The Assertion Mastery

For current & aspiring women leaders in STEM

6 week online course with proven tools and live support
to gain natural confidence and assertiveness at work

Stop hoping someone will advocate for you, while watching less qualified colleagues get heard, valued, and promoted ahead of you.

You’ll get Harvard research-backed strategies to build your power at work, techniques to feel genuinely confident instead of second-guessing yourself, and step-by-step guides for speaking up, showing your value, and handling tough situations. Everything is practical and ready to use straight away.

Feel too nervous to speak up - or when you do, get ignored?

Ever feel like you're basically on mute in meetings?

Tired of having to 'act different' in a room full of men?

Ever notice you're called aggressive for saying what they just said?

Know you're brilliant at your job but keep getting overlooked?

Fed up watching less qualified colleagues get promoted ahead of you?

Here is what our Alumni Assertion Masters are saying...

Hannah Pearson

Software Engineering Team Lead, Calero

Being a woman in tech, I often struggled with imposter syndrome so I decided to complete a course to improve my self-belief and assertiveness.

Christina has produced a wonderful course which has provided me with invaluable skills and a noticeable mindset shift that my manager commented on after just a couple of sessions.

Xiaole Chen

Systems Engineer, Palo Alto Networks

I wanted to become more assertive for a long time. That is not easy as a woman in tech! I often experienced situations where male colleagues repeated exactly what I said and took the credit. Or where I was underestimated and overlooked for promotions.

The Assertion Mastery course helped me gain the mindset and tools to share my ideas with confidence without overthinking, whilst taking charge of my career the way I want.

The struggles every woman in STEM knows (but rarely talks about):

Having to constantly prove yourself, while guys get instant respect
People stealing your ideas - then watching them get all the credit
Being called "too quiet" because you're not talking over everyone
Avoiding conflict because you hate being labeled "difficult"
Feeling like a fraud even though you're super qualified
Those annoying comments that are hard to call out
Always hearing "not ready yet" for that promotion
Zero women leaders to look up to (or learn from)

It's not about 'just speaking up more' - it starts in your head.

We've all made these promises to ourselves:

"Monday's the day - I'm finally going to speak up in that meeting"
"This year I'll show them what I'm really capable of"
"I need to stop saying yes to everything and set some boundaries"

But then that voice creeps in: "Maybe I should wait..." "What if I'm wrong?" "They'll think I'm being difficult..."

Here's the truth: Just 'acting confident' doesn't work if you don't feel it inside.

That's why the Assertion Mastery is different. Before jumping into how to speak up, we dig into what's holding you back. You'll understand the science of power (yes, it's actually a thing), rebuild your confidence from the inside out, and then learn exactly how to handle those tough situations.

You won't just act differently - you'll feel different.

Finally feel heard and respected

Imagine walking into meetings feeling completely sure of yourself. No more second-guessing or holding back. People actually listen when you speak. Through simple exercises, you'll learn to quiet self-doubt and build real confidence that others notice and respect.

Get the recognition (and promotion) you deserve

You'll learn practical ways to think and speak with more authority. By applying these tools, you'll advance faster, take on exciting projects, and yes - finally getting paid what you're worth - while staying true to yourself.

Take back your time and energy

Say goodbye to overcommitting and absorbing negative comments. Learn to set clear boundaries without guilt and handle criticism with confidence. Focus your energy on what truly matters - your goals, family, and wellbeing.

Ready to advance your career?

Here is everything you will get instant access to when you enrol into the Assertion Mastery:

Bite sized videos and lessons teaching proven frameworks that you can apply immediately - tested and refined by Christina & many other women leaders
Live support from Christina through a private Slack group and 3x 30 mins 1-1 sessions
Real career examples and practical strategies to build lasting confidence and assertiveness
Everything you need to succeed: workbooks, practice guides, reflection prompts, custom tools to track your progress, hacks to quiet your inner critic and more
Lifetime access to all course materials and future updates

Book Your Discovery Call

I have been there myself...

I know what it’s like to work in male dominated environments. For many years, I have worked in manufacturing conglomerates, SME businesses, tech startups and scaleups. Everywhere, I was one of the only women.

I struggled to speak up and showcase my value, blaming it on being introverted. Then my manager said something that changed everything: "Your contributions are brilliant. If only we would hear your voice more."

That wake-up call led me to invest in myself through executive coaching and Harvard Business School training. And I joined Chief, a Senior women’s network, to build my support network and get to know female role models.

The result? The next time I changed jobs, I stepped confidently into a VP role, finally owning my worth instead of doubting it or downplaying my skills.

It now became my mission to help other women in STEM do the same. That is why I created this course.

