Senior Design Project Manager

Gaga Muller is a Project Management Consultancy with specific divisions focused on providing Project Management, Cost Management, and Digital services to owner organisation within the construction industry.

With a proven track record working alongside global technology leaders and data centre developers, we combine local expertise with global standards to ensure projects are delivered on time, on budget, and to the highest quality.

At Gaga Muller, we empower people and organisations to build with data.

We are looking for a Senior Design Manager to join Gaga Muller. You will collaborate with experienced, diverse, and passionate teams, fostering a strong social dynamic and collective sense of achievement. This role offers you extensive industry exposure, helping you broaden your skills, open doors to new opportunities, and expand your perspective. We are committed to empowering you, providing real responsibility, and supporting your career growth through mentorship from industry leaders and the tools you need to succeed.

You will also contribute to shaping our business strategy as we continue to grow. At Gaga Muller, building lasting, trusted relationships with our teams and clients is at the core of what we do.

With a market-leading client base and the opportunity to take the lead on strategic commissions and high-profile projects, this is an exciting time to join the business unit and grow a career with Gaga Muller.

Gaga Muller is supporting the delivery of major hyperscale data centre developments in United States.

As the Senior Design Manager
, you will provide strategic leadership for all multidisciplinary design activities on behalf of the client, ensuring Mechanical, Electrical, CSA, Architectural, Structural, and specialist systems are coordinated, compliant, buildable, and aligned with project objectives.

Working closely with Project Directors, Construction Directors, Commercial Leads, Project Controls, BIM teams, Commissioning Managers, Design Consultants, Contractors, and Client Representatives, you will oversee design strategy, programme integration, technical governance, risk management, and stakeholder engagement from concept design through construction, commissioning, and operational handover.

This role offers the opportunity to lead the design delivery of one of the United States' largest mission critical developments while driving best practice in design management across complex international projects.

• Scope & Delivery Management
• Lead and manage the overall design strategy across Mechanical, Electrical, CSA, Architectural, Structural, and specialist disciplines.
• Direct multidisciplinary design activities from concept design through detailed design, construction, commissioning, and final handover.
• Review and approve consultant design deliverables to ensure compliance with client requirements, technical standards, and project objectives.
• Ensure designs are fully coordinated, constructible, maintainable, and operationally efficient.
• Lead value engineering initiatives while maintaining resilience, redundancy, uptime, and operational performance requirements.
• Oversee technical submittals, RFIs, design changes, engineering approvals, and document control processes.
• Ensure design activities support procurement, construction sequencing, commissioning, and operational readiness.

• Act as the senior client-side design representative across all project disciplines.
• Lead multidisciplinary coordination between design consultants, contractors, specialist vendors, commissioning teams, and client representatives.
• Chair executive design reviews, technical workshops, coordination meetings, and client presentations.
• Work closely with BIM Managers to ensure coordinated, clash-free, and information-rich digital models.
• Collaborate with Commercial, Procurement, Construction, Quality, Project Controls, and Commissioning teams to achieve integrated project delivery.
• Provide technical leadership and mentoring to Design Managers and project teams.

• Lead identification, assessment, and mitigation of technical and design-related risks.
• Ensure compliance with client standards, industry regulations, building codes, and mission critical design requirements.
• Review and approve design changes while assessing programme, cost, and operational impacts.
• Oversee implementation of design governance and change management procedures.
• Support project risk workshops and technical assurance reviews.
• Drive continuous improvement across design management processes and technical delivery standards.

• Prepare executive-level reports on design progress, technical risks, programme status, and key project milestones.
• Maintain oversight of design reviews, technical approvals, RFIs, submittals, and design change registers.
• Support project reporting through dashboards, technical summaries, and executive presentations.
• Ensure project documentation…