Professional Advisory Companies in Europe

ONISIS Consulting is a boutique financial-management advisory firm helping growing small and medium enterprises (€3M–€50M turnover) identify where money is lost, where capital is trapped, and which strategic decisions to make first.

We envision a generation of resilient enterprises: businesses that lead their sectors, stand on solid liquidity, and build lasting value that endures over time. Our mission is to unlock trapped value inside them, giving business owners the momentum and confidence to scale sustainably and stay competitive.

Founded by Konstantinos Kormentzas, a former banking C-level executive (CRO/Auditor/COO), ONISIS acts as an objective, un-fogged "second brain" for business owners. We combine executive-level banking rigor with agile operational execution, replacing generic advice with clear, empirical numbers.

Our Core Service Offerings:

• Fractional CFO Advisory: Senior-level financial governance, board-level sparring, and ongoing financial oversight without the overhead of a permanent C-suite hire.

• Cash Flow & Working Capital Optimization: Releasing trapped liquidity in receivables and slow-moving inventory to self-fund expansion and eliminate unnecessary debt.

• Profitability Enhancement: Granular customer- and SKU-level margin analysis to stop profit leakage from unmeasured discounts and legacy trading terms.

• Business Intelligence (Power BI): Custom executive reporting architectures that establish a Single Source of Truth (SSOT) across operations for five-minute decisions.

• Strategic Financial Planning & Financing: Bank-grade business plans, scenario forecasting, and debt restructuring advisory to secure financing on optimal terms.

Our team of professionals at KSA Group are all passionate about saving viable businesses and giving the best possible advice to directors, creditors and stakeholders in any insolvency situation. Many of our team have had direct personal experience of business distress and have felt that there are better ways to advise all those involved. Our team is headed up by Keith Steven, the managing director, Iain Campbell, the operations director, and our 2 licensed insolvency practitioners; Wayne Harrison and Eric Walls.

Our corporate advisors have many years of experience of talking to and negotiating with creditors, including banks and HMRC. The regional managers have all held senior positions in companies and know how to help businesses in distress.

Advisory AI is the world's first AI-Copilot for financial advisors and offers cutting-edge AI software, revolutionizing how they create and manage advisory documents. With our intuitive platform, financial professionals can automate any advisory document in just 5 minutes, saving time and increasing productivity. We specialize in automating critical reports, including Annual Review Reports, Suitability Letters, Meeting Notes, Provider Information Summaries, Pre-Meeting Prep, and Follow-up Email Summaries. Our technology streamlines the advisory process, ensuring financial advisers can focus on delivering exceptional client service while reducing administrative workload. Let Advisory AI empower your practice with efficient, AI-driven solutions tailored to the needs of modern financial advisors.

ABX delivers an integrated advisory platform combining operational consulting, CBAM compliance management, customs procedure analysis, technical support in customs disputes, and customs digitalization.

Our approach enables importers to convert complex CBAM obligations, customs data, and international trade risks into a structured system for governance, regulatory compliance, risk mitigation, and strategic business decisions.