[3][1] Ounprom is described in her official biography as having risen to the rank of colonel by 2015, and as having "enrolled in the Ratchawallop Police Retainers, the Royal King’s Guards 904".

[3] Before this, Ounprom completed military training in parachuting, royal bodyguarding, and the Thai army's "Combat Qualifying Course in Jungle Warfare".

[7][12][13][14][15] On 30 August 2019, as Sineenat (Sininat or Sinina), she was appointed deputy adviser of a prison reform initiative, "Sharing Happiness And Doing Good With Heart With the Department of Corrections".

[2] On 27 August 2020, the Lat Yao Central Women's Correctional Prison was reportedly closed to visitors for two days,[19] and a Boeing 737 plane from King Rama X's private fleet was dispatched to Bangkok.

[20] According to journalist Andrew MacGregor Marshall, the prison is where she had been held and the events were part of a plan to transport her in secret to Munich where she would join his retinue in quarantine,[21][22] in preparation for a possible future royal pardon and restoration of her titles.