[13][14] In the United States, Wierson played a key role in the launch of the annual Manova Summit, a large annual event on the global health calendar that brings together leaders from healthcare and retail,[15][16] It has been reported that Wierson played a key behind-the-scenes role as a media advisor to the 2018 campaign of Brazilian presidential candidate Jair Bolsonaro, softening the candidate's message to broaden his appeal in the run-off election.

To date he has won five Emmy awards for his role as the Executive Producer of the nationally syndicated Secrets of New York[32][33][34][35] as well one Emmy for his role as Executive Producer of the feature documentary film "Back Door Channels: The Price of Peace" which featured former U.S. President Jimmy Carter, former Secretary-General of the U.N. Boutros Boutros-Ghali, Dr. Henry Kissinger, the former U.S. Secretary of State and CNN's Wolf Blitzer, among other notables.

"[12] In addition to the TV business, Wierson is also credited with leading a complete overhaul of WNYE 91.5 FM, with new formats for morning and afternoon drive-time programming, re-branding itself as "Radio New York" and in partnership with live coast-to-coast music feeds from Seattle-based alternative rock station KEXP.

[48] The announcement was seen as an aggressive move by the New York City Indie music community, causing broadcaster WFUV to take public on-air swipes at Wierson for having encroached on their market.

New York City Councilwoman Gale Brewer, who at the time represented Manhattan's Upper West Side on the City Council and had oversight over telecommunications and technology (she is now the Manhattan Borough President[51]), regularly criticized the Bloomberg media and communications operation as being "too flashy" with its focus on fashion, celebrity, and other topics she viewed as inconsistent with the mission of the network.

After helping build the station virtually from scratch, Arick oversaw the merger of NYC TV with WNYE-TV and WNYE (FM), creating the largest local media group in New York that now reaches hundreds of thousands of people every day.

NYC TV's 160 New York Emmy nominations and 42 awards serve as a testament to Arick's vision, tenacity, and leadership and to the excellence of the media group he was instrumental in creating.

I have no doubt that Arick's entrepreneurial and creative talents, which helped him achieve great things at NYC TV will serve him well as he rejoins the private sector..."[54] The New York Times later revealed that Wierson had been quietly producing a documentary film starring former U.S. President Jimmy Carter "Back Door Channels: The Price of Peace" which later opened in Monte-Carlo and Abu Dhabi.

[56] In 2011, it was reported that Wierson was leading an effort to open the first large-scale modern department store in Angola to be called Luanda Fashion Center.

[59][60] In the spring of 2018, in the wake of a failed attempt to bring the 2023 World's Fair to Minnesota,[61] it was reported that Wierson, former General Mill's Chief Marketing Officer Mark Addicks, and publicist Kathryn Tunheim joined forces with The Medical Alley Association, The Mayo Clinic, and Walmart to launch The Manova Global Summit on the Future of Health.

[16][62] Wierson began writing for The New York Observer shortly after returning to the United States in 2017,[63] oftentimes sharing his views on recently elected US President Donald Trump and offering insights and comparisons that could be drawn from his time working with his former longtime boss, former New York City Mayor Michael Bloomberg,[64] the wealthiest man to ever hold public elected office in the history of the United States.

[67] Wierson became a regular columnist for CNN in 2019 as speculation began to mount that Bloomberg would be running for president in the 2020 Democratic Party presidential primaries.

"[68]—a meme Bloomberg would use as part of his political messaging once he entered and then dropped out of the presidential race after a disastrous showing on Super Tuesday, 2020.

[69] With the Observer moving to decidedly less political coverage by 2018 due to the outlet being owned by Trump son-in-law Jared Kushner,[70] Wierson began to focus his writing on disruption and innovation in business.

[82][83][84] The network's news anchors often rely on Wierson, who speaks fluent Portuguese and lived for many years in Brazil, to interpret U.S. and global events for Brazilian audiences in terms that they will readily understand.