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Accounts Payable Specialist

91016, Monrovia
Start date
Jul 14, 2022

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Administration, Accounting
Required Education
Bachelors Degree
Position Type
Full time
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Xencor is an innovative, clinical-stage biopharmaceutical company located in the Los Angeles area—near Pasadena—and in San Diego. We use our pioneering XmAb® technology to discover and develop better biotherapeutics, antibodies and cytokines with improved function, with the goal of improving patient outcomes and quality of life. We have an excellent opportunity for an Accounts Payable Specialist to join our team Monrovia.


This position will be a hybrid role – 3 days (work from home) when we return to office (currently fully remote).


Our protein engineering capabilities and the modular nature of our XmAb technology allow us to quickly identify and create new platforms and drug candidates for potential development. We are advancing a deep clinical pipeline of novel drug candidates, including eight bispecific antibodies and two engineered cytokines, and more programs are expected to start clinical testing in 2022. We also leverage our many XmAb technologies by collaborating with leading global biopharmaceutical companies, including Genentech and Janssen Biotech, among others, and including our partnerships, 20 XmAb drug candidates are advancing through clinical development. Three XmAb medicines, to treat patients with a range of serious illnesses, such as aggressive lymphoma, rare blood disorders and COVID-19, are now marketed worldwide by partners.


Our employees are the most important factor in our success, and we have assembled a highly talented group from diverse backgrounds and disciplines to execute our business plan and shape our future. Xencor employees’ value new ideas and flexibility and demand from each other scientific rigor, a passion for innovation, and a willingness to take risks.

Position Summary:

Responsible for the daily processing and recording of accounts payable transactions to ensure payment obligations are processed, verified and reconciled in an effective, timely, and accurate manner.

Primary Responsibilities:

  • Enters invoices and vouchers into the accounting system for payment processing in a timely manner
  • Reconciles all invoices with purchase orders, receiving documents, packing slips, etc., ensuring all invoices represent authorized, legitimate purchases
  • Accurately codes and records expenses to the correct charge code/general ledger accounts; obtains appropriate department head approvals
  • Reconciles the accounts payable ledger to ensure that all bills and payments are accounted for and properly posted
  • Verifies and investigates discrepancies, if any, by reconciling vendor accounts and monthly vendor statements
  • Facilitates payment of invoices due by sending bill reminders and contacting clients as needed
  • Maintains up-to-date vendor contacts including W-9’s and files/scans all documents
  • Researches and resolves vendor questions and issues such as billing and invoice discrepancies
  • Serves as a back-up resource for monthly and quarterly duties
  • Adheres to all department and company-wide policies regarding conduct, performance and procedures
  • Processes employee expense reimbursement requests
  • Performs other duties as assigned.


Position minimally requires an Associate Degree in Business or Accounting and 3 years of related experience.  A Bachelor’s degree in Accounting, Finance, Business Administration or a related field, plus at least 2 years of related experience is preferred. Previous Accounts Payable experience in a publicly held company is also preferred.  


The company reserves the right to consider internal experience in lieu of the education or experience requirements listed above.


Position also requires:

  • Understanding of basic bookkeeping and accounting payable principles
  • Advanced Microsoft Excel skills
  • Excellent verbal, written, communication and interpersonal skills
  • Working knowledge of NetSuite ERP and Concur systems
  • Attention to detail and accuracy
  • Ability to multi-task, work under pressure and meet required deadlines
  • Professionalism in dealing with both internal and external contacts
  • Strong team orientation with ability to interact with all levels of staff in the company


Physical, Mental and Environment Demands:

The physical, mental and working environment demands described are representative of those that must be met by an employee to successfully perform the primary functions of this position.


The physical demands of the office are normally associated with extended amounts of time sitting and using office equipment, including a computer, keyboard and mouse, which can cause muscle strain. While performing the duties of this job, the employee is frequently required to stand, walk and sit. Periodic light lifting of supplies and materials may apply.


Specific mental demands for the position are listed above under requirements.  In addition, mental demands for this position include:

  • Ability to multitask without loss of efficiency or accuracy, including the ability to perform multiple duties from multiple sources.
  • Ability to work and sustain attention with distractions and/or interruptions.
  • Ability to interact appropriately with a variety of individuals including vendors, customers and clients.
  • Ability to maintain regular attendance and be punctual.
  • Ability to understand, remember and follow verbal and written instructions.

Xencor requires all employees to be fully vaccinated against COVID-19 as a condition of employment.  Being fully vaccinated means that at least two weeks have passed since an individual’s final dose of an authorized COVID-19 vaccine regimen, including any boosters recommended by the CDC.  New employees will be required to provide proof of their fully COVID-19 vaccinated status as of their start date unless an exemption or accommodation is approved. 


Americans with Disabilities Act (ADA) Statement

The Company will provide reasonable accommodations (such as a qualified sign language interpreter or other personal assistance) with the application process upon your request as required to comply with applicable laws. If you have a disability and require assistance in this application process, please contact


To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. Reasonable Accommodations may be made to enable qualified individuals with disabilities to perform the essential functions.


Equal Employment Opportunity (EEO) Statement

The Company is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to age, race, color, religion, sex, sexual orientation, gender or gender identity, national origin, disability status, protected veteran status or any other characteristic protected by state or federal law.


Xencor does not accept profiles or resumes from recruiting vendors without a binding written agreement. Any unsolicited submission of services and or resumes in no way creates an obligation or duty by Xencor, implied or otherwise.

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