INTERNAL AUDIT CHARTER.PDF

Maricopa County — Formal (2022-06-22)

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Charter of the Maricopa County Internal Audit Department 
 
Introduction 
Internal auditing is an independent, objective assurance and consulting activity 
designed to add value and improve the operation of Maricopa County Government 
(County).  It helps the County accomplish its objectives by bringing a systematic, 
disciplined approach to evaluate and improve the effectiveness of risk management, 
control, and governance processes. 
Assurance services involve the objective assessment of evidence to provide an 
independent opinion or conclusions regarding an entity, operation, function, process, or 
system. 
Consulting services are advisory in nature, and are generally performed at the specific 
request of an engagement client.  The nature and scope of the consulting engagement 
are subject to agreement with the engagement client. 
 
Role 
The Maricopa County Internal Audit Department (Internal Audit) is established by the 
Maricopa County Board of Supervisors (Board) by the powers granted to the Board in 
A.R.S. § 11-251.  Internal Audit’s responsibilities are defined by the Board as part of its 
oversight role. 
 
Professionalism 
Internal Audit will be governed by adherence to The Institute of Internal Auditors' 
mandatory guidance including the Core Principles, the Definition of Internal Auditing, the 
Code of Ethics, and the International Standards for the Professional Practice of Internal 
Auditing.  This guidance sets forth required, fundamental principles for the professional 
practice of internal auditing and for evaluating the effectiveness of Internal Audit’s 
performance. 
 
Authority 
Internal Audit, with strict accountability for confidentiality and safeguarding records and 
information, is authorized full, free, and unrestricted access to any and all of the 
County’s records, physical properties, and personnel pertinent to carrying out any 
engagement.  By law, Internal Audit’s working papers and audit files are confidential 
(A.R.S. § 11-251 10).  All employees are requested to assist Internal Audit in fulfilling its 
roles and responsibilities.  Internal Audit will also have free and unrestricted access to 
the Board. 
 
Organization 
The Internal Audit Director (Director) will report functionally and administratively to the 
Board.  The Director will communicate and interact directly with the Board.  The Board 
will approve: (1) the Internal Audit charter, (2) the risk-based Internal Audit plan, (3) the 
Internal Audit budget, (4) decisions regarding the appointment and removal of the 
Director, and (5) the remuneration of the Director.

Independence and Objectivity 
Internal Audit will remain free from interference by any element in the County, including 
matters of audit selection, scope, procedures, frequency, timing, or report content to 
permit maintenance of a necessary independent and objective mental attitude.  
 
Internal auditors will have no direct operational responsibility or authority over any of the 
activities audited.  Accordingly, they will not implement internal controls, develop 
procedures, install systems, prepare records, or engage in any other activity that may 
impair their judgment. 
 
Internal auditors will exhibit the highest level of professional objectivity in gathering, 
evaluating, and communicating information about the activity or process being 
examined.  Internal auditors will make a balanced assessment of all the relevant 
circumstances and not be unduly influenced by their own interests or by others in 
forming judgments. 
 
The Director will confirm to the Board, at least annually, the organizational 
independence of Internal Audit. 
 
Responsibility 
The scope of Internal Audit encompasses, but is not limited to, the examination and 
evaluation of the adequacy and effectiveness of the County’s governance, risk 
management, and internal controls, as well as the quality of performance in carrying out 
assigned responsibilities to achieve the County’s stated goals and objectives.  
 
Internal Audit Plan 
At least annually, the Director will submit to the Board an audit plan for review and 
approval.  The Internal Audit plan will be developed based on a prioritization of the audit 
universe using a risk-based methodology, including input of senior management and the 
Board.   
 
Reporting and Monitoring 
A written report will be prepared and issued by the Director or designee following the 
conclusion of each Internal Audit engagement and will be distributed to the Board and 
others as appropriate.  The Internal Audit report may include a response and corrective 
action taken or to be taken in regard to the specific findings and recommendations.  
Internal Audit will be responsible for appropriate follow-up on engagement findings and 
recommendations. 
 
Quality Assurance and Improvement Program 
Internal Audit will maintain a quality assurance and improvement program that covers all 
aspects of the County’s internal audit activity.  The Director will communicate to the 
Board on Internal Audit’s quality assurance and improvement program, including results 
of ongoing internal assessments conducted at least annually and external assessments 
conducted at least every five years.