It took me years to learn many of these lessons on my own. In the Assertion Mastery, I wanted to shorten the journey for you - I carefully curated the most useful tools that can be applied fast.

You will master your assertion mindset and skills in 5 steps:

Each of the steps comes with on demand videos, examples and workbooks to put your learnings into practice.

Part 1: Mindset

Control your thoughts and become confident and assertive from within.

1. Unlock your assertive mindset:
Overcome imposter, stereotype threats and your own biases.

2. Understand your power:
What power actually means & how it influences how assertive you can be and confident you feel.

Part 2: Toolset

Master an assertive working style that commands respect from others.

3. Shift power in your direction:
Learn the secrets of power balance & how to shift it towards you, so you can be more assertive.

4. Communicate assertively:
Draw boundaries and handle strong opinions to make others respect your view.

5. Deal assertively with conflict:
Overcome your fear of conflict and effectively resolve with an outcome that works for all.

Assertion Mastery Bonuses!

Explainer course for your mentor or manager.

Help them see and understand what you are working on, without you having to update them constantly.

So they can support you on your journey in the best way possible.

Includes PDF with conversation prompts for your mentoring calls.

Mini course "Mastering Presentation Anxiety"

3 simple steps to control your mind in high-stakes presentations and interviews, even when you're nervous and your heart is racing.

So you can perform at your best in your most assertive way.

Packed with wisdom of professional musicians and athletes who have to perform perfectly under high pressure.

Includes actionable PDF 5 min ritual to download and use immediately.

Mini course "Increasing the power in your voice"

With secret hacks that actors and singers use to project their voice.

So when you speak up, you are really being heard.

Join The Assertion Mastery

6 week assertiveness course with videos, workbooks, and lifetime access to all materials
Full support system: guided onboarding, real-life examples, quick reference guides, and private Slack group
Optional further 1-on-1 sessions with Christina for personalised guidance
Practical frameworks for confidence, boundary-setting, and handling workplace challenges
100%, no-questions-asked refund policy if you complete all modules and course materials and you still aren’t satisfied with your experience (we doubt it!).

Book Your Discovery Call

Recommended by

Chair of Lean in Equity Scotland (global gender diversity and inclusion social impact organisation).
Managing Partner at Scottish Business Network.

Frequently asked questions

How much does this cost?

The programme costs differ by career stage, as we provide varying levels of support. We will discuss price and payment plan on our call after we have validated we are the right fit for each other.

Can I ask my employer for support?

You will get a template to ask for support from your employer, explaining the learning objective and how it will help you perform better.

We also give free access to a companion course which you can share with your manager to help them understand the concepts and how to support you.

How much time should I dedicate to this?

The course has 5 modules, each of them takes 2-3 hours. The lessons are easy to fit into busy schedules because of the bite-sized actionable content.

We also have a lesson dedicated to help you make time for this course.

Is this also for women who are working in other sectors?

Absolutely! The programme has a couple tailored lessons for those in male-dominated fields, like tech and manufacturing. Apart from those, the concepts are universally applicable. It will help any professional woman wanting to advance in her career.

Can men also take the programme?

Yes. The programme has a couple of tailored lessons for women. They cover how to deal with sexist comments and stereotypes. Apart from these, the concepts are universally applicable. We have seen several male professionals hugely benefit from this.

If I don’t like it, can I request a refund?

We want the investment in this course to be an absolute no-brainer for you – if you’re actually going to do the work 😉 “Do the work” technically involves completing the lessons and worksheets in the modules. If you’ve done that and for whatever reason aren’t 100% happy with your experience, drop us an email (within 30 days of purchasing the course) and we’ll happily refund your entire payment.

Does this really work?

This programme is recommended by several powerful women in Women’s and Entrepreneurial networks, including Cath Strachan, at the Lean In Equity and Scottish Business Network. They have gone through the material and can vouch for the quality.

I can guarantee you will feel different at work after taking this course. If you have completed all modules and worksheets, and that is still not the case, I will work with you personally until you see a change in confidence.

How long will it take for me to see results?

Part 1: Mindset shifts can happen quickly. Our experience is that this course triggers them in you. That means, after one module (1-2 weeks), you will feel a difference at work. Your manager might even notice, as they have with other students.

Part 2: As with any tools - to make them into a habit, it takes about 30 days. The course teaches how to embed the tools in your daily life, so that they become action, not just theory.

How long do I have access to the course materials?

Lifetime access! Including all the updates, templates and bonuses we will be making in years to come.

The aim of the course is to keep on updating as the workplace changes, to make sure it stays relevant and you can come back to it any time.

For major changes, we will send you an email update.

Got a different question?

Book a call

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