Halcrow will be working closely with Record RSS to incorporate natural play into schemes and improve each site through landscape design.
The firm is already working on projects in Somerset and Newcastle, which are being delivered as part of the Government's £235m injection of cash in the Playbuilder and Pathfinder grants programme.
Halcrow principal landscape architect Paul Rabbitts told HW the partnership was part of a drive to raise the consultancy's profile in the play market.
"When people look at Halcrow they think big infrastructure projects, rather than the environment or play," he explained.
"I want to push that and we thought there was the potential for joint working."
The two firms plan to share expertise in their fields to combine knowledge of play planning, design, project management and build.
"They accept they are manufacturers and suppliers and don't necessarily have the full expertise in landscape design," said Rabbitts.
Record RSS sales director Doug Belfield said the relationship with Halcrow would bring significant benefits to the firm.
"We had been looking to work closely with an organisation that not only had the skills and knowledge to add soft landscaping to our existing play space designs but was dedicated and enthusiastic towards play," he explained.
"Paul Rabbitts and his Halcrow team bring all of the above and a very important belief in sustainability within designs which matches our aspirations. As a business, Record RSS with Halcrow can now offer an unparalleled service."