all managers who is responsible for vs all managers who are responsible for

Some examples from the web:

• Appointment of a safety manager who is responsible for the implementation and maintenance of an effective SMS;
• In accordance with Directive 2012/34/EU, the infrastructure manager is responsible for publishing the "operating" language used by his personnel in daily operational use.
• In particular, the technical manager is responsible for making decisions on the repair and maintenance of a ship.
• It is the managers who are responsible for the unethical, or incorrect, management of vast amounts of money.
• A link between investment performance and the remuneration of the commercial managers responsible for investment decisions is established.
• This manager responsible for ensuring that activities are separately managed could be the managing director of Crediop.
• the identity of the senior manager responsible for the information processing systems;
• Unfortunately, local government institutions and managers responsible for waste management are failing to draw much attention to such misinformation.
• The infrastructure manager is responsible for the correctness of the data provided for inclusion in the infrastructure register.
• The infrastructure manager is responsible for drawing up the Book of Forms and the forms themselves in its operating language.
• This specialist organisation brings together experienced managers who are responsible for implementing the initiative in their own countries, and I would ask that this oversight be corrected.
• Line managers are responsible for continuous case management.
• The team-leader shall report to the manager responsible for the activity, as defined in point 21.B. (b)(2).
• The managers responsible for the portfolio are remunerated based on the overall return generated by the portfolio.
• and for which the transport manager is responsible
• For example, in some entities, some managers are responsible for different product and service lines worldwide, whereas other managers are responsible for specific geographical areas.
• Railway undertakings and infrastructure managers are each responsible for their part of the railway system.
• The accountable manager shall be responsible for establishing and maintaining an effective management system.
• The Administrative Manager shall be responsible for heading the Office.
• Citadele banka shall appoint the hold separate manager who shall be responsible for overseeing the management of the wealth management business under the supervision of the monitoring trustee.

Some examples from the web:

• It is the managers who are responsible for the unethical, or incorrect, management of vast amounts of money.
• This specialist organisation brings together experienced managers who are responsible for implementing the initiative in their own countries, and I would ask that this oversight be corrected.
• Good managers who are responsible and whose conduct is guided by ethics are central to the balanced decision-making process which leads companies to become competitive.
• Line managers are responsible for continuous case management.
• For example, in some entities, some managers are responsible for different product and service lines worldwide, whereas other managers are responsible for specific geographical areas.
• In accordance with Article 13(4) of Directive 2004/49/EC, railway undertakings and infrastructure managers are responsible for the level of training of the drivers they employ.
• A link between investment performance and the remuneration of the commercial managers responsible for investment decisions is established.
• This manager responsible for ensuring that activities are separately managed could be the managing director of Crediop.
• the identity of the senior manager responsible for the information processing systems;
• Unfortunately, local government institutions and managers responsible for waste management are failing to draw much attention to such misinformation.
• Appointment of a safety manager who is responsible for the implementation and maintenance of an effective SMS;
• The team-leader shall report to the manager responsible for the activity, as defined in point 21.B. (b)(2).
• The managers responsible for the portfolio are remunerated based on the overall return generated by the portfolio.
• Thirdly, they should ensure that managers are responsible for their staff, are given the support that they need and are evaluated on their achievements.
• In accordance with Directive 2012/34/EU, the infrastructure manager is responsible for publishing the "operating" language used by his personnel in daily operational use.
• In particular, the technical manager is responsible for making decisions on the repair and maintenance of a ship.
• Railway undertakings and infrastructure managers are each responsible for their part of the railway system.
• The accountable manager shall be responsible for establishing and maintaining an effective management system.
• The Administrative Manager shall be responsible for heading the Office.
• Citadele banka shall appoint the hold separate manager who shall be responsible for overseeing the management of the wealth management business under the supervision of the monitoring trustee.