Being generally familiar with major Hindu sects, I never heard of Vishwaksena till recently. SriVaishnavas like to say that when they worship an elephant-headed God, they are worshiping Vishwaksena or his assistant and not Vinayaka - but is he worshiped by any other Hindus?
Vishvaksena or Vishwaksena, also known as Senai Mudalvar (Sena Mudaliar) and Senadhipathi (all literally "army-chief"), is the commander-in-chief of the army of the Hindu god Vishnu and the gate-keeper and "chamberlain" of Vishnu's abode Vaikuntha.
Answer: "Yes, Vishvaksena is worshipped"
Vishvaksena is worshipped before any ritual or function in some Vaishnava sects. He occupies an important place in "Vaikhanasa and Pancaratra temple traditions", where often temple festivals begin with his worship and procession.
- His worship has been discussed in Kurma Purana , Kalika Purana , Pancharatra text Lakshmi Tantra
- Tirumala Tirupati Devsthanams tradition also worships Vishvaksena, as per Vaikhanasa Agama. In the temple rituals, Sri Vishwaksena is worshipped first.