headquarters u.s. bank centre seattle washington u.s. area served worldwide key people lance josal ceo services architecture ; interior design ; graphic design ; strategic consulting ; real estate strategies ; master planning ; brand experience number of employees 900 2012 website www.callison.com callison was an international architecture firm based in seattle washington . callison was founded by tony callison in 1975 and grew to 900 employees around the world prior to its acquisition by arcadis nv in 2014 . in october 2015 callison was formally merged with another arcadis subsidiary rtkl associates to form callisonrtkl headquartered in baltimore maryland . 1 callison planned and designed retail hospitality mixed use workplace corporate and healthcare projects worldwide . contents 1 corporate 2 awards 3 notable projects 4 references 5 external links corporate edit from its founding in seattle in 1975 the company grew to over 900 employees worldwide with offices across the globe seattle los angeles mexico city dallas scottsdale new york city london dubai beijing shanghai and guangzhou . in august 2014 callison announced it would be acquired by arcadis nv a global design engineering and management consulting firm based in amsterdam . 2 shortly after the acquisition arcadis began marketing callison together with another recent acquisition baltimore based rtkl with a combined callisonrtkl website and press releases . 3 in october 2015 the two firms were formally merged to form callisonrtkl headquartered in baltimore maryland . at the time of the merger the two firms together had together booked 402.4 million in architecture and engineering revenue in the prior year and architectural record ranked the combined firms fifth in the nation . 1 awards edit callison was ranked in 2008 as the number one retail design firm in the world by building design magazine . 4 in 2008 enr ranked callison 12 in the top 100 green design firms . 5 callison was awarded design firm of the year by ddi for 2008 6 in 2013 puget sound business journal named callison the top architecture firm in the puget sound region with a projected revenue of 98.67 million . 7 notable projects edit this section needs additional citations for verification . please help improve this article by adding citations to reliable sources . unsourced material may be challenged and removed . august 2012 learn how and when to remove this template message 8 inorbit hyderabad hyderabad india hongyi plaza shanghai china flatiron crossing mall broomfield colorado the pearl qatar porto arabia doha qatar w hotel seattle washington unitech grande noida india harvey nichols dubai and jakarta boeing world headquarters chicago illinois 2201 westlake seattle washington grand gateway shanghai china 9 sogo osaka japan swedish medical center eastside specialty center issaquah washington hotel terra jackson hole wyoming the bravern bellevue washington harrods white cosmetics hall london england st. charles medical center redmond redmond oregon microsoft campus redmond washington greenbelt 3 manila philippines lotte center hanoi hanoi vietnam nordstrom since 1975 callison has provided the retailer both companies are based in seattle the design for more than 155 new and remodeled stores ; and continues to complete 10 projects on average every year for the company . references edit a b bhatt sanjay 20 october 2015 . callison merges into another architecture firm hq shifts to baltimore . the seattle times . retrieved 8 april 2016 . gonzales angel 21 august 2014 . seattle architecture firm callison bought by dutch giant . the seattle times . retrieved 26 august 2014 . press release 15 january 2015 callisonrtkl projects win rdi awards http www.callisonrtkl.com news callison projects win rdi awards . accessed 8 april 2016 . http emag.digitalpc.co.uk cmpi worldarch08.asp world architecture 100 building design 2008 top green design firms 2008 engineering news record june 23 2008 . design firm of the year display and design ideas september 2 2008 . dead link van bronkhorst eric june 24 2013 . the list top 5 architecture firms in the puget sound area slide show . puget sound business journal . retrieved february 21 2016 . callison.com . callison website . callison . retrieved 7 november 2014 . binder georges 2006 . 101 of the world s tallest buildings . victoria australia the imaging publishing group . pp. 136 137 . isbn 1 86470 173 0 . external links edit official website coordinates 47 36 38 n 122 20 05 w 47.610568 n 122.33475 w 47.610568 ; 122.33475 retrieved from https en.wikipedia.org w index.php title callison & oldid 740423119 categories architecture firms based in washington state companies based in seattlecompanies established in 1975hidden categories all articles with dead external linksarticles with dead external links from may 2012articles needing additional references from august 2012all articles needing additional referencescoordinates not on wikidata navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages add links this page was last modified on 21 september 2016 at 00 11 . text is available under the creative commons attribution sharealike license ; 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