Accounting Assistant

Engineering Consulting Services; York (York County); On-site; USD 38,000 - 54,000; Full time

Job summary

ECS Group of Companies is seeking an Accounting Assistant to provide accounting, project administration, and clerical support across project teams and managers. You will assist with billing, documentation, data entry, and administrative processes while ensuring timely, accurate task completion.

The role requires meticulous attention to detail, strong communication, and proficiency with Office tools. Applicants should value confidentiality and be able to work independently within team workflows.

Qualifications

• Minimum 1 year of related experience in accounting or admin support.
• High school diploma or equivalent; associates degree preferred.
• Valid driver’s license if driving for ECS subsidiaries.
• Strong organizational skills and ability to meet deadlines.
• Effective written and verbal communication with stakeholders.
• Proficiency with Microsoft Office and related applications.
• Ability to learn and use company software systems and databases.
• Ability to work independently while collaborating with the team.

Responsibilities

• Provide accounting and administrative support to project teams and managers.
• Assist with billing activities, invoicing, and reviewing documentation.
• Review timesheets and subcontractor invoices for accuracy and coding.
• Enter project charges and maintain electronic project records.
• Maintain project files and documentation per company standards.
• Communicate with clients, vendors, and external contacts on matters.
• Ensure tasks and deliverables are completed accurately and on time.
• Support office operations and general administrative duties.

Skills

Organizational skills

Multi-tasking

Communication

Confidentiality

Problem solving

Customer service

Data entry

Independent work

Education

High school diploma

Associates degree preferred

Tools

Microsoft Office Suite

Company software systems

Job description

Responsibilities

The Accounting Assistant provides accounting, project administration, and clerical support to project teams, project managers, department managers, and office personnel. This position assists with billing activities, project documentation, data entry, and administrative processes while ensuring the timely and accurate completion of assigned tasks. The Accounting Assistant contributes to efficient office operations by supporting financial, project, and administrative functions in accordance with company policies and procedures.

Responsibilities

• Provides accounting and administrative support to project teams, project managers, department managers, and office personnel
• Assists with project billing activities by printing, distributing, reviewing, and preparing billing documentation and draft invoices
• Reviews timesheets, subcontractor invoices, and supporting documentation for completeness, accuracy, and proper project coding
• Enters project charges and maintains electronic project documentation through scanning, uploading, and record management activities
• Maintains project files, records, and administrative documentation in accordance with company standards
• Responds to requests for project information, reports, research, and supporting documentation
• Communicates with clients, vendors, and other external contacts regarding administrative and project-related matters
• Ensures assigned tasks, documentation, and deliverables are completed accurately and within established deadlines
• Processes, formats, transmits, and distributes project and business documents in a timely manner
• Performs data entry, project registration, proposal administration, filing, document scanning, and records management activities
• Assists with the preparation, assembly, binding, formatting, and distribution of reports and project deliverables
• Supports office operations through mail distribution, telephone coverage, and general administrative assistance
• Provides backup support to other administrative personnel during absences, training, meetings, and other periods of limited coverage
• Maintains confidentiality of company, project, employee, and client information
• Assists with continuous improvement of administrative processes and workflow efficiency
• Performs other duties as assigned

Qualifications

Required Qualifications

• 1 year of related experience
• High school diploma or equivalent; associates degree preferred
• If driving for, or on behalf of, any ECS subsidiary, a valid driver’s license is required
• Working knowledge of general office administration, clerical practices, and business procedures
• Ability to accurately process, organize, and maintain project and financial documentation
• Strong organizational skills with the ability to manage multiple priorities and meet deadlines
• Strong attention to detail and commitment to accuracy
• Effective written and verbal communication skills
• Ability to interact professionally with employees, clients, vendors, and other stakeholders
• Proficiency with Microsoft Office Suite, including Word, Excel, Outlook, and related business applications
• Ability to learn and utilize company software systems and databases
• Ability to work independently while collaborating effectively with team members
• Ability to maintain confidentiality and handle sensitive information appropriately
• Strong customer service and interpersonal skills
• Ability to identify issues, solve routine problems, and elevate concerns when appropriate

Military Qualifications

• The following US Military ranks would qualify for this position:
• E-4

About Us

ECS Group of Companies (ECS) was founded in 1988 with the goal to raise the standards of professional engineering consulting. Today, we are a leader in geotechnical, construction materials, environmental and building science + infrastructure consulting services. We are employee-owned with more than 3,200 employees in 125 offices and testing facilities coast to coast. ECS is currently ranked #60 in Engineering News-Record’s Top 500 Design Firms (April 2026), #148 in Engineering News-Record’s Top 200 Environmental Firms (October 2025) and #38 in Zweig Group’s Hot Firm List (June 2026). For additional information about ECS, visit: www.ecslimited.com.

ECS Group of Companies (ECS) was founded in 1988 with the goal to raise the standards of professional engineering consulting. Today, we are a leader in geotechnical, construction materials, environmental and building science + infrastructure consulting services. We are employee-owned with more than 3,200 employees in 125 offices and testing facilities coast to coast. ECS is currently ranked #60 in Engineering News-Record’s Top 500 Design Firms (April 2026), #148 in Engineering News-Record’s Top 200 Environmental Firms (October 2025) and #38 in Zweig Group’s Hot Firm List (June 2026). For additional information about ECS, visit: www.ecslimited.com.

Required Qualifications

• 1 year of related experience
• High school diploma or equivalent; associates degree preferred
• If driving for, or on behalf of, any ECS subsidiary, a valid driver’s license is required
• Working knowledge of general office administration, clerical practices, and business procedures
• Ability to accurately process, organize, and maintain project and financial documentation
• Strong organizational skills with the ability to manage multiple priorities and meet deadlines
• Strong attention to detail and commitment to accuracy
• Effective written and verbal communication skills
• Ability to interact professionally with employees, clients, vendors, and other stakeholders
• Proficiency with Microsoft Office Suite, including Word, Excel, Outlook, and related business applications
• Ability to learn and utilize company software systems and databases
• Ability to work independently while collaborating effectively with team members
• Ability to maintain confidentiality and handle sensitive information appropriately
• Strong customer service and interpersonal skills
• Ability to identify issues, solve routine problems, and elevate concerns when appropriate

Military Qualifications

• The following US Military ranks would qualify for this position:
• E-4