Process improvement can have a meaningful impact on how an organization operates. Inefficient workflows, unnecessary handoffs, duplicated work, outdated systems, and unclear ownership can slow execution and create costs that are difficult to see from the top of the organization. The right consulting partner can help identify the root causes of these issues, redesign how work gets done, and support implementation so improvements become part of everyday operations.

There is no single consulting firm that is the right choice for every organization. Some firms are designed for large enterprise transformations, while others specialize in operational improvement, technology-enabled transformation, or more hands-on implementation. Below are five process improvement consulting firms organizations may want to consider when evaluating a partner.

1. Stonehill

Best for: Middle-market companies, private equity-backed organizations, and businesses looking for hands-on process improvement support.

Stonehill helps organizations improve how work gets done by combining process analysis, workflow redesign, organizational design, technology, and change management. Its approach starts with understanding current-state operations and identifying bottlenecks, duplication, unnecessary complexity, and other sources of operational friction. Stonehill then works with clients to develop more effective future-state processes and supports implementation rather than stopping at recommendations. Its process improvement capabilities include process mapping, workflow redesign, Lean and continuous improvement initiatives, SOP development, KPI development, and adoption support. Stonehill also connects process improvement to broader transformation through PMO consulting, project management, AI, and organizational design. This makes the firm particularly suited to organizations that need an experienced consulting team working alongside their existing employees to move improvements from analysis into execution.

2. McKinsey & Company

Best for: Large organizations pursuing enterprise-wide operations and performance transformation.

McKinsey's Operations practice works with organizations on broad performance and operations transformations that can include process improvement, digital capabilities, management practices, organizational capabilities, and change management. Its approach can begin with a diagnostic of the current operating system before moving into future-state design, roadmapping, initiative development, and implementation. McKinsey also emphasizes capability building and employee involvement to help organizations sustain improvements after the initial transformation. The firm's process and operations work is therefore suited to organizations looking at improvement across multiple functions or an entire enterprise rather than a single isolated workflow. For companies undertaking complex, large-scale transformations, McKinsey can bring broad operational and transformation expertise alongside structured implementation methodologies.

3. Bain & Company

Best for: Organizations seeking performance improvement connected to broader business transformation.

Bain & Company provides operations and performance improvement consulting as part of its broader management consulting offering. Its work can address operational performance, cost improvement, supply chain, procurement, digital operations, and organizational capabilities. Bain is also well known for working with private equity investors and portfolio companies, making its operational expertise relevant to businesses where process improvement is connected to value creation and performance goals. The firm's approach generally links operational improvements to broader business objectives rather than treating process redesign as an isolated exercise. Organizations considering Bain may be a good fit when process improvement is part of a larger performance transformation involving multiple functions, strategic priorities, or significant organizational change.

4. Deloitte

Best for: Large organizations combining process improvement with technology and operations transformation.

Deloitte's Operations Transformation capabilities address operational efficiency, process optimization, operating models, technology, and broader business transformation. The firm works with organizations to redesign and modernize operations while considering industry requirements and technology capabilities. Deloitte also has experience with process transformation initiatives that involve redesigning workflows, establishing process ownership and performance measures, and supporting implementation. Its broader consulting capabilities allow process improvement to be connected with technology modernization, workforce transformation, data, and other enterprise initiatives. Deloitte can therefore be a strong option for organizations that need process improvement as part of a larger operational or technology transformation rather than a standalone workflow redesign project.

5. Accenture

Best for: Organizations using technology, automation, and digital transformation to improve business processes.

Accenture combines operations consulting with extensive technology and digital transformation capabilities. Its approach to process improvement can involve redesigning business operations while using technologies such as automation, data, cloud platforms, and AI to change how work is performed. This makes Accenture particularly relevant for organizations where inefficient processes are closely connected to legacy technology or where automation is a major part of the improvement strategy. The firm's scale also allows it to support complex transformation programs across multiple functions and geographies. Organizations considering Accenture may be a strong fit when process improvement needs to be coordinated with a substantial technology modernization or digital transformation initiative.

How to Choose a Process Improvement Consulting Firm

The right process improvement consulting firm depends on what your organization is actually trying to accomplish. A company looking to redesign a few critical workflows may need a different partner than a global enterprise undertaking an organization-wide operations transformation. Before selecting a firm, consider its experience with your industry, the scale of your initiative, its ability to support implementation, and whether its consultants will work directly with the people responsible for the processes.

It is also worth looking beyond the initial process assessment. A strong process improvement initiative should identify root causes, define a practical future state, establish clear ownership, and create a path for implementation and measurement. The goal is not simply to produce better process maps. It is to create meaningful improvements that employees can adopt and the organization can sustain.

Stonehill approaches process improvement as an execution-focused discipline. By working as an extension of the client's team, Stonehill helps organizations understand how work happens today, determine where improvement opportunities exist, redesign processes around business objectives, and support the transition to the new way of working.