Assistant Project Manager jobs in United States

Infinitesima was spun out of the University of Bristol in 2001 and has been developing innovative metrology solutions which improve speed and precision in the manufacture of semiconductors. The company’s technology combines the 3-dimensional surface detection capability of atomic force microscopy (AFM), with high-speed laser activation and the accuracy of interferometry. The Rapid Probe Microscope (RPM) is protected by an extensive patent portfolio. The company’s RPM technology is being used by leading semiconductor equipment companies globally.Location: Abingdon

Reporting to: PMO Director

As a Project Lead, you will lead complex, high-impact projects across the full lifecycle. You will drive cross-functional collaboration, ensure alignment with strategic objectives, and serve as a key point of coordination between engineering, operations, and senior stakeholders. There are two roles available, both requiring strong technical understanding and proven project leadership in a fast-paced, engineering focused environment.

Key Responsibilities:

• Lead the planning, execution, and delivery of complex technical projects ensuring alignment with business goals, timelines and resource constraints.
• Develop, maintain, and communicate comprehensive project plans, schedules, budgets, and risk registers.
• Act as the central point of accountability for assigned projects, ensuring clarity of objectives and effective stakeholder engagement.
• Identify and mitigate risks and issues proactively; escalate where necessary with clear context and recommendations.
• Coordinate cross-functional teams and resolve resource conflicts by working closely with department heads and functional leads.
• Mentor and support junior project managers and contribute to the development of project management best practices across the organisation.

Personal Qualities:

• Strong leadership and stakeholder management skills, with the ability to influence and collaborate at all levels of the organisation.
• Strategic thinker with a hands-on, delivery focused mindset.
• Professional, approachable, and adaptable under pressure.
• Strong decision making and problem solving skills, ability to navigate technical and organisational challenges.
• High level of initiative, energy, and ownership of outcomes.
• Excellent attention to detail, with a commitment to delivering quality results.

Education / Qualifications:

• Degree in Engineering, Physics, or a related technical discipline.
• Senior level project management certifications preferred (e.g. PRINCE2 Practitioner, MSP, APM Chartered Project Professional, PMI-PMP)
• A track record of successful delivery in complex technical programmes is essential.

Professional Skills & Abilities:

• Expertise in project and programme management methodologies (Agile, Waterfall, Hybrid).
• Strong planning, scheduling and budgeting capabilities.
• Advanced risk and change management skills.
• High proficiency in project management tool; advanced Microsoft Excel skills are advantageous.
• Experience managing complex technical projects in engineering, R&D, or manufacturing environments.

In addition to a competitive starting salary and a yearly bonus. Infinitesima offers flexible working hours, 25 days annual leave, personal pension contributions and EMI Share scheme.

Salary will be dependant on skills and experience for each role. Expected salary range is £55,000 - £75,000.

We are committed to building a diverse and inclusive workplace. We welcome applications from all backgrounds and actively encourage individuals from underrepresented groups to apply. Our strength lies in the varied perspectives that come from different cultures, experiences, and identities. We believe that true innovation is fuelled by collaboration—locally and globally—and strive to foster an environment where everyone can contribute meaningfully and thrive. If you require adjustments to take part in the recruitment process, please let us know—we’ll do our best to support you.

Note to recruitment agencies: Infinitesima Ltd only works with approved agencies and does not accept unsolicited agency CVs. Please do not submit candidate details in response to this advert, or to any Infinitesima Ltd employees. Infinitesima Ltd is not responsible for any fees related to unsolicited CVs.

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