Senior Accounts Payable Manager & Systems Architect

Security Industry Specialists; Seattle (WA); On-site; USD 99,000 - 121,000; Full time

Benefits offered by this job

Health, Dental, Vision

401k

Paid Time Off

Job summary

Security Industry Specialists is seeking an Accounts Payable Manager in Seattle, WA, to provide strategic leadership and scale the global AP function. This executive role drives operational transformation, integrates enterprise systems, and ensures precise vendor and subcontractor billing with strong internal controls.

You will lead an AP team, oversee payments, onboarding, and compliance, and collaborate with operations to resolve disputes, ensuring accurate, timely invoicing and audit-ready

Qualifications

• Bachelor’s degree in Accounting, Finance, or a related field required.
• 7+ years of progressive, full-cycle Accounts Payable and subcontractor invoicing experience, with 2–3+ years in a direct supervisory or management capacity.
• Expert-level mastery of Excel, proficiency with Google Sheets, Data loaders, Templates, Macros, Scripts, Data Loaders, and AI tools highly desired.
• Advanced proficiency and administrative-level understanding of Sage Intacct and Salesforce highly preferred.
• Demonstrated success managing high-volume subcontractor operations, complex vendor contracts, and joint AP/Billing revenue workflows.
• Superior communication skills with a proven track record of translating complex financial metrics and system requirements into actionable insights for non-finance staff and executives alike.
• A self-starter who thrives in ambiguous environments, diagnose systemic data irregularities, identify root causes, and implement automated preventative measures.

Responsibilities

• Oversee the end-to-end, full-cycle Accounts Payable process for the organization. Direct verification, coding, and scheduling of ACH, wire, and check payments.
• Ensure validation and alignment with contracts, rate sheets, and scope-of-work agreements.
• Oversee the vendor onboarding framework, tax documentation (W-9s/W-8s, 1099 reporting), and regulatory compliance.
• Mentor, manage, and scale a high-performing AP team, fostering a culture of precision, accountability, and continuous professional growth.
• Lead end-to-end management of all subcontractor billing. Oversee the accurate, timely validation and delivery of subcontractor bills to the Billing Team to guarantee seamlessly aligned customer invoicing and zero leakages in billable revenue.
• Serve as the strategic bridge between Accounts Payable and Billing team. Partner directly with operations managers and vendors to resolve subcontractor disputes, unbilled services, or missing performance artifacts prior to payment release.
• Continuously evaluate and optimize AP workflows to eliminate operational bottlenecks and improve processing efficiency. Design, implement, and maintain robust Standard Operating Procedures (SOPs). Lead system integration projects across Sage, Salesforce, and enterprise databases
• Assess, design, and implement internal controls across the payment cycle, formalizing safeguards in areas where controls are not yet established. Strengthen approval, authorization, and segregation-of-duties practices that protect against duplicate, unauthorized, and fraudulent payments, and own AP control documentation and support for internal and external audit.

Skills

Leadership

Analytical mindset

Executive communication

Education

Bachelor’s degree in Accounting/Finance

Tools

Sage Intacct

Salesforce

Excel

Job description

Security Industry Specialists is seeking an Accounts Payable Manager in Seattle, WA, to provide strategic leadership and scale the global AP function. This executive role drives operational transformation, integrates enterprise systems, and ensures precise vendor and subcontractor billing with strong internal controls.

You will lead an AP team, oversee payments, onboarding, and compliance, and collaborate with operations to resolve disputes, ensuring accurate, timely invoicing and audit-ready