We are seeking a hands-on Senior Controller to join our Finance team, with the goal of succeeding the Chief Financial Officer. The Senior Controller should be a proactive, top performing, highly motivated, and an independent self-starter who can roll up their sleeves to get work done but also play an integral role in designing and establishing a scalable finance/accounting function for a constantly expanding family of companies which specialize in proprietary trading, order execution and technology solutions. Ideal candidates will possess superior analytical and reconciliation skills and mastery of Generally Accepted Accounting Principles (GAAP).