OMAS originated as an idea in 1997. While initially conceived as O’Brian Muehleisen Architecture Studio, we quickly began assigning various explanations to the acronym, most notably “organizing massive amounts of stuff.” Two years would pass before we formally convened with Work 1: Manifesto. The early Works were primarily studies, explorations and experimentations as we labored during our apprenticeships in typical moonlighting fashion under the simple corporation called Omas Workshop. Once licensed to practice Architecture in late 2006, the studio took to its original name O’Brian Muehleisen Architecture Studio, LLC. In mid-2010, Brian O’Brian made a family move, and expanded the practice across the US-Canada border, establishing a presence in Toronto, Ontario. Forgoing the acronym, the office looked to the latitudes of each city, with New York being at the 41st parallel, and Toronto the 44th.  The two offices were renamed OMAS41, and OMAS44, respectively.  After four years, and on realizing that the focus is always the Work, the practice changed names again to OMAS:WORKS in 2014 with the colon representing the two offices and harkening back to the first corporate name.

WORK 32, a Carriage House in upstate New York, was the first undertaking for OMAS:WORKS in early 2007.  Throughout the evolution of names, the investigation and rigorous attention to the Work has been maintained.  All Work is sequentially organized and below is the full Catalogue of those Works to date.

WORK 1 : Manifesto
WORK 2 : Dog Trot
WORK 3 : Imag(in)e
WORK 4 : Blindwriting
WORK 5 : Infill I
WORK 6 : Blue Red and Grey (a deck in Washington)
WORK 7 : Storm House
WORK 8 : Propaganda
WORK 9 : Glass House
WORK 10 : Klinger Deutschraum
WORK 11 : WTC
WORK 12 : New Milford Mountain Retreat
WORK 13 : Singular Cellular
WORK 14 : Head House Sack House Competition
WORK 15 : Hsu Box
WORK 16 : Martha's Vineyard House
WORK 17 : Montana House Addition
WORK 18 : Park Avenue Apartment I
WORK 19 : Garden Fountain
WORK 20 : Atlantic Records Offices
WORK 21 : True North Dynamics (branding design)
WORK 22 : Tribeca Loft
WORK 23 : Egon Gustav Project
WORK 24 : Place for Trace
WORK 25 : Lumitas
WORK 26 : Master Suite
WORK 27 : Yardley Flower Company
WORK 28 : 963 Lex
WORK 29 : Peep Show
WORK 30 : EMFA
WORK 31 : Other House
WORK 32 : Carriage House
WORK 33 : Park Avenue Apartment II
WORK 34 : Lake House
WORK 35 : Two Desks
WORK 36 : Gym Box
WORK 37 : Broadway Apartment
WORK 38 : Infill II
WORK 39 : Water Room
WORK 40 : MLS
WORK 41 : NY-TO
WORK 42 : Light Well
WORK 43 : Madison Avenue Apartment
WORK 44 : City Carriage House
WORK 45 : Upper Eastside Townhouse
WORK 46 : Seward Park Apartment
WORK 47 : Chelsea Apartment
WORK 48 : Califon House Addition
WORK 49 : Upper West Side Apartment
WORK 50 : Flatiron Apartment
WORK 51 : Sitework
WORK 52 : Table and Bench
WORK 53 : Re
WORK 54 : Order Me Another Something
WORK 55 : Paul Taylor Dance Company
WORK 56 : Museum of Polish History
WORK 57 : 74th Street Apartment
WORK 58 : Fifth Avenue Residence
WORK 59 : West End Apartment
WORK 60 : Union Square Apartment
WORK 61 : 71st Street Residence
WORK 62 : Westhampton Residence
WORK 63 : Newark Visitor's Centre Competition
WORK 64 : Sadler Shops
WORK 65 : Park Avenue Apartment
WORK 66 : Fifth Avenue Apartment
WORK 67 : YAF Competition
WORK 68 : Gramercy Loft
WORK 69 : West End Reserve
WORK 70 : Sunset Park Townhouse
WORK 71 : Fort Charles
WORK 72 : Scooter House I
WORK 73 : Ditmas Park Apartment
WORK 74 : M Evolution
WORK 75 : One Wall
WORK 76 : O Evolition
WORK 77 : Chelsea Loft
WORK 78 : Parkette Toronto
WORK 79 : Tribeca Apartment
WORK 80 : West Side Apartment
WORK 81 : Riverside Apartment
WORK 82 : Townhouse Courtyard
WORK 83 : Through House
WORK 84 : Upper West Side Apartment
WORK 85 : Scarsdale House Interior
WORK 86 : Fifth Avenue Apartment
WORK 87 : AIDS Memorial Competition
WORK 88 : Eastern Millwork
WORK 89 : D Pet Hotel
WORK 90 : Kawagama Lake House
WORK 91 : Bar and Nill
WORK 92 : Greenwich Village Apartment
WORK 93 : Ajax
WORK 94 : Lodge House
WORK 95 : Pop Top House Addition
WORK 96 : Finishing a House on Rice Lake
WORK 97 : Three Baths in Bridgehampton
WORK 98 : Dark House
WORK 99 : Doctor's Office
WORK 100 : 100 WORKS
WORK 101 : Tilt House
WORK 102 : Amagansett Fire
WORK 103 : Land House
WORK 104 : Grace Court Residence
WORK 105 : Hands Creek Pool
WORK 106 : Costa Rica Plantelles
WORK 107 : Mar Vista Gallery
WORK 108 : Bloor West House Addition
WORK 109 : Jean Tweed
WORK 110 : Halton Canopy
WORK 111 : Markham Up
WORK 112 : Skyroom I
WORK 113 : Chelsea Apartment II
WORK 114 : Hockey Rink Renovation
WORK 115 : Oakville Fire Station Addition
WORK 116 : Cambridge Fire Boardroom
WORK 117 : Hudson House
WORK 118 : Mamaroneck Playhouse
WORK 119 : Upper West Side Apartment
WORK 120 : Park Avenue Penthouse
WORK 121 : West End House Addition
WORK 122 : The Four Seasons Residences
WORK 123 : Collective Render
WORK 124 : Greenwich Penthouse
WORK 125 : East End Semi
WORK 126 : North Fitzroy House
WORK 127 : Seward Park Apartment
WORK 128 : Utah Summit
WORK 129 : Ark
WORK 130 : Scooter House II
WORK 131 : Station Six
WORK 132 : CEI Lighting
WORK 133 : Brooklyn Brownstone
WORK 134 : Cobble Hill Townhouse
WORK 135 : Bay of Quinte
WORK 136 : East Village Loft
WORK 137 : North York House
WORK 138 : San Diego House
WORK 139 : New Jersey House Rehab
WORK 140 : Amagansett House
WORK 141 : Artist's Studio
WORK 142 : Summerhill House
WORK 143 : Bridgehampton Lake Cottage
WORK 144 : Water Mill Site Works
WORK 145 : Art and Law
WORK 146 : Upper Eastside Penthouse
WORK 147 : Quogue Beach House
WORK 148 : Chelsea Design Office & Gallery
WORK 149 : Garden Wall
WORK 150 : West End House Addition
WORK 151 : Broadway & Chambers
WORK 152 : Park Avenue Residence
WORK 153 : Skyroom II
WORK 154 : School, House
WORK 155 : Borders Competition
WORK 156 : K3 House
WORK 157 : Under the Dome Competition
WORK 158 : Northport Bay House