Payroll & General Ledger Sr. Accountant

About Mattson

• Company: Mattson Technology, Inc., a 38-year Silicon Valley company, designs,
• manufactures, markets, and globally supports plasma and rapid thermal processing
• equipment to fabricate integrated circuits for the global semiconductor
• industry.

• Mattson Technology, Inc. offers processing equipment that utilizes innovative
• technologies to deliver advanced processing capabilities and high productivity
• for the fabrication of current and next-generation integrated circuits. Our
• equipment and technologies are used by leading memory and logic, analog /power
• device manufacturers worldwide. Innovations from Mattson Technology in Atomic
• Surface Engineering address the most critical logic and memory manufacturing
• challenges.

• In May 2016, Mattson Technology was acquired by Beijing’s E-Town Capital. Our
• new investor’s vision is that Mattson Technology, with its Silicon Valley DNA,
• will continue to operate as a global, market-driven technology provider serving
• worldwide semiconductor manufacturing customers. In July, 2025, the company
• successfully listed in Shanghai’s STAR Exchange. As the external trade
• compliance environment evolves, Mattson Technology now operates independently
• from the parent company in product, business, and operations, serving customers
• outside of China.

Position Summary

• Mattson Technology, Inc. is seeking a Payroll & General Ledger Sr. Accountant to
• oversee U.S. payroll operations and key General Ledger activities. This position
• will oversee payroll for approximately 180 salaried and non-salaried employees
• while supporting journal entries, account reconciliations, month-end close,
• payroll accounting, and internal controls.

• The role requires hands-on experience with ADP, Oracle, and SAP and will serve
• as a key interface between Payroll, HR, Finance, and Accounting.

Key Responsibilities

• Payroll
• Full own the end-to-end U.S. payroll for approximately 180 employees,

including regular, supplemental, bonus, and special payrolls.

• Review hours, earnings, deductions, benefits, taxes, PTO, and other payroll

inputs.

• Perform pre- and post-payroll audits and resolve discrepancies.
• Coordinate with HR, Benefits, Finance, and Accounting to ensure accurate and

timely payroll.

• Maintain payroll procedures, documentation, controls, and process

improvements.

• Support federal, state, and local payroll tax compliance, including

multi-state withholding, unemployment, W-2/W-2C, filings, and deposits.

General Ledger & Payroll Accounting

• Prepare and review journal entries related to payroll, benefits, accruals,

prepaid expenses, taxes, and other accounts.

• Reconcile payroll registers, payroll liabilities, benefits, and payroll

expenses to the General Ledger.

• Prepare monthly balance sheet account reconciliations and investigate

outstanding items.

• Analyze payroll and accounting variances and support monthly, quarterly, and

year-end close.

• Maintain accurate documentation and provide support for internal and external

audits.

Systems & Process Improvement

• Serve as a key business owner/SME for ADP, Oracle, and SAP, including payroll

and accounting interfaces.

• Troubleshoot system and data issues with IT and external providers.
• Support system upgrades, implementations, testing, and process improvements.
• Identify opportunities to automate payroll, reconciliations, reporting, and

accounting processes.

Supervision & Controls

• Supervise and provide direction to a payroll processor in Malaysia, including

work priorities, deadlines, quality, and training.

• Maintain appropriate internal controls, segregation of duties, and audit-ready

documentation.

• Ensure compliance with company accounting policies and internal control

requirements.

Required Qualifications

• Bachelor’s degree in Accounting, Finance, Business, or related field.
• 5+ years of progressive accounting and payroll experience.
• Hands-on U.S. payroll experience supporting approximately 180+ employees.
• Strong General Ledger, account reconciliation, journal entry, and month-end

close experience.

• Hands-on experience with ADP, Oracle, and SAP.
• Knowledge of federal, state, and local payroll requirements, including

multi-state payroll.

• Strong Excel and analytical skills with excellent attention to detail.
• Ability to manage deadlines, resolve issues, and maintain confidential

employee information.

• Strong written and verbal communication skills.

Preferred Qualifications

• Experience in semiconductor, technology, manufacturing, or multinational

companies.

• SOX/internal control experience.
• Experience with ADP-to-Oracle payroll interfaces.
• Prior supervisory experience.
• U.S. GAAP and external audit experience.
• Experience improving or automating accounting and payroll processes.

Key Competencies

• Payroll & Accounting Expertise | ADP/Oracle/SAP Systems | General Ledger |
• Reconciliations | Internal Controls | Analytical Skills | Leadership | Process

Improvement | Communication

• Key Performance Measures
• Accurate and timely payroll processing.
• Accurate payroll accounting, reconciliations, and journal entries.
• Timely and effective month-end close support.
• Payroll tax and regulatory compliance.
• Resolution of payroll and accounting issues.
• Effective internal controls and audit support.
• Reliable ADP, Oracle, and SAP processes and interfaces.
• Continuous process improvement and automation.