[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Prosperity Bancshares jobs](https://jobs.opennash.com/companies/prosperity-bancshares/) · [Search jobs](/search/) Prosperity Bancshares · RIVER OAKS, Houston, TX, US # Trust Administrative Assistant (Full Time) - Houston, River Oaks RIVER OAKS, Houston, TX, US Full-time Administrative Listed on Prosperity Bancshares’s official careers site. Posted September 20, 2026. Check that it is still open and apply there. [Apply on Prosperity Bancshares’s careers site →](https://workforcenow.adp.com/mascsr/default/mdf/recruitment/recruitment.html?cid=009d7dae-06f5-4976-bb97-c97601e32efe&ccId=19000101_000001&jobId=603172&lang=en_US) [OpenNash Jobs](https://jobs.opennash.com/) / [Prosperity Bancshares](https://jobs.opennash.com/companies/prosperity-bancshares/) / Trust Administrative Assistant (Full Time) - Houston, River Oaks ## Job description ### External Applicants Please apply through Prosperity Bank's Career Center at [https://www.prosperitybankusa.com/Careers](https://www.prosperitybankusa.com/Careers). Applying through any other source may prevent Prosperity from receiving your application. ### Internal Applicants If you are a current associate of Prosperity Bank, please apply through the internal Talent - Career Center in ADP. ### POSITION PURPOSE Responsible for a variety of department operational duties and support functions in the Trust Department. Assist Trust Officers with various duties related to their client relationships and clerical related functions. ### ESSENTIAL FUNCTIONS AND ### BASIC DUTIES Assumes responsibility for the effective performance of all assigned operational and support functions. Opens and sorts all incoming mail. Retrieves and distributes intra-office mail. Prepares mail for office couriers. Maintains account administrative files. Sorts, copies, and distributes reports, documents, and files. Clerical type duties such as setting up new accounts on the computer systems, typing, answering phones, and serving as a receptionist for the Trust Department. All other duties as assigned. Assumes responsibility for establishing and maintaining effective communications and coordination with area staff and management. Assists and backs up staff as needed. Keeps management informed of area activities and of any significant problems. Represent the Bank in a courteous and professional manner. Assumes responsibility for related duties as required or assigned. Assist with special projects as assigned. Ensure that work area is clean, secure, and well maintained. Advanced Customer service skills, self-starter. Must be able to read and understand legal documents, i.e. trust instruments, wills, etc. Detail oriented with accuracy required in all tasks. Able to work with multiple employees. High level of confidentiality required. Able to prioritize and perform several tasks at one time. Excellent oral and written communication skills. Maintain integrity of account information. The above statements describe the general nature and level of work only. They are not an exhaustive list of all required responsibilities, duties, and skills. Other duties may be added, or this job description amended at any time. ### SUPERVISORY RESPONSIBILITIES This role has no supervisory responsibilities. ### QUALIFICATIONS EDUCATION/CERTIFICATION: High school diploma or equivalent; degree or equivalent certification is desired. ### REQUIRED KNOWLEDGE Knowledge of basic office structure and information flow Knowledge of Windows XP Strong Word and Excel skills needed Able to master new computer programs and systems Accurate typing skills - minimum 40 wpm ### EXPERIENCE REQUIRED: 3+ years clerical experience or equivalent higher level education SKILLS/ABILITIES: Well organized Good interpersonal and public relations skills Cooperative and willing to assist others PHYSICAL ACTIVITIES AND ### REQUIREMENTS OF THIS POSITION Talking: Especially where one must frequently convey detailed or important instructions or ideas accurately, loudly, or quickly. ### Average Hearing Able to hear average or normal conversations and receive ordinary information. ### Repetitive Motion Movements frequently and regularly required using the wrists, hands, and/or fingers. ### Average Visual Abilities Average, ordinary, visual acuity necessary to prepare or inspect documents or products or operate machinery. ### Physical Strength Sedentary work; sitting most of the time. Exerts up to 10 lbs. of force occasionally. (Almost all office jobs.) ### WORKING CONDITIONS None No hazardous or significantly unpleasant conditions (such as in a typical office). MENTAL ACTIVITIES AND ### REQUIREMENTS OF THIS POSITION Reasoning Ability: Ability to apply common sense understanding to carry out detailed but uninvolved instructions and to deal with problems involving a few variables. ### Mathematics Ability Ability to perform basic math skills, use decimals to compute ratios and percentages, and to draw and interpret graphs. ### Language Ability Ability to use passive vocabulary of 5,000-6,000 words; read at a slow rate; and define unfamiliar words in dictionaries for meaning, spelling, and pronunciation. Ability to write complex sentences, using proper punctuation, and using adjectives and adverbs. Ability to communicate in complex sentences, using normal word order with present and past tenses and good vocabulary. ### Hours Monday - Friday 8:00 AM - 5:00 PM. 40 hours per week. ## At a glance - Posted by the employer: Sep 20, 2026 - First seen by OpenNash: Oct 11, 2026 - Last checked: Oct 18, 2026 - Listed for: 28 days - Location: RIVER OAKS, Houston, TX, US - Employment type: Full-time[Apply on Prosperity Bancshares’s careers site →](https://workforcenow.adp.com/mascsr/default/mdf/recruitment/recruitment.html?cid=009d7dae-06f5-4976-bb97-c97601e32efe&ccId=19000101_000001&jobId=603172&lang=en_US) ## More jobs at Prosperity Bancshares ### [Senior Lending Assistant (Full Time) - Houston, River Oaks](https://jobs.opennash.com/companies/prosperity-bancshares/jobs/7ff2829cb2f0d4c88a91/) RIVER OAKS, Houston, TX, US ### [Personal Banker (Full Time) - Houston, River Oaks](https://jobs.opennash.com/companies/prosperity-bancshares/jobs/e7b7e807f64190860500/) RIVER OAKS, Houston, TX, US ### [Portfolio Manager (Full Time) - Houston, River Oaks](https://jobs.opennash.com/companies/prosperity-bancshares/jobs/bd4a897a60821226a9b8/) RIVER OAKS, Houston, TX, US ### [Lending Assistant (Full Time) - AB San Antonio, Concord](https://jobs.opennash.com/companies/prosperity-bancshares/jobs/34d5fb455065d06d9664/) San Antonio, TX, US ### [Lending Assistant (Full Time) - La Grange](https://jobs.opennash.com/companies/prosperity-bancshares/jobs/1a652d392f9c9308e29b/) La Grange, TX, US ## Similar jobs at other companies ### [Senior Administrative Assistant](https://jobs.opennash.com/companies/humana/jobs/e7b3bf6c796fa355426d/) Humana · Richardson, Texas ### [Administrative Assistant - N2](https://jobs.opennash.com/companies/lockheed-martin/jobs/9f810d4259b11f741581/) Lockheed Martin · Johnstown, PA ### [Administrative Assistant Specialist](https://jobs.opennash.com/companies/lockheed-martin/jobs/94a48476489af93e46d7/) Lockheed Martin · Camden, AR ### [Administrative Assistant](https://jobs.opennash.com/companies/eaton/jobs/044988ade152696b3c7d/) Eaton · Worcester, Massachusetts, USA ### [Executive Administrative Assistant](https://jobs.opennash.com/companies/huntington-bank/jobs/4ab7c2518b63ae684dbd/) Huntington Bank · Columbus, OH OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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