Business Unit Bookkeeper

Perimeter Security Partners (PSP) is seeking a detail-oriented and experienced Full-Charge Bookkeeper to manage the financial operations of a soon-to-be-acquired business located in Nassau County, Long Island, New York (North Shore) with annual revenues of $5–10 million.

This role is ideal for a highly motivated self-starter who excels in a hands-on, high-responsibility environment and enjoys working independently within a rapidly growing small business. The successful candidate will take full ownership of the company’s financial records and work closely with PSP’s Brentwood/Nashville-based Accounting and Finance team to ensure accuracy, compliance, and strategic financial support.

Key Responsibilities

• Maintain and manage all company financial records
• Record and oversee all journal entries
• Transition the accounting system from cash basis to accrual basis
• Implement job-level revenue recognition and cost accounting practices
• Support the transition of customer relationships from project-based to recurring service agreements
• Manage accounts payable and accounts receivable processes
• Assist with payroll processing
• Perform monthly bank and credit card reconciliations
• Track employee expenses and manage the reimbursement process for field technicians
• Complete monthly financial closings
• Prepare internal financial statements and schedules for consolidation into parent company financials
• Assist in preparing reports for senior management, lenders, and private equity partners
• Support audits and tax filings, coordinating with external accountants as needed
• Participate in the transition to Acumatica ERP, including learning the system and supporting a smooth migration from QuickBooks
• Manage company billing activities
• Prepare and submit monthly sales tax reports and payments

Qualifications

• Bachelor’s degree in accounting or related field
• CPA or progress toward CPA designation is a plus
• Minimum 5 years’ full-charge bookkeeping experience in a small to mid-sized company
• Proficiency with QuickBooks is required
• Strong Excel skills (advanced formula knowledge, data manipulation, reconciliation, financial reporting)
• Experience with job-level/project-based accounting
• Familiarity with revenue recognition principles, cost allocation and accrual accounting
• Willingness to learn and adapt to a new ERP system (Acumatica experience a plus)
• Excellent organizational, analytical, and communication skills

Benefits

• Full Time / Salary ($85,000 - 110,000, depending on experience, with performance-based and project driven bonus potential)
• Matching 401K (4%)
• Healthcare & Dental Insurance
• Eligibility for Profit Sharing Bonus

PSP provides a significant contribution toward premiums for medical, dental, vision and life insurance. The company offers a 401(k) plan with a company matching contribution, telephone allowance, paid time off, paid holidays.

Company Description

Perimeter Security Partners is a three-time Inc. 5000 listed rapidly growing company that designs, constructs, and maintains perimeter security systems for some of our country’s most critical government and private facilities, including: the U.S. Military, National Park Service, data centers, corporate headquarters, stadiums, utilities, and other critical infrastructure assets.

PSP is a nimble, dynamic, and growing company that offers extraordinary room for personal and professional growth as you learn the industry and demonstrate your initiative. We have a team-oriented, collegial culture fostering direct collaboration with the owners to ensure our projects are completed successfully and customers are satisfied.