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Staff Accountant - Projects & Billing

Mission Critical Group · West Chester, Pennsylvania, United States · Posted May 19, 2026

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The Staff Accountant primarily supports the project and cost accounting functions with billings, cash applications, and accounts receivable supporting activities, but will also support general accounting functions, including preparing journal entries, performing account reconciliations, and assisting with the month-end close process to ensure accurate financial reporting in accordance with GAAP and company policies. This role directly supports milestone billing, payment application, and customer account maintenance while assisting with the resolution of discrepancies and aging balances.

Responsibilities:

Prepare routine and adjusting journal entries with appropriate supporting documentation

Assist with monthly, quarterly and year end close

Reconcile balance sheet accounts and investigate variances

Prepare and issue customer invoices based on approved milestones and billing instructions

Process and review inventory transfers to and from projects in accordance with project accounting policies

Track issued invoices and maintain billing documentation

Support weekly milestone billing reporting and follow up on missing or delayed billing inputs

Review daily bank activity to identify customer payments

Apply customer payments based on remittance information

Identify and escalate unapplied cash or discrepancies

Monitor AR aging and assist with collection follow-up

Investigate customer payment discrepancies and coordinate resolution

Assist with managing unapplied credits and balances

Maintain customer records in the accounting system, including: Customer master data

Tax exemption certificates (TECs)

Reasonable accommodation may be made to enable individuals with disabilities to perform these essential functions.

Bachelor’s degree in Accounting, Finance, or related field required (or equivalent combination of education and experience)

1–3+ years of accounting experience, preferably in billing, accounts receivable, or project accounting

Experience participating in month-end close preferred

Proficiency in Microsoft Excel (basic formulas, lookups preferred)

Experience with ERP or accounting systems

Experience in a manufacturing, construction, or project-based environment preferred

Working knowledge of GAAP fundamentals

Satisfactory completion of additional background screening.

Required Skill/Abilities

Strong attention to detail and accuracy

Strong organizational and documentation skills

Ability to manage multiple deadlines in a fast-paced environment

Analytical and problem-solving skills

Ability to communicate professionally with internal teams and customers

Ability to escalate issues appropriately

Ability to maintain confidentiality and exercise sound judgment

Ability to work independently while collaborating with the accounting team

Work Environment and Physical Demands

The work environment is a typical office environment, with quiet to moderate noise level, and traditional lighting.

Prolonged periods of sitting at a desk and operating a computer.

Must be able to communicate effectively using phones or computer software.

Must be able to lift up to 15 pounds at times.

Must be able to access and navigate each department at the assigned facilities.

Must be able to travel between MCG locations as needed, some travel could require overnight stays.

A Note to our Recruitment Partners: We really appreciate the interest, but MCG currently manages hiring through our internal team. We love getting to know our candidates directly! Because of this, we don’t accept unsolicited resumes from agencies at this time. If we ever need an extra hand, we’ll be sure to reach out to the community. Thanks for understanding!

MCG is an equal opportunity employer prohibiting discrimination based on race, color, creed, religion, sex, marital status, physical or mental disability, and any other protected classes stated by applicable federal and state laws. MCG is committed to providing equal employment opportunities to qualified individuals with disabilities and to act in accordance with regulations and guidance issued by the Equal Employment Opportunity Commission (EEOC).

Mission Critical Group (MCG) is an end-to-end power solutions and services provider that accelerates time-to-power and delivers scalable, resilient infrastructure for mission critical environments. By integrating engineering, manufacturing, modular deployment, and lifecycle services under one platform, we streamline execution and bring complex projects online faster - without compromising performance. With more than 1.5 million square feet of U.S. manufacturing capacity, MCG supports data centers, power generation, healthcare, oil & gas, pharmaceuticals, semiconductors, and industrial facilities where uptime is non-negotiable. Mission Critical Group designs, manufactures and provides value-added services for customers requiring critical power solutions. Powering a new electric world for a brighter, more secure future.

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