust to the fast paced environment I joined as a graduate but also gave me space and encouragement to learn new things beyond the roles I was hired to do. Without this help I would not be where I am today and I owe a lot of thanks to Johns management for the way my career has progressed.
History
- 4Ps Marketing: Part of Artefact
- Alex was an Executive in the Finance and Motoring Team and reported to John during his tenure as Senior Account Manager.
Daniel Luck
SEO Executive
SEO Executive
When we worked together previously at SUSO and 4PS Marketing, John was an excellent manager and a significant mentor to me when I was still inexperienced in the industry and as I developed over the years. John was highly encouraging of me to achieve my best and was great at laying out periodic goals for me to measure my progression, thanks to which I was eventually promoted.
History
- 4Ps Marketing: Part of Artefact
- Dan was an Executive in the Finance and Motoring Team and reported to John during his role as Senior Account Manager.
Haroon Shirinsha
Organic Specialist
Organic Specialist
Working with John O'Shea at We Are Roast was a genuinely rewarding experience. As my account director, he consistently created a supportive and collaborative environment that allowed me to thrive in my role as an SEO Specialist. His ability to clearly communicate client goals—especially with high-profile accounts like Audible—ensured that we always had a clear strategic direction.
History
- We Are Roast
- Haroon was an SEO Executive and reported to John during his time as Account Director..