Can neuromuscular release technique...will that help with sciatica pain?if not can you recommend or suggest once and for all what will resolve pain?

It can : These techniques can be helpful anytime the pain is related to tightness in the muscle or nerve tissues. Regular exercise is key to relieving sciatica pain and needs to be a combination of the above techniques, stretching, strengthening and low-impact cardiovascular exercise.

Spine Pain Options: This chronic pain in the distribution as you suggested is the result of an irritated nerve or facet joints or other injury typically in the lumbar spine (low back) which are caused by herniated disks, spinal stenosis or degenerative disc disease, etc requiring further evaluation by a spine specialist and may be candidate for facet injections/radiofrequency ablation and epidural steroid injection.