Calco is a young, innovative, and ambitious organization. We specialize in training, secondment, and coaching IT professionals, and since our establishment in 2004, we have assisted over 4000 professionals in achieving successful careers in their respective fields. Providing personal attention to our employees is crucial because at Calco, we believe that you can achieve the most when you are truly in the right place for yourself.
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Calco Questions
The Calco annual revenue was $132.6 million in 2026.
Jan-Willem Gelderblom is the CEO, Algemeen Directeur of Calco.
180 people are employed at Calco.
The NAICS codes for Calco are [561, 56].
The SIC codes for Calco are [7361, 736, 73].
Top Calco Employees
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Jan-Willem Gelderblom
CEO, Algemeen Directeur at Calco
Gorinchem, ZH, NL5 -
Tom Olijve
CEO at Calco
Amersfoort, UT, NL21 -
Cindy Gihaux
Chief Financial Officer at Calco
Hoofddorp, NH, NL1 -
Hubus Calhoun
Founder at Calco
McKinney, TX, US14 -
Yvon Schoenmakers
HR and Legal Manager at Calco
Amsterdam, NH, NL11 -
Bart Versteeg
CCO at Calco
Apeldoorn, GE, NL -
Sander Sierdsma
Head of Sales at Calco
Heerenveen, FR, NL21 -
Bart Mendoza
Marketing Lead at Calco
San Diego, CA, US2 -
Ken Gresham
Office Manager at Calco
Jackson, MS, US11 -
Nicole Tjan
Business Developer at Calco
Amsterdam, NH, NL2
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