Most recently, Hernandez was creative director at Saatchi & Saatchi L.A. where he led the Platform Design team, which creates and manages Toyota's digital presence. Prior to that, he worked at TBWA\Chiat\Day, and Crispin Porter + Bogusky, where he was digital design director.

Throughout his career, Hernandez worked on clients like Bank of America, Aetna U.S. Healthcare, the U.S. Postal Service, Pepsi, Tostitos, Adidas, Burger King, Microsoft, Volkswagen, Nike and Subaru.

Most recently, he was head of The Exchange at Mindshare, where he ran a team of more than 200 people, planning and buying integrated campaigns across offline and online media.

"We are excited to have someone with his pedigree join our team, his experience across the multimedia marketplace means he is ideally suited to support Posterscope's continued leadership," said Wilson.

Guerrier joins managing director Frances Great and executive creative director Zach Hilder to complete the BBH LA executive team.

"BBH is renowned for its leadership structure — with strategy, creative and account management working side by side," said Great. "With the appointment of Agathe to our senior management team, we're excited to apply the proven success of BBH's global approach to the world of entertainment in LA. Her international experience, including working in multiple BBH offices and for a wide variety of brands, will be a tremendous asset to all of our clients."

He joins the agency, following an 8-year stint on the senior leadership team of Penzeys Spices. Bourgeois began his career as a copywriter in Milwaukee in the late 1980s. He then moved into account management at Cramer-Krasselt and McCann-Erickson. In the late 1990s, he rejoined the predecessor firm to MSK as vice president and director of account management. Over the course of nine years, he was promoted several times, eventually becoming chief operating officer and playing a key role as the agency was acquired by Mortenson.

"This is a return to our firm for Bob. He worked with us on the acquisition of our predecessor agency and helped set the foundation for MSK as it is today," said Chris Mortenson, CEO of MSK. "Bob's extensive experience spanning traditional and digital marketing from both the agency and client sides will help us continue to grow our business and that of our clients."

He more than 25 years of experience at agencies including Hill Holliday, Mullen, and Bronner Slosberg Humphrey (now DigitasLBi). While there, he worked on clients like Bank of America, HSBC, General Motors, AT&T, IBM, Major League Baseball, FedEx, Lever Brothers and the J.M. Smucker Company.

"Andrew has consistently demonstrated a strong commitment not only to the agency but also to our clients and partners," said Ron Bess, CEO of Myelin Communications, which owns Partners & Simons. "In his new role, I am confident Andrew's leadership will help guide Partners & Simons to a higher level of excellence."

Generator Media + Analytics hired Justina Yeboah as communications strategy associate director and Suraj Balani as communications strategy planner.