Our Profile

SIAO is a merger of four Firms. The combined Firms are Smith Sule and Associates, Ighodalo & Associates, OA Financial Consulting Limited and Robert Ade Odiachi & Co.

The name of the Firm was coined out of the first letter of the surnames of each of the founding Partners. S-Smith, I-Ighodalo, A-Adewale (a retired partner), O-Odiachi.

It is an independent Nigerian professional services firm which boasts a crop of seasoned professionals with local and international experience positioned to providing excellent financial advisory services and business assurance. Specifically, the Firm is managed by Alumni of KPMG, PWC, EY, PKF Professional Services and Grant Thornton.

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.

Our professional competence has seen us audited and consulted for various sectors of the economy such as Engineering, Oil and Gas, Finance, Public Sector, Telecommunications and Manufacturing amongst others.

We pride ourselves in always being at a high level of responsiveness and commitment to our client’s needs. This distinguishes us from our competitors and also guarantees excellent results for repeat business.

Our Vision

A one-stop expert professional services firm for business solutions.

Our Mission

Providing clients with flawless services backed by expert knowledge and innovation from highly motivated and integrated teams.

Our Core Values

  • Stewardship
  • Client Centricity
  • One Firm
  • People Consciousness
  • Environmental Consciousness
  • Innovation
  • Continuous Learning

Core Values – SCOPEIC

Stewardship – Ownership, and Responsibility. We are accountable for our actions

Client Centricity – Customer Satisfaction is our priority

One Firm – Diverse people and skills working in an integrated manner as one team with one voice

People Consciousness – Happy people producing results beyond expectations

Environmental Consciousness – We live green and support our clients and communities in their green initiatives

Innovation – Yesterday is past, but today is brand new; we seek ways to do things differently without compromising standards and quality

Continuous Learning – We love learning and are quick to unlearn what is outdated.

Helping businesses just like yours

For expert guidance and know-how you can trust SIAO
Browse SIAO

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


BOI House,
Plot 256, Zone A
Off Herbert Macaulay Way
Behind Unity Bank Building
Central Business District

Tel: +23492912462,
Tel: +23492912463


18b Olu Holloway Road,
(Former Temple Road),
Off Kingsway Road,

Tel- +2347015180258