Part-Time Senior Controller — Growth & Mentorship

Renaissance Technologies, Inc.; Murrieta (CA); On-site; USD 112,000 - 177,000; Part time

Job summary

Renaissance Technologies, Inc. in Murrieta, CA is seeking a detail-driven Senior Controller to manage reporting, forecasting, and DCF analysis for a fast-growing operation. This part-time role leverages seven years of finance experience to shape the company’s numbers with rigor and clarity.

You will partner with department heads across the region to keep budgets honest, audit expenses, and turn sprawling data into auditable workbooks while delivering practical, mentor-driven growth opportunities.

Qualifications

• 5 or more years steering finance projects end to end.
• Hands-on command of Accounts Receivable, with Presentation Skills as a close second.
• 5+ years mentoring in a finance setting.
• A writer's ear for tone in high-stakes emails.
• Strong rapport-building skills and a genuinely positive presence.
• Humility to revise strong opinions when the data argues back.
• Clear thinking under the kind of pressure Murrieta, CA deadlines bring.

Responsibilities

• Audit travel and entertainment spend without becoming the bad guy.
• Identify cost-saving opportunities through detailed spend analysis.
• Keep the CA unemployment and withholding accounts perfectly square.
• Turn a sprawling spreadsheet into a controlled, auditable workbook.
• Partner with department heads across Murrieta, CA to keep budgets honest.
• Administer the company expense policy and audit reimbursement claims.
• Reconcile the credit-card feed against receipts nobody wants to chase.

Skills

Finance leadership

Accounts Receivable

Mentoring

Presentation skills

Business writing

Relationship building

Open-mindedness

Job description

Renaissance Technologies, Inc. in Murrieta, CA is seeking a detail-driven Senior Controller to manage reporting, forecasting, and DCF analysis for a fast-growing operation. This part-time role leverages seven years of finance experience to shape the company’s numbers with rigor and clarity.

You will partner with department heads across the region to keep budgets honest, audit expenses, and turn sprawling data into auditable workbooks while delivering practical, mentor-driven growth opportunities.