Ionis Pharmaceuticals, Inc. · 3 days ago
Accounts Payable (AP) Specialist IV
Carlsbad, CA
Full-time
Hybrid
Senior Level
$25.26/hr - $33.72/hr
5+ years expIonis Pharmaceuticals, Inc. is headquartered in Carlsbad, California, pioneering in RNA-targeted medicines. The Accounts Payable Specialist IV will support the Accounts Payable department by ensuring accurate processing of invoices and resolving various AP issues.
BiotechnologyHealth CareMedicalPharmaceutical
Responsibilities
Daily invoice processing (3-way match and 2-way match) and handle complex processing, such as GMP invoices; partner with business teams to resolve issues
Assist in preparing weekly payment runs, ensuring timely processing
Monitor GR/IR (Received and Not Invoiced) reports and resolve discrepancies promptly
Reconcile vendor statements and monitor AP aging reports following up with suppliers on outstanding items
Work with suppliers on updating banking information when payments are rejected
Support system implementations and upgrades covering required testing scenarios
Audit employee expense reports weekly, ensuring compliance with T&E policy; work with employees to resolve audit issues
Monitor Concur unsubmitted expenses and follow up with employees as necessary
Assist employees with Concur inquiries, including credit card reconciliations
Ensure Desktop Procedures are current and provide training to new hires or team members
Assist with audits by providing necessary documentation in a timely manner
Run Excel reports and assist with ad hoc reporting requests
Assist with 1099 reconciliation and filing
Act as backup support for AP invoice processing when team members are unavailable or during workload increases
Qualification
Required
Associate's degree in Accounting, Finance, or a related field (or equivalent experience)
5+ years of experience in Accounts Payable or a similar accounting role
Strong understanding of AP processes and invoice processing
Proficiency with ERP systems (SAP and Coupa preferred). Proficiency in Concur System
Intermediate to advanced Microsoft Office (Excel)
Ability to work independently and manage time effectively. Flexibility when priorities shift
Strong organizational skills with attention to detail and accuracy
Effective communication and interpersonal skills to work with internal teams and vendors
Critical thinking and process improvement mindset
Excellent customer service skills
Preferred
Experience with AP 3-way matching and exception handling, such as price/quantity variances
Experience with SAP is highly preferred, particularly with upcoming SAP implementation
Concur and T&E experience
Benefits
Excellent benefits package
Company
Ionis Pharmaceuticals, Inc.
For three decades, Ionis has invented medicines that bring better futures to people with serious diseases.
501-1000 employees
Funding
Current Stage
Public CompanyTotal Funding
$2.45B2025-11-13Post Ipo Debt· $700M
2024-09-09Post Ipo Equity· $500.3M
2023-06-06Post Ipo Debt· $500M
Leadership Team
Brett P. Monia
Chief Executive Officer
Eric Bastings
Senior Vice President, Development Strategy
Recent News
Labiotech UG
2026-01-22
Business Wire
2026-01-22
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