The short answer is no.
While it is not technically a holy day of obligation, it is a beautiful Catholic Mass to attend. Holy Thursday, part of Holy Week, is one of the most significant and profound celebrations of the Catholic Church. The mass on Holy Thursday, also called the Mass of the Lord's Supper, celebrates the institution of the Eucharist, the source and summit of the Catholic faith. On top of that, it also commemorates the institution of the priesthood. The reenactment of Jesus washing the feet of His disciples by the priest washing the feet of some parishioners celebrates this fact.
Holy Thursday is the beginning of the Paschal Triduum which is a three day period of prayer that closes with the Evening Prayer on Easter Sunday.
The reason it is not a holy day of obligation is because it is only celebrated once per day and so that would make it unreasonable to require Catholics to attend if they have to work during that time.