Adidas, ABB, Abbott Laboratories, ADM Direct, Accenture, Access Business Group, AIG, AIR PRODUCTS, AgrEvo, Alcatel-Lucent, Alior Bank, Allianz, Antalis, AMGEN, AmRest, Ardagh Glass, Arrow ECS, Atlas Copco, Avanssur, Aviva, AXA DIRECT SOLUTIONS, Axalta Coating Systems, Axel Springer, Bacardi-Martini, Bank Millennium, Barry Callebaut, BASF, Bayer, Beckers, Benefit Systems, Berlin-Chemie Menarini, BMW, Boehringer Ingelheim, BP, Bridgestone, Bunge, British American Tobacco, British Council, BSH, Camaïeu, Canon, CAN-PACK, Cargill, Carlsberg, Carrefour, Castorama, CD Projekt, CEMEX, Circle K, Citibank, Coca-Cola Amatil, Coffee Heaven, Comp, ConocoPhillips, Colgate-Palmolive, CPC, Crédit Agricole, Credit Suisse, Dalgety Agra, Danfoss, Danone, DB Schenker, Deloitte, Delphi, Dendro, Deutsche Bank, DHL, Diners Club, DNB Bank, Doka, DPD, Dr Gerard, Dr. Oetker, DROMET, DuPont, Dow AgroSciences, Ecco Shoes, EJOT, Electrolux, Empik, Energa, Ernst & Young, Esso, Firmenich, Flextronics, FM Bank, FRoSTA, Fujitsu, Géant, Geberit, Gedeon Richter, GEFCO, General Motors, Ghelamco, Gillette, GlaxoSmithKline, GO Sport, Goodyear Dunlop, H+H, Henkel, Heinz, Hikvision, Honda, Hoya Lens, IKEA, Imperial Tobacco, ING, Inteligo, Innogy, Jones Lang LaSalle, Johnson & Johnson, JTI, JYSK, Kapsch, Kraft Foods, Lafarge, Lantmannen SW Seed, Lagardere Duty Free, La Lorraine, LeasePlan Fleet Management, Leroy Merlin, Microsoft, Liberty Direct, Monsanto,  Let`s Go, Link4, Lisner, LM Wind Power Blades, Maersk, Makro Cash and Carry, MAN Bus, Mead Johnson Nutrition, Mercedes-Benz, Minolta, Miele, Mostva, MRS SPORTY, Mundipharma, MSD, Navo, Neste, Nestlé, Netia, Nike, Nikon, Novartis, Office Depot, Orangina Schweppes, Oriflame, PanLink, Pepco, PepsiCo, Pfizer, Pilkington Glass, Philip Morris, Philips, Pierre Fabre Médicament, Polkomtel, Polpharma, Raiffeisen Bank, PZ Cussons, Reckitt Benckiser, Renault, Robert Bosch, Rockwell Automation, Rockwool, RR Donnelley, Sage, Sagemcom, Saint-Gobain, Sanite, Sanofi-Aventis, SUMI - AGRO, Sephora, Shell, Siemens, Siniat, Sodexo, Sony, Sygma Banque, Symantec, Tarkett, Tchibo, The Royal Bank of Scotland, Tikkurila, Timac Agro, TIM Call Center, Timex, Tetra Pak, Top Farms, Total Petrochemicals & Refining, Toys ”R” Us, Trouw Nutrition, Unilever, Valeo, Veriplast, Viessmann, Virgin Mobile, Volkswagen, Warta, Whirlpool, Wrigley, ZenithOptimedia...

I have worked with Joanna Kalkstein for 20 years and she has always been one of TACK International’s leading global partners. Her company - Kalkstein Pty Ltd - is an exceptionally professional training company delivering top quality courses based on thorough needs analysis. Joanna is a highly ethical and energetic entrepreneur and business leader who practises what Kalkstein’s courses teach. Her international experience and understanding of cross cultural management add an extra dimension to her company’s abilities. I can strongly recommend Joanna Kalkstein to both multinational companies and local Polish businesses.

Eric Pillinger

Director at TACK International

Many thanks to the Kalkstein team for the completed training project. Our cooperation with Kalkstein began in 2015. After a year we decided to extend the project, introducing additional workshops and coaching activities.  We were convinced by more than one year's experience of cooperation with Kalkstein and the high level of professionalism noticeable not only in the effectiveness of training, but also everyday by the way they manage the entire project. Particular praise for the way of conducting workshops and transferring knowledge in close connection to our industry. Kalkstein trainers with whom we had the opportunity to work, make great contact with the group and transfer the content in a very attractive way - skillfully activating the participants and effectively developing competences in question.

Undoubtedly, we will carry out several interesting projects together in the future and we are really looking forward to it.



I summary, we can recommend Kalkstein as a reliable I highly professional Partner.


On behalf of the Trouw Nutrition Polska team


Anna Gardocka

HR Manager

Training, interesting, intense, but not tiring! The coach

was great, with loads of knowledge, able to quickly integrate the group. A large

amount of very useful and practcal tips to be applied in my presentations


Radosław Bończak

Doradca ds. sprzedaży i promocji

INNVIGO Sp. z o.o.

Joanna is a natural born leader & entrepreneur with seemingly inexhaustible reserves of positive energy and that contagious kind of passion and drive that gets others moving, too. She's smart, responsible, focused and has a high level of empathy to deal in the best way with customers, co-workers and partners. She has a fantastic talent to establish trust, connect with and engage people around her especially related to her crosscultural knowledge. I can wholeheartedly recommend her for any organisational & personal development project.

Dr. Monika V. Kronbügel

Managing Director

Global DiVision GmbH International Consulting

Highly recommended! Very interesting and professional training!

Thank you Halina Świątek for sharing your time and knowledge!

Tomasz Markiewicz

Insurance Specialist
Mercedes-Benz Insurance

My first such valuable training program!

Sławomir Chabiera

National Key Account Manager

Mercedes-Benz Polska

I am really happy with the content of the training and the way it was delivered.

Agnieszka Urbanowska

Z-ca Dyrektora Zarządzania Ryzykiem

Mercedes-Benz Bank Polska