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SIAO is an independent Nigerian professional services firm, providing Audit Assurance, Accounting, Tax, International Financial Reporting Standards Advisory, Human Resources and Financial Advisory Services.

The firm boasts a crop of seasoned professionals who have local and international experience with organisations of international repute.

We are well positioned to become a one-stop shop for financial advisory services and business assurance.

The Consulting Department advises public and private sector organisations about key strategic issues…

Our risk assurance team has for several years, helped clients mitigate risk and prepare for the future.

The Human Resource Consulting Department consistently provides bespoke solutions that solve peculiar HR challenges.

Our Legal and Compliance Department is a leading regulatory consultancy unit that provides support for organizations…

What we Offer

With a professional staff strength of over 100 highly qualified and dedicated personnel, we pride ourselves as being Nigeria’s largest indigenous professional services firm.

SIAO has audited and consulted for various sectors of the economy: Engineering, Oil and Gas, Finance, Public Sector, Telecommunications and Manufacturing. Our broad range of services includes: Strategic Planning, Financial Advisory, Project Evaluation and Financial Systems Design and Upgrade, Tax Advisory and Compliance services, Human Resource Consulting services, Management Consulting, Legal advisory and compliance services, Financial Accounting and Risk Assurance services among others.

Our level of responsiveness and commitment to our client’s needs distinguish us from our competitors; we have developed an approach to assignments and projects that works well for us and our client, and guarantees excellent results.

Get in touch with us

Why Choose Us?


We have over 20 years experience providing expert financial advice.


A young, enthusiastic team of advisors are always here to help.


Our financial specialists ensure you get the optimum results.

For expert guidance and know-how you can trust SIAO

Frequently Asked Questions

These are just some of the most common questions we get asked. For anything else, please contact us – we would be delighted to help.

What kind of financial advice do you give?

Do you offer individually tailored plans?

What industries do you specialize in?

Helping Small Businesses just like yours


Satisfied Clients


Projects Completed


Team Members


% on-time completion

Get in touch

We can provide you with the economic data so you can make better decisions about your business.

Send us a message

Your Name

Email Address

Phone Number



Contact Information

Lagos Office

18b Olu Holloway Road,
(Former Temple Road),
Off Kingsway Road,
Ikoyi, Lagos.
Tel-01 463 0871 2

Do you have questions about how SIAO can help your company? Send us an email and we’ll get in touch shortly.