1982 joined WATCH TOWER, and cut his teeth as a front man for what would grow to be massively influential on some of the biggest names in rock music,("technical thrash metal" long before genre specific names such as math metal or progressