The corporate finance advisory firm

Supported by a strong network of senior consultants with more than 15 years average of professional experience in big-4 corporate finance departments, we assist our clients in their corporate strategy and risk management.

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Birsary Advisory helps companies to create long-term value for all stakeholders

Enabled by senior experience and industries insights, our corporate finance services provide trust and assurance through comprehensive financial advice and execution expertise. We accompany private and public companies in their transformation and growth.

Crossed Arrows

Transaction Services

Financial due diligence (buy-side and sell-side).

Valuation works and M&A support (Teaser and Info Memo preparation + LOI negotiation).

SPA negotiations support.

Price adjustments analysis and earn-out calculation.


Restructuring & Disputes
resolution / Arbitration

Financial analysis in the context of operational restructuring plans.

Working capital diagnosis & optimization and Short-term cash forecast modelling.

Support of testifying expert witnesses in investment and commercial international arbitration (damages quantification).

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Oil & Gas Consulting

Upstream Exploration & Production Joint Venture audits (Revenues, Opex and Capex reviews).

Farm-in/outs financial due diligences.

Procurement and contracting assessment: vendor audits and tender process reviews.

Internal control assessment & design of cost allocation methods.


A tailormade approach served by experienced professionals

The commitment to our clients and their objectives is a key vector of the quality of work we produce. We work under high ethical standards, ensuring that no conflicts of interest will alliterate our conclusions.

Birsary Advisory core values:

  • Dedication – We believe that hard work, enthusiasm and empathy characterize our services.
  • Loyalty – We provide complete commitment to our clients along with a reasoned critical thinking.

Birsary Advisory has intervened in a wide variety of cases

Crossed Arrows

Transaction Services

Financial due diligence

Financial buy-side due diligence and SPA negotiations (net debt and working capital adjustments) for the acquisition of various food and feed testing laboratories in Spain.

Vendor assistance

Financial vendor assistance in the context of the sale of the Spanish perimeter of an international company operating in the business process services.


Restructuring & Disputes resolution / Arbitration support

Assistance to restructuring plans

Financial report explaining the causes of a restructuring plan of a Spanish subsidiary of a French Pharma company (assistance in the negotiations with employees’ representatives).

Support in international arbitration

Support to testifying experts (quantum and industry reports) in the context of comercial and investment arbitration proceedings (in the oil and gas industry).

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Oil & Gas Consulting

Joint Venture audits

Joint Venture audits of E&P assets located in South America and North Africa. Reviews focused on Operator’s overhead cost sharing and affiliates’ technical and administrative agreements.

Internal audit investigation

Vendor audit in the context of an investigation of a potential breach of contract (technical specifications not compliant) – downstream activities.

About us

Birsary Advisory provides senior corporate finance expertise

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Birsary Advisory has a flexible structure

and can count on its own network of senior consultants with an average of more than 15 years of professional experience and previous experience in big-4 corporate finance departments.

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Birsary Advisory also has collaboration agreements

in force with other consulting firms and freelances consultant platforms which can bring specific support, if required by the projects.

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The team is composed of international experts

with a strong track-record of projects mainly executed in French and Spanish-speaking countries (France, North-Africa, Spain and Latin America).

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Since its creation in 2019, Birsary Advisory

has (i) executed many consulting projects in the Oil & Gas sector, (ii) performed several financial due diligences, (iii) advised various distressed companies in the context of restructuring plans and (iv) provided support to testifying experts in the frame of litigation & international arbitration processes.

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Building lasting relationships.
Let’s meet and talk!

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