Subconsultant Relations Administrator - Gateway

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets.

We are more than 36,000 people, in over 70 countries, dedicated to improving quality of life. Everyone has an important role to play. With the power of many curious minds, together we can solve the world’s most complex challenges and deliver more impact together.

Role Description:

Arcadis is seeking a highly skilled and motivated Subconsultant Relations Administrator to support one of the most iconic and consequential infrastructure initiatives in the United States — the Gateway Hudson Tunnel Project (HTP). In this role you will serve as the primary point of contact between the organization and its subconsultants. This role ensures effective communication, coordination, and compliance across all phases of project engagement. The administrator fosters strong partnerships, resolves issues, and supports strategic collaboration to ensure project success and alignment with organizational goals.

We are working in partnership with Parsons and Mace as part of the MPA Delivery Partner team, selected by the Gateway Development Commission to deliver this transformative project. The HTP is a critical component of the broader Gateway Program — one of the most ambitious and impactful transportation initiatives in the nation — and is designed to strengthen mobility, enhance resiliency, and ensure the long-term reliability of the Northeast Corridor.

The project encompasses the construction of a new, two-track rail tunnel beneath the Hudson River, along with the full rehabilitation of the existing 113-year-old North River Tunnel. This vital infrastructure supports more than 200,000 daily passengers via Amtrak and NJ TRANSIT and serves as a backbone for economic activity and connectivity between New York and New Jersey.

This is more than just a job — it’s a once-in-a-generation opportunity to contribute to a nationally significant infrastructure program that will reshape rail transportation, drive sustainable economic growth, and improve regional accessibility for millions. As part of this high-performing, multidisciplinary team, you will help deliver excellence on one of the most technically complex and high-profile projects in the world.

If you're seeking to make a meaningful, lasting impact — while advancing your career alongside some of the best minds in the industry — this is your moment.

Role Accountabilities:

Relationship Management

• Establish and maintain productive relationships with subconsultants across disciplines.
• Serve as the central communication hub for contract negotiations, project updates, and issue resolution 
• Facilitate onboarding and orientation for new subconsultants, ensuring alignment with company standards and expectations 

Project Coordination

• Coordinate schedules, deliverables, and milestones between internal teams and subconsultants 
• Monitor subconsultant performance and provide feedback or support as needed.
• Ensure timely submission of reports, invoices, and documentation from subconsultants.

Compliance & Documentation

• Ensure subconsultants meet contractual, legal, and regulatory requirements.
• Maintain accurate records of contracts, certifications, insurance, and communications 
• Assist in the development and implementation of procedures to improve collaboration and efficiency 

Strategic Collaboration

• Identify opportunities for deeper collaboration and long-term partnerships.
• Support the restoration or renewal of previously successful subconsultant relationships 
• Report on the effectiveness of current partnerships and recommend improvements.

Reporting & Analysis

• Track and report on subconsultant engagement metrics, performance, and satisfaction.
• Analyze trends to improve collaboration strategies and optimize resource allocation.
• Prepare reports and presentations for leadership on subconsultant relations and outcomes.

Required Qualifications: 

• Bachelor’s degree in Business or Public Administration, Communications, Project Management, or a related field.
• 5+ years in consultant/vendor management, project coordination, or liaison roles.

Key Skills and Abilities: 

• Excellent verbal and written communication
• Strong organizational and multitasking abilities
• Proficiency in Microsoft Office and project management tools
• Ability to resolve conflicts and negotiate effectively
• Knowledge of industry-specific compliance and contracting stan