Pareek (25) also led the passing out parade of 67 trainee officers that was reviewed by Union Home Minister Rajnath Singh at the Border Security Force camp at Tekanpur near here.
Pareek, a resident of Rajasthan's Bikaner, is the first woman to join the force in the officer rank after she was selected in the all-India exam conducted by the UPSC in 2014.
The Home Minister himself put the rank stars on the shoulders of Pareek during the piping ceremony.
She will now be posted to command a unit along the India-Pakistan border in Punjab.
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While praising the first woman "field officer" of the 2.5-lakh-strong force, Singh said the Centre has chalked out a new roadmap to strengthen border security and it plans to seal Indian borders with Bangladesh and Pakistan.
He added the BSF has built 73 border outposts, out of 76 such border structures constructed in recent times.
Lauding the force raised in 1965, Singh said BSF has changed the rules of engagement at the international borders and now it is a "known entity" in the neighbouring countries.
"The forces are coming forward with such mechanisms," he said.
He praised the BSF saying it is the only force after the Indian military which operates on land, water and air as it has a dedicated air and water wing apart from foot soldiers.
"BSF is not only the first line of defence but also the first wall of defence," he said.
The trainee officers, who passed out today, have undergone 52-week training in battle craft, intelligence gathering and other border guarding tasks before being commissioned into the force in the entry rank of Assistant Commandant.
During his visit to the Tekanpur camp, Singh also watched a demonstration of PAVA shell firing at the Tear Smoke Unit (TSU) of the force.
The shells were prepared at the TSU and sent to Kashmir Valley for security forces as an alternative to pellet guns to control protests and stone pelters.
The BSF is primarily tasked to guard two of the most sensitive Indian frontiers with Pakistan and Bangladesh while it is extensively deployed for conducting anti-Naxal operations and rendering other duties in the internal security domain.