Public relations firm Henson Consulting is moving its headquarters in April as it plans to double its staff of 25 in the next year, said founder and CEO Kathleen Henson. Henson Consulting signed a seven-year lease for 7,180 square feet in the 23-story office tower at 205 W. Wacker Drive, with an option to add about 4,000 square feet. The firm, founded in 2001, currently has about 3,800 square feet at 61 W. Hubbard St., above the Paris Club. Growth has been spurred by adding new clients, most recently Potbelly Sandwich Works and Mariano’s, Henson said. Henson recently opened an office in Cleveland and is looking to open one in Los Angeles, she said. The firm was represented in the lease by Rich and Jason Schulz, principals at the J Rich Co.