Stelth Ulvang relishes the musical balancing act he has maintained since joining The Lumineers in 2011.

As keyboardist, accordionist and multi-instrumentalist for the folk-pop sensation that emerged in 2012 with the hit “Ho Hey,” Ulvang has played arenas, stadiums and concert halls around the world. Last year, the Denver-based band supported U2 on the North American leg of its “Joshua Tree” tour, and played two shows with Tom Petty and the Heartbreakers before Petty’s death.

Along the way, he’s released two studio albums and two EPs under his own name, including three releases so far this year: the EPs “Greetings from Perpetual Summer,” recorded in South Africa; and “Take Time,” a collection of iPhone demos; and “American Boredom,” the proper follow-up to his 2015 debut album “And, as Always; the Infinite Cosmos.” His three-piece band, including his multi-instrumentalist fiancée, Dorota Szuta, and longtime collaborator Max Barcelow on drums, is supporting Austin, Texas, indie-folk band Wild Child on a tour that plays Volcanic Theatre Pub on Monday.

“I don’t know what it is about me typically, and I don’t think the others (in The Lumineers) share this sentiment, but I would go a little nuts if I didn’t do a little bit of playing with my own stuff in these scenarios,” Ulvang said shortly before taking the stage at Rose Music Hall in Columbia, Missouri. “… I still am playing quite a bit of house shows, and it’s nice seeing almost 100 percent of the audience engaged in everything you’re saying, where the mass of people I see at Lumineers shows — you know that you’re getting them involved, they’re pumped up, they know the songs, the music is upbeat and entertaining. But you can’t see them and you can’t know, like, hey, I’m glad I said this thing that made this person chuckle.”

Ulvang forged an orchestral folk sound heavy with horns and string arrangements on “The Infinite Cosmos,” an album that was recorded in Portland (where Ulvang recently moved) over two years during breaks in The Lumineers’ schedule. He said he hopes to re-create some of this with the seven-piece Wild Child in Bend.

“American Boredom,” again recorded during breaks from The Lumineers over the last three years, is a more rock-based album. Ulvang composed most of the songs on guitar while on the road, leading to the harder-edged sound of tracks such as “Denim” and “Left Side.”

His heavy traveling schedule on his own and with The Lumineers also inspired the album’s title and themes.

“A lot of tunes have this lazy satire about them I think, and suburban life, and I know at times that can feel cliché,” Ulvang said. “… I guess that there’s still this sincerity that comes out that I wanted to capture about it. It’s not as much (screw) the suburbs, but more so like all of us are part of this and we’ve grown through part of this, and now we’re dealing with, I think, the circumstances of our lifestyles now, and trying to live out of a van for three months at a time.”