Associate Partners

Marjon Margés

MarjonMargesMarjon is a very experienced executive consultant at senior management level, specialising in business development, succession issues, executive search, career counseling and (team) assessments, HR strategy, organisational design, including competency frameworks, talent/knowledge management and running project management offices. Her clients come equally from the profit and non-profit sector and include family-owned businesses and governmental organisations in addition to commercial companies.

Her initial career was in Dutch central government. Thereafter she had a management career as international marketing executive and business line manager. In addition to working for Wang Labs and Rank Xerox, she was successful at Lucent Technologies EMEA and Philips Electronics & Semiconductors working on the development of small size colour displays for handhelds (smartphones, tablets), international marketing, communications & sales of networking equipment IT/automation systems and software, working in Silicon Valley and Hong Kong. Marjon then started her consultancy career working for Mercuri Urval.

For a number of years she was an Executive Partner of the Hague-based Nassau Group responsible for management consulting, strategic HR, executive search & selection, and (global) team assessment for the profit and not-for-profit sector

Marjon studied Sociology in Business at Leiden University, International Business Management at INSEAD in Fontainebleau and is a Registered Marketing Executive (RM) at NIMA/EMCF with the highest possible European qualifications.

Marjon consults both independently (UMEO Advies) and with Valshebnik Consulting. She has completed 10 projects together with Gary Hays for the European Space Agency and they have collaborated on projects for the oil and chemicals industry in the Middle East.

Dirk Verburg

Dirk VerburgDirk is a management consultant and executive coach who specializes in transforming business strategies and strategic goals into tangible business results through planned, structured and inclusive change management.

He worked for consulting firms (PA Consulting Group), as well as for corporate organizations (AT&T, Shell, Swiss Re, Covidien and Credit Suisse).

He specialises in culture change, project management, organisational effectiveness, competence mapping, team effectiveness & executive coaching, via partnership, a hands-on approach, using tools & methodologies in a safe environment.

Dirk has a Masters Degree in Sociology (MSc University of Amsterdam – with distinction) and Business Administration (MBA – University of Sheffield).

Dirk is currently Executive Vice President Talent & Leadership Development for Lee Hecht Harrison in Switzerland and consults both independently ( and with Valshebnik Consulting.

Sonja Wekema

Sonja WekemaSonja is a trusted executive consultant, specialised in culture transformation, leadership development & executive team coaching and international human resources.

Her initial knowledge and experience was gained through working as Management Consultant with Capgemini for various clients in both the public and private sector. Thereafter, Sonja worked for Shell from 2006-2017, where she held various roles as HR Generalist and Project Manager, a.o as Senior Consultant at Shell’s HQ responsible for the Global Employee Engagement strategy and as the Global HR Manager for Shell Chemicals.

Sonja holds a Master in Communications (with minors in International Relations) from the University of Groningen (NL), studied Organisation Design at CIPD (UK) and aims to finalise a Masters in Executive Coaching at the Ashridge University in London (UK) in 2020.

Sonja consults both independently ( and with Valshebnik Consulting.

Saule Menane-Zhonkebayeva

Saule Menane-ZhonkebayevaSaule is an experienced Organisational Development professional with front line business experience and a track record working with a demonstrated history of working with leaders, board members and diverse cultures. She is skilled in change management, group process consulting, team effectiveness, large group interventions, employee engagement and Organisation Effectiveness.

She started work as a financial Analyst for the European Bank of Reconstruction & Development before working on financial models and business planning for WS Atkins and PSEG Europe. She joined Shell in 2001 as a Senior Business Developer & strategist in the Gas & Power and Renewables business before becoming Business Improvement Manager for the global Shell Shared Business Centres. She was then promoted to Organisational Effectiveness Consultant for Shell International moving later as Organisational Effectivenss Consultant for Brunei Shell.

Saule has a BA in Economics from the Kazakh University of Economics and an MBA from Warwick University UK, in addition to graduating from the NTL Organisational Development Practitioner programme and is a certified coach. She is fluent in English, French and Russian.

Saule consults both independently (she is currently based in Abu Dhabi) and with Valshebnik Consulting, with whom she developed an organisational effectiveness proposal for Sibur Chemicals.

Saule consults both independently and with Valshebnik Consulting, with whom she ideveloped an organisational effectiveness proposal for Sibur Chemicals.

Andrey Chepurnov

Andrey ChepurnovAndrey is a seasoned HR professional with experience in training and development, succession planning, organizational development, performance management, resourcing, recruitment and HR operations functions, including Russian labour negotiations and HR systems, in the energy, tobacco and automotive industries, often for international companies based in Russia.

He started working for Philip Morris as Manager of Organisational Development & Resourcing and as the General HR Manager, before becoming Director HR for Continental Tyres. Andrey then joined Shell as Manager Attraction & Recruitment before moving to TNK-BP as Director Resource Planning & Recruitment and Director Operations. He then became Manager Learning & Development at Sakhalin Energy before moving to KazMunayGas in the Business Transformation Team in Kazakhstan. He has also worked as a consultant for Formatta, as an expert in assessment methodology and was until recently HR Director for Nipigas back in Russia.

Andrey has a degree in English, Chinese & Journalism for the Military University in Russia and a certificate in Organisational Leadership from INSEAD. Andrey is fluent in English & Russian.

Andrey is currently Human Resources Director at International Bank for Economic Co-operation (IBEC) in Moscow and has worked with Valshebnik Consulting on the audit of HR processes for Eataly Moscow, in particular to ensure that the Eataly Values, necessary for business success, were fully embedded.

Ilyas Yechshanov

Ilyas is an all-round HR professional and management consultant who specialises in HR Strategy, organizational design, total rewards, job evaluation, personnel assessment, assessment techniques and performance appraisal.

He worked for the consulting firms EY People Advisory Services (as senior consultant), Samruk-Kazyna Corporate University HR Consultancy group (as head of the consultancy) and VRV Consultants, an executive search company.

Ilyas has worked for local, national and international companies in Kazakhstan, Russia and Uzbekistan in a range of different industries: FMCG, telecoms, pharma, finance, bank, oil and gas, mining and chemicals.

Ilyas has Masters Degrees in International Human Resource Management (MSc Kingston University) and International Relations (MA Al-Farabi Kazakh National University, Kazakhstan) and is an Associate of the UK Chartered Institute of Personnel and Development (CIPD). He is fluent in English and Russian.

Ilyas is currently Director of Development at Sharua (Kazakhstan) a diversified, fast-growing company providing services in hazardous waste management, recycling hazardous plastic; crop protection and warehousing, but continues to consult both independently and with Valshebnik Consulting.