The Texas Constitution, Article XVI, Section 44, Local Government Code of the State of Texas, provide for a County Treasurer and prescribe the duties as chief custodian of county finance. 

Basic duties include, but are not limited to, receiving, investing, keeping and accounting, paying, applying, and disbursing all monies belonging to the county from whatever source derived, according to Law. The county treasurer preserves the system of checks and balances within the financial administration of county finances. 

Specific duties include:

• Banker for Martin County government - Working with departments and public for receiving and disbursing funds, including general payments of county expenses, payments for jury duty, and payments to election workers and county payroll.
• Investment officer for Martin County funds - Working with external brokers and banking community for highest and safest investment returns on Martin County funds; ensuring proper collateral for all Martin County investments and funds; and proposes and oversees the Martin County Investment Policy, in compliance with the Public Funds Investment Act of Texas.
• Contract Administrator for the Martin County Bank Depository - Including negotiating of Contract and management of all facets of banking services for Martin County.
• Agent - For required monthly, quarterly, or annual federal and/or State of Texas reports and payments for Martin County.
• Reconciliation Agent - For Martin County accounting, working with the depository bank, county departments, and external auditors.
• Statutory Supervisor - Of unclaimed property for Martin County, valued at less than $100 (Search the Texas State Comptroller website for unclaimed funds.)