Hemsel was born from both experience and necessity. After decades in the industry, our founder, Alexander David Mandl, faced a life-changing health diagnosis — one that made a traditional career impossible.
Instead of stepping back, he chose to build something new, channeling 30 years of business development expertise into a company designed for impact — embracing adaptability, innovation, and the power of forging your own path.
The challenging story of our cosmopolitan founder.
What do you do if your doctors tell you there's less than two years left? If you're Alexander David Mandl, you adapt.
“I've spent my life navigating change—growing up across countries and working in diverse industries for over 30 years. Facing the ultimate challenge, I wasn't ready to give up.
Instead, I focused on what truly mattered: prioritizing my health to prepare for a 'last resort' double lung transplant and channeling my experience into building Hemsel, an agency providing accelerated growth services rooted in my 30+ years of Business Development expertise.“
1999 - 2002
Earned double graduate degree from UPenn:
Joined Goldman Sachs FICC (Fixed Incom Currencies & Commodities) to build up the European arm of GS Power - valuating and buying power plants for asset backed trading.
On September 11th 2001, I witnessed the collapse of the WTC Twin Towers, and ingested plenty of toxic dusts triggering a 23 year gradual lung degradation.
Growing a family while in continuous motion between Barcelona, Brussels, Luxembourg, London, Frankfurt, Milan, Paris and Madrid.
2022-2023
It's time for a career break, as I'm no longer able to contribute to the corporate world (mainly due to the incompatibility between global directive roles' travel needs and my degrading health situation).
Focus is on:
12-15th February 2025
April 2025
Hemsel's extraordinary professional team spent several months working tirelessly on readying our scale up, without missing a beat on any customer deliverable. What a feat given the circumstances!
We now open our doors to new accounts, ready to serve with the same dedication, attention to detail, and effectiveness that gained us so much traction with our initial group of clients.
Give us a try - your growth is our growth!
We are not your typical marketing agency
Our core expertise is hyper-targeted email outreach that outperforms industry standards. However, we also excel at related services—like strategy consulting, website creation, and content development—so you get exactly the support you need.
We believe in meaningful connections, not bulk blasts. Every campaign is carefully curated for authentic, one-on-one engagement that fosters lasting relationships rather than quick, hollow wins.
We use Lead IQ, powered by our fine-tuned LLM, to help us in our objectives. This ensures higher open rates, genuine engagement, and a steady flow of qualified leads.
Every metric—open rates, click-throughs, conversions—is shared with you in real time. We keep you fully informed so you can see exactly how our approach drives growth for your business.
Story behind our mascot
When we started Hemsel, we knew we weren't here to follow a rigid playbook. The Chameleon perfectly embodies what we are all about—adaptability, agility, and the power of understaning our environment.
Just like a chameleon doesn't just change color for camouflage but also to communicate and regulate itself, we believe true marketing success comes from understanding the landscape, adjusting strategically, and making an impact in a way that feels natural.
When we started Hemsel, we knew we weren't here to follow a rigid playbook. The Chameleon perfectly embodies what we are all about—adaptability, agility, and the power of understaning our environment.
Just like a chameleon doesn't just change color for camouflage but also to communicate and regulate itself, we believe true marketing success comes from understanding the landscape, adjusting strategically, and making an impact in a way that feels natural.
Ready to grow with us?
