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Meet The Team

About Us Founders of Work On Your Business

Hi,

We are Hajo Sonntag and Mona Tenjo, co-founders of Work On Your Business.

It is our mission to support you in your business growth, help you fulfill your purpose and implement your ideas.

This is not about us, this is all about you and your results.

Find out more about how we can support you and what qualifies us as a great partner for your endeavours.

Meet The Founders

Mona Tenjo Profil Picture

Mona Tenjo

Mona gathered more than 15 years of experience in the areas of accounting, purchasing, business management, project management and even pre-sales. Her strong work-ethics allowed her to climb the career ladder and gain insights on various levels within companies of different sizes.

Mona’s strong track record led her to consult some of the largest organizations, such as Siemens, DP DHL, and HeidelbergCement, and lead the implementation of complex global projects.

Her degree in International Business was extended by countless client projects over the years, that equipped Mona with a profound knowledge of how to make the best out of any business, how to add value to any organization or endeavour, and how to create championship teams. She accomplished to train experts of more than 45 different nationalities in over 15 countries around the world, from half of Europe to Indonesia, Russia, Tanzania, USA and others.

Today she serves our Work On Your Business clients with practical best-practice insights, her ability of breaking complex matters down and by spreading our message to the world.

Hajo Sonntag Profil Picture

Hajo Sonntag

Hajo honed his skills in the technical world of engineering, research and development, and project management at automotive giants like Volkswagen, BMW, Faraday Future and even the Fraunhofer Research Institute.

His technical hands-on education and Master of Engineering degree trained his natural talent of troubleshooting the origins of problems and developing solutions to solve them once and for all.

Being responsible to manage large projects such as developing and launching an entire car and coordinating thousands of people across the globe to work together to achieve a common goal, sharpened his focus on the overall picture for project and company, as well as providing an immense knowledge-base of technical and business strategies and know-how to being able to solve any problem. Additionally, his martial arts career formed and strengthened his character, taught him discipline, leadership, and the value of strategic foresight.

Today, he finds himself as technical and business consultant, partner in media and jewelry businesses, and even mentor.

Hajo Sonntag Profil Picture

We Save Your Time

We don’t just talk about it – we get it done!

Hands-on, no fluff, results-focussed!

  • We speak your language.
  • We will find the best solution for your specific needs.
  • Of course, we go the extra mile for you.
  • Also, we will deal with vendors and tech support for you.
  • Finally, we make sure everything works smoothly together.

You are best at what you do – we cover everything else for you.

Values on About Us

Our Mission & Values

At Work On Your Business, it is our mission to help entrepreneurs work ON their business and not IN it. We help our clients to regain their freedom, keep their focus on the right topics and thrive in business.

Our core values are RESPECT, EXCELLENCE and RELIABILITY. We stand for: Do it once – Have it forever! And adjust when necessary. Because you don’t pay for the time invested, you pay for results! And that’s what we deliver: RESULTS!

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