GARETH TENNANT
Former head of operational intelligence for the Royal Marines. Business coach on decision making in complex environments and expert in data management and security.
Gareth Tennant is a former Royal Marines Commando and head of operational intelligence, renowned for his expertise in leadership, decision-making under pressure and bridging strategy with execution in complex environments.
For Gareth’s full Bio see below: –
ARTICLES: –
TOPICS:
- Leadership in times of uncertainty
- Sensemaking – Decision making in volatile, uncertain, complex and ambiguous environments.
- Strategy vs Tactics – Linking a long-term vision to tangible day to day activity.
- Why data is not the new oil.
- Exploiting data technologies – To truly understand what is going on around us, we must understand the capabilities and limits of the sensors we rely on to construct our models.
- The ethics of surveillance – balancing the triumvirate of, privacy, security and convenience when it comes to our data.
- The future of information technology – emerging trends, capabilities and threats in our ability to truly understand the world around us.
- Influence – Lessons in behavioural change from military PsyOps
BIOGRAPHY
Gareth Tennant MSc – Ex-Royal Marines Intelligence Leader | Keynote Speaker on Adaptive Leadership & High-Stakes Decision Making
Gareth Tennant is the Former Head of ISR (Intelligence, Surveillance, Reconnaissance) for the Royal Marines and he is a battle-tested leadership expert who excels at working with leaders to unlock peak performance in uncertain conditions. With hard-won insights from combat operations and high-pressure deployments, Gareth coaches senior executives, governments, and security teams to master data-driven decisions, foster psychological safety, and align strategy with operations.
His dynamic keynotes—delivered at universities, think tanks, and conferences—draw visceral parallels between military espionage and business challenges, empowering leaders to embrace “mission command,” cut through information overload, and cultivate trust for breakthrough results. Gareth shines at partnering with C-suite leaders, using curiosity, empathy, and practical frameworks to build resilient teams that excel amid chaos.
As Principal Consultant at MAIAR Ltd and founder of Decision Advantage Consulting, Gareth has transformed how organizations from Fortune 500 firms to startups harness intelligence for competitive edge. Book Gareth Tennant for your next leadership summit—expertise in adaptive leadership, decision making in complexity, and team coherence guaranteed to inspire action.
Ready to book Gareth for your event? Enquire about fees and availability info@orationspeakers.com