About Cosil Solutions Ltd

Insley Ettienne has spent over 20 years working in and around the UK housing and property sectors. Her background spans court and tribunal proceedings, leasehold governance, service charge management, compliance and strategic dispute resolution. She has worked on complex, high-value cases as a Court Officer.

She founded Cosil Solutions to provide structured, direct support grounded in real operational experience. The practice is designed to support senior decision-makers, compliance officers, legal teams and individuals facing situations where a wrong step carries real consequences.

Insley holds a Postgraduate Diploma in Law (PgDip Law) and is an accredited civil and commercial mediator. She is an associate member of the Chartered Institute of Arbitrators (CIArb) and a certified litigation and commercial paralegal. She also serves as a Tribunal Judge in the First Tier Tribunal (Property Chamber), giving her a rare combination of insight and authority.

Qualifications and recognition

Accredited Civil and Commercial Mediator

MSDUK Certified Supplier

PgDip Law, BPP University

Most Innovative Preventative Mediation Services Provider 2025

Court Officer: complex and high-value cases

20+ years in housing, litigation and dispute resolution

10+ years of litigation experience, court and tribunal

SME News Greater London Enterprise Awards 2025, Winner

Trustee, Lambeth Mediation Service

Advocate Mediator of the Year 2024, Finalist

The R.E.S.O.L.V.E. Framework

All Cosil Solutions work is structured using the RESOLVE framework. This is a proprietary methodology that brings consistency and accountability to every engagement. It ensures each matter is properly diagnosed before any intervention is designed, that stakeholders are understood and aligned, and that outcomes are proportionate and documented. The framework applies equally to a single mediation session and a complex multi-month consultancy engagement.

Strategic and Structured

Clear objectives, steady progress and proportionate action.

Collaborative and Practical

Open communication and grounded, workable solutions.

Clarity and Confidence

Issues and evidence are structured so decisions feel informed and controlled.

Outcome-Driven

Practical agreements that support long term improvement, not short term fixes.

Proven Impact

Saves time, reduces cost and supports better decision making through structured intervention.

Learn about our services or view our pricing.

We work systematically

We look at patterns, root causes and the cumulative decisions that determine how a situation develops. We do not respond to surface presentations of a problem without first understanding what is driving it.

Independent guidance

We work alongside internal teams and legal advisers. We do not provide legal advice. Our role is to provide independent structure, clear analysis and practical guidance. All engagements are handled with discretion.