He continued doing this for another two years. As he felt he needed challenges he applied to join the Special Forces at the end of 1970. After successfully completing his Basic Commando and attaining the coveted Green Beret, he was posted to X Squadron of the Special Forces. His first operation as a full fledged Commando was in the jungles of the Kinta Forest Reserve in Perak. His Troop Leader was Lieutenant Yap Poh Meng (200516).

This troop was ordered to assist the 4th Ranger’s which was conducting operations in the same area. This troop was tasked to support the 4th Ranger’s unit commanded by Captain Mohana Chandran a/l Velayuthan (200402) who had made contact (clashed) with the enemy (Communist Forces). They were flown in by air from Tambun Camp, in Ipoh. There were ten of them who were dropped off at the vicinity of the contact. They abseiled into the area using ropes from the helicopter. 

Once on the ground they were instructed by Lt. Yap to look for the enemy and also to look out for Captain Chandran’s body, who had been killed in the contact, along with the wounded of 4th Ranger’s. They successfully found the body of Captain Chandran and the wounded of 4th Ranger’s. After that, they were extricated from that area and inserted for another operation in Bukit Condong.

After the operation in Bukit Condong whilst in Tambun camp, they had to deploy to Lasah, an area in the north of Sungei Siput. This was an unforgettable operation for Sigai anak Nawan, as that was the first time ever, he got into grips with the enemy, it was a very fierce fire fight. Two Commandos, who were his close friends died in this fight, they were 19151 Trooper Rasli bin Buang and 20677 Trooper Sharif bin Hadis who died on the way to hospital due to his wounds.

Yankee Squadron under the command of Major Ghazali @ Abdul Rahman bin Ibrahim (12264) was tasked to assist a Ranger and a Royal Malay Battalion, who were on operations in the state of Sarawak. Sigai was actually a member of X Squadron but was attached to No.5 Troop of Y Squadron which was commanded by Captain Hamid bin Kusrin for this operation. 13852 Warrant Officer 2 Johari bin Hj. Mohd Sirat was the Troop Sergeant with the Section Commanders being 14666 Sgt. Selamat bin Hj. Abd Rahman for No.1 Section, 15502 Sgt Nayan bin Tak for No.2 Section and 11292 Sgt Muhamad Taib bin Husaini for No.3 Section. Sigai was in Section No.1 which was under the command of Sergeant Selamat, he was assisted by 928519 Corporal Entabah anak Ubok, 18799 Lance Corporal Mohd Ali was in charge of the support weapons group within the section.