Investigation Services

Corporate & Workplace Investigations

GSA provides trusted Corporate Investigations and Workplace Investigations for organisations facing sensitive, high-impact issues that demand independent and objective examination. We are engaged when allegations, concerns, or incidents require clarity, discretion, and a rigorous evidence-led approach. Our investigators support HR, Legal, Compliance, and senior leadership teams by establishing facts, assessing conduct, and testing evidence in a structured and defensible manner. Whether addressing misconduct, whistleblowing, safeguarding concerns, or complex behavioural matters, our Corporate Investigations and Workplace Investigations are conducted with fairness, legal awareness, and strict confidentiality. Each engagement is handled with sensitivity and professionalism, ensuring outcomes that protect individuals, uphold organisational standards, and safeguard reputation across corporate, NGO, public sector, and international environments.

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Private Prosecutions

GSA supports organisations, and private clients with private prosecutions where criminal wrongdoing has occurred and a robust, independent legal route is required. GSA conduct thorough, evidentially sound investigations using experienced ex police criminal investigators with a detailed understanding of evidential standards.

Our team gathers and preserves admissible evidence, conducts witness interviews, forensic examinations, prepares case files, and supports disclosure obligations to ensure prosecutions are fair, proportionate, and legally defensible. Private prosecutions are often pursued in cases involving fraud, theft, financial crime, misconduct, safeguarding failures, or where public prosecution is delayed or unavailable. Throughout the process, GSA maintains strict confidentiality and governance, supporting clients from initial assessment through to case progression and resolution.

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Due Diligence Services

GSA conducts comprehensive due diligence investigations to help organisations make confident, well-informed decisions when hiring, partnering, investing, or engaging third parties. Our work combines regulatory-aligned checks, open-source intelligence, discreet enquiries, and investigative analysis to assess financial, reputational, and legal risks. Whether supporting senior appointments, supplier vetting, M&A activity, or NGO safeguarding requirements, our due diligence provides clear, evidence-based insight to protect your organisation from regulatory, financial, and reputational harm.

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Fraud, Financial & Regulatory Investigations

GSA delivers targeted fraud investigations, financial investigations, and regulatory investigations across the UK and globally. Our team uncovers financial crime, internal fraud, bribery, corruption, financial irregularities, and compliance breaches through forensic analysis, evidence review, and discreet intelligence-led enquiries.

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Open-Source Intelligence OSINT & Digital Investigations

GSA’s open-source intelligence (OSINT) and digital investigation services deliver comprehensive insights into individuals, organisations, and situations by conducting detailed social media checks, digital footprint analysis, and advanced threat intelligence assessments. This approach helps clients identify hidden risks, verify integrity, and make informed, defensible decisions.

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Physical and Technical Surveillance

GSA provides discreet physical and technical surveillance services to support investigations involving misconduct, insider threats, fraud, and complex behavioural risks. Our specialists use lawful, intelligence-led surveillance techniques to observe activities, verify concerns, and gather reliable evidence that may not be accessible through interviews or documentation alone. Through a combination of on-the-ground surveillance, digital monitoring tools, and technical surveillance capability, we deliver clear, actionable insight that supports legal, HR, and operational decision-making, while maintaining the highest standards of confidentiality, proportionality, and regulatory compliance.

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Crisis Management Response & Incident Management

GSA Global’s experience in managing major crises underpins our ability to advise Boards and senior leadership on resilience strategy, crisis planning, and post incident recovery. We support organisations before, during, and after high impact events, strengthening preparedness and guiding decisive action under pressure. We deliver robust testing of crisis management, business continuity, and recovery arrangements to ensure leadership teams are ready for complex scenarios. When additional capacity is required, GSA can rapidly deploy vetted, highly skilled personnel across risk management, safeguarding, stakeholder engagement, complex case handling, and multi agency coordination. GSA also provides managed assessment and identity control services, having mobilised large scale teams to meet urgent government requirements for identity verification and security vetting. These capabilities draw on our experience leading complex security operations and our network of trusted partners and specialists.

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