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My name is Alister Fair

Crude Calculations specializes in providing consulting services in Microsoft Excel for the oil and gas industry. I have 20 years experience in oil and gas accounting, and can help you streamline and optimize your financial processes.


About Me.

Crude Calculations is a consulting service specializing in Microsoft Excel for the oil and gas industry. I am a Chartered Accountant with over 20 years of experience. I have worked in different countries and continents, and I am passionate about understanding my clients’ pain points and helping them solve their problems.

Whether it's an Excel issue or a finance-related one, I'm here to help you. Contact me today and let's get started on finding a solution that works for you.

Career Summary

2022 - to date

Revenue Accountant

Aberdeen, UK

O&G Operator

Work in a team of 4, that generate circa $0.5bn invoices per month. Supported integration of two legacy systems on to SAP S/4 Hana. Generate and analyse weekly, 14 week cash flow.

2016 - 2021


Northern Iraq

O&G Operator

Managed team of 8, inexperienced, locals and built skills. Delivered on time monthly, quality closes. Created & submitted monthly JV billing and quarterly PSC reporting. 

2012 - 2015

Business Analyst

Stavanger, Norway

O&G Operator

Business Analyst for 4 operated assets. Created, analysed all budgets and forecasts & presented to the JV Mgmt. committee. My cost analysis started a cost reduction programme that enabled the commercial & ops team to reduce opex by 15%. 

Career (continued)

2010 - 2012

Senior Corporate Accountant

Stavanger, Norway

O&G Operator

Submitted 7 quarterly closes on time with no post close correcting entries. Led Norway project to change reporting currency from CAD to USD.  

2009 - 2010

Supply Chain Analyst

Aberdeen, UK
O&G Operator

Led UK project that reduced overdue invoices by 80%. 

2001 - 2009

Project Accountant

Global Consulting Firm

Worked on finance projects in UK & Europe. Supported Statutory Account preparation, SOX, year end closes, integration of acquisitions, process improvements (I was trained in Lean & Six Sigma). 

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