Are you interested in improving your skills and would like to receive tips and tricks from professionals? Are you more comfortable with discussing these 1-on-1 rather than in front of an audience?

Then catch your coach on 14 November 2025 at TOPX Summit! In these sessions, you can have a 1-on-1 meeting with the present coaches below to ask your questions and get advice!

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Coaches Present for catch your coach sessions

Jane Sum

Jane Sum is a certified leadership and executive coach with 20 years of international corporate experience. Before founding her coaching practice, she held senior technical and commercial roles in the chemical industry across Europe and Asia, leading diverse teams and working at the intersection of science, business, and people. Jane works with professionals and leaders navigating change, growth, and complexity - whether in their careers, leadership roles, or personal development. She brings a genuine and insightful approach, helping clients embrace their strengths, build confidence, and make conscious, values-based choices. She supports individuals to overcome self-doubt, reconnect with their purpose, and create meaningful impact in their work and lives. Her multicultural background - having lived and worked in the Netherlands, China, Thailand, Japan, and Germany - gives her a strong appreciation for different perspectives and the ability to support people in diverse, international settings. Jane is passionate about fostering inclusive spaces where people feel seen, valued, and empowered to thrive. Alongside coaching, she contributes her expertise to advisory and non-executive roles in both start-up and non-profit sectors. She holds a PhD in Organic Photochemistry and is a Professional Certified Coach (PCC, ICF). Jane is based in The Hague and works in English and Dutch.

Vera Gelissen

Vera Gelissen inspires with personal stories, practical exercises and will make you leave with a plan for action.Vera Gelissen brings a wealth of experience and expertise to the table. With an academic background and a powerhouse CV that includes leadership stints at organisations like Bosch, Coca-Cola, and DAF Trucks, Vera is no stranger to the challenges and intricacies of thriving in male-dominated domains. She combined a fulltime international career with raising a family. Some years ago her journey took a pivotal turn when she chose to redirect her energy from shaping corporations to empowering individual spirits.From her earliest days, Vera's fascination with gender dynamics and the experiences of women in the workplace ignited a passion within her. Armed with a commitment to drive positive change, she immersed herself in the study of gender bias and diligently observed the challenges that befell women within her professional orbit. This has made her a maestro in understanding the unique hurdles faced by talented women in male-dominated environments. More importantly, she's equipped with tested strategies to help you navigate these challenges, seize opportunities, and truly shine!

Expect nothing but a blend of warmth, respect, razor-sharp analysis, and an occasional hearty laugh when you're with Vera.

Barbara Rogoski

Barbara Rogoski is an American executive communication coach for Fortune 500 companies, successful SMEs and female founders. Her focus, through her company, Successful Speaker Now, is to help business professionals to tell their stories with confidence, clarity and impact. She is a senior TEDx coach and has coached more than 200 TEDx speakers worldwide. Barbara is also a published author of Boring to Brilliant, A Reference Guide for Speakers, a professional speaker, mentor and web shop owner. Her wide range of knowledge about effective communication, combined with her entertaining and inspiring style of empowerment, makes her a popular speaker, trainer and coach.

Karen Rensma

With a background in chemical engineering and psychology, Karen is advisor and (leadership)coach to female leaders to grow their authentic leadership and bring their full selves to work. So that they confidently, effectively and authentically manoeuvre, flourish and advance their careers beyond the glass ceiling within often masculine organisations. She is committed to contribute to achieving gender diversity in decision-making in organisations, as she believes this will catalyse thriving and inclusive organisations and society. Characterisation of her advice and coaching approach: She cares and challenges. She uses rationality and intuition. Outspoken and nuanced. She takes both your ambitions and doubts seriously. Honest feedback and not afraid to mention the elephant. Working with Karen has catalysed many female leaders’ careers and their leadership development: from women taking on their first leadership role who want to explore and define their way of leading, to senior female leaders embarking on the Management Team who want to find their way into leading with impact and authenticity in the new dynamics that come with their new role. Karen also hosts the podcast Voorbij het Glazen Plafond. She interviews leaders about their personal experience with roadblocks along their career path and how they overcame them, their vision on gender diversity and inclusion plus their tips on what we all can actually do to get there.

Adda van Zanden

Based in Amsterdam, Adda van Zanden brings over 20 years of expertise as aleadership consultant, public speaking coach, and facilitator. She collaborates with organizations such as Leeuwendaal (The Inclusive Government), the Dutch Ministries of Infrastructure and Defense, TEDx, and multinational corporations to drive impactful leadership and communication strategies. As a professionally trained actress, Adda integrates voice and body-language techniques from the Royal Shakespeare Company into her work, enhancing the presence and impact of leaders. She also tours Europe with the play Shakespeare’s Women, exploring female narratives through a theatrical lens.
Her commitment to gender equality is reflected in her leadership roles, including Chair of Women of Volt, where she has championed the advancement of women in European politics. She has designed inclusive communication & leadership programs based on political and behavioral science research, empowering European politicians and corporate leaders alike. A sought-after speaker, Adda has shared her insights on gender equity, leadership,and overcoming bias at major global platforms. She regularly delivers lectures and training programs for multinationals such as Royal BAM Group, Rabobank, CGI, and DLL in the Netherlands and the US, focusing on creative thinking, adaptability, and diversity in leadership. With her expertise in public speaking and panel moderation, she ensures meaningful dialogue and high-impact outcomes. Additionally, she serves as HBA Ambassador Program Advisor, furthering HBA’s mission for gender equality in healthcare leadership. 

Mira Vasic

Dr. Ing. Mira Vasic is a serial entrepreneur, leading corporate trainer, and international keynote speaker with expertise in Diversity & Inclusion and female leadership. She helps individuals develop strategic leadership skills and organizations build truly inclusive cultures. Mira has taught IEMBA courses at Geneva Business School and Politecnico di Milano Business School, and she is a Senior Partner and co-owner of In Touch Female Career Academy since 2020. She is also the founder of femlinq, a global women's network empowering expat women, and a passionate ambassador for women’s health and endometriosis awareness. With over 15 years of experience as a researcher and consultant in both the private and public sectors across Serbia, Spain, Greece, Italy, and the Netherlands, Mira brings a unique cross-cultural perspective to her work. She holds a PhD in Structural Engineering from Politecnico di Milano and speaks four languages fluently. Her signature strengths is a contagious enthusiasm, a sharp strategic mind with a great sense of humor.

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