Hjalmar is the founder of the world's second largest mobile VoIP service Rebtel.
Prior to Rebtel, Hjalmar was a strategy consultant and entrepreneur-in-residence at Investor AB, providing counsel for investments in the mobile/fixed convergence arena.
Before that he co-founded and spent seven years as CEO of mobile technology innovator Sendit AB, successfully taking the firm public before it was acquired by Microsoft for $150m.
Hjalmar is on the board of one of Europe's largest multimedia groups - Axel Springer with 12000 employees, €3bn turnover and several hundred media like Europe's largest magazine Bild.
He is also Venture Partner at Creandum, one of the largest Nordic Venture Capital Firms and advisor to Europe's most successful private equity firm EQT.