Expert AI product development and consulting

Mark MacMahon

CEO

Mark is a software architect and AI product builder. As CEO of ContextRocket, he leads product architecture and engineering, working hands-on with multi-agent systems and LLMs. He has built software and led engineering teams since 1997 across startups, venture studios, and enterprises in Europe and the US. Most recently, he was CTO of Luzia, an AI chatbot startup serving over 80 million users. Previously, he served as Venture CTO at BCG Digital Ventures, founding CTO at heycar, and CTO of FLOYT Mobility (operating billiger-mietwagen.de, Germany's largest car rental marketplace). Earlier in his career, he worked on early agent systems at Emuse, search and location platforms at Nokia HERE, and biometric identity systems at Daon. He writes publicly at markmacmahon.com on AI, agents, and systems architecture.

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• Essays and writing

Marcus Sherwin

CRO

Marcus leads commercial strategy, go-to-market, and enterprise sales at ContextRocket. He brings over a decade of commercial experience scaling revenue across high-growth startups and global enterprise organisations. He spent six years at LinkedIn as Lead Enterprise Account Director for Tech EMEA, managing large media programmes across tech and financial services accounts. Alongside ContextRocket, Marcus is Managing Partner at Kleos and hosts Not Just Ads, a B2B marketing podcast with over 100 episodes examining how businesses build trust and visibility. He also teaches GTM Sales and Marketing Strategy at IE Business School.

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• Kleos
• Not Just Ads

Rahul Gazula

Chief of Staff

Rahul leads strategy and operations at ContextRocket, ensuring commercial commitments translate directly into delivered product. He brings seven years of experience across experiential marketing, media, consulting, and venture building, having worked on the agency side, client side, and inside high-growth ventures. At EY, he delivered enterprise transformation programmes from strategy through to execution; at WPP Media, he managed media planning for Google and Airbnb; and at Fever, he built an inbound sales operation from scratch for a new joint venture. As Chief of Staff, he connects commercial goals with technical execution to ensure customer adoption lasts.

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