Manager, US Benefits & Retirement

Senior Benefits Analyst/Admin

Join our team as a Senior Benefits Analyst/Admin in a US office location (NJ, MD, NH, TX, CA, or OR) to drive critical benefit transformation projects, vendor integrations, and open enrollment across our US operations. This is a high-impact opportunity to shape key employee programs during an exciting period of organizational growth and change.

This is an office‑first role. Working together in person supports close, real‑time collaboration and team alignment, enabling us to deliver our best work. You will work primarily in the office, with the flexibility to work remotely for 20% of your time (one day per week).

What you will get:

• An agile career and dynamic working culture.

• An inclusive and ethical workplace.

• Competitive hourly rate.

• Compensation for this role will be determined by the candidate’s qualifications, skills, experience, and relevant knowledge.

What you will do:

• Provide hands-on, end-to-end management of complex US benefit workstreams arising from business transformations, organizational changes, and workforce transitions (such as mergers, acquisitions, and divestitures).

• Partner closely with cross-functional stakeholders including Total Rewards, HR Operations, Payroll, Legal, and project teams, as well as external brokers and advisors.

• Manage relationships and daily operations across 25+ benefit vendors covering health, insurance claims, EAP/EAS programs, and retirement/401(k) plans.

• Lead key annual initiatives, including Open Enrollment, vendor implementations, data validation, and 401(k) transition activities.

• Develop clear and engaging employee benefit communications and prepare concise status updates, risk assessments, and decision logs for leadership.

• Drive project plans, dependencies, and key deliverables independently, taking ownership of outcomes while appropriately escalating complex issues.

• Offer flexible hands-on support across the broader US benefits portfolio as operational priorities require.

What we are looking for:

• Significant experience in senior-level US HR Benefits administration, project management, and corporate transaction support (e.g., M&A/divestitures).

• Hands-on experience working with enterprise-level Human Capital Management (HCM) systems; experience with Workday HCM is highly preferred.

• Proven background managing complex multi-vendor ecosystems (25+ vendors), retirement/401(k) implementations, and annual Open Enrollment processes.

• Strong organizational and project management skills with the ability to independently manage project plans, identify risks, and drive key deliverables to completion.

• Excellent cross-functional collaboration and stakeholder management skills across HR, Payroll, Legal, and external brokers.

• Exceptional written and verbal communication skills with the ability to craft clear employee benefits copy and present concise updates to leadership.

• Ability to work comfortably during US Eastern Standard Time (EST) business hours to collaborate seamlessly with East Coast and European teams.

About Lonza

At Lonza, their people are their greatest strength. With 30+ sites across five continents, their globally connected teams work together every day to manufacture the medicines of tomorrow. Their core values of Collaboration, Accountability, Excellence, Passion and Integrity reflect who they are and how they work together. Everyone’s ideas, big or small, have the potential to improve millions of lives, and that’s the kind of work they want you to be part of.

Innovation thrives when people from all backgrounds bring their unique perspectives to the table. At Lonza, they value diversity and are committed to creating an inclusive environment.

As Lonza’s talent acquisition partner, please note, Randstad is responsible for the engagement and contracting of this contingent role.

Ready to play your part in shaping the future of life sciences? Apply now.