Mariner

Associate, Tax Operations

Mariner

full-time

Posted on:

Location Type: Hybrid

Location: El Segundo • California • 🇺🇸 United States

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Job Level

JuniorMid-Level

About the role

  • The Associate, Tax Operations provides critical administrative and operational support to the tax team.
  • Gather tax documents, assemble deliverables, and maintain portals and electronic filing records.
  • Communicate with clients and assist with deliverables.
  • Process e-filings, manage rejections, and maintain audit documentation.
  • Coordinate estimated tax payments, confirm completion, and maintain payment records as assigned.
  • Draft invoices, track accounts receivable, and manage data in XCM.
  • Track return flow, support backlog monitoring, and manage task status in XCM and CCH Axcess.
  • Complete administrative tasks including client database management, file management, document management, and internal meeting coordination (engagement letters, tax organizers, tax mailings).

Requirements

  • Proficiency with Microsoft Office (Word, Excel, Outlook).
  • Familiarity with basic document handling, workflow coordination, or client service.
  • High school diploma or equivalent.
  • 1+ years of experience in administrative, tax, or financial operations.
  • Bachelor’s degree in Accounting, Finance, Business, or a related field.
  • Experience with tax workflow systems (XCM, CCH Axcess, Box, ShareFile).
  • Experience supporting tax professionals or working in a financial services environment.
  • Meticulous attention to detail and data accuracy; owns quality of work.
  • Manages time and deadlines independently; requires minimal oversight.
  • Clear, professional communicator—written and verbal; proactively seeks and shares information.
  • Customer-focused, maintains confidentiality, and follows through reliably.
  • Learns new technology quickly and adapts to changing systems and workflows.

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
tax document handlinge-filing processinginvoice draftingaccounts receivable trackingdata managementworkflow coordinationadministrative supporttax operationsattention to detailtime management
Soft skills
communicationcustomer focusconfidentialityreliabilityadaptabilityproactive information sharingindependent workmeticulousnessorganizational skillsteam support
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