Urgent Wooden Lintel Replacement Project

I am seeking a highly experienced structural engineer to consult on an immediate project. The project involves replacing an aged wooden lintel which is estimated to be more than 20 years old and has visible cracking damage. Its appears to be starting to rot as crumbly in parts. The lintel is (mm) ~1880x100x115 over a ~1550 gap, with ~120 overlap to the left and ~230 overlap to the right. Everything is estimated to nearest 5mm as no straight cuts.

The lintel supports directly the wooden joists from the floor above. My understanding is that replacing with a concrete lintel is not possible as the joists are considered point loading. Joists vary at distance apart but 300 +/- 50 is a good range.

The composite of the wall is solid brick, the outer layer appears to have had an RSJ previously, has been replaced already with a angle steel lintel years ago. The house is a typical 2 story mid terraced 2up 2 down ~100 years old.

Key Responsibilities will include guidance on:
- Safely removing the existing lintel
- Assessing the extent of the damage
- Installing the new lintel

Ideal candidate should have:
- Proven experience in similar tasks
- Skill in woodworking and structural repairs
- Respect for job-site safety norms.
Your expertise will ensure the stability and longevity of the structure on which the lintel rests.

Videos available upon request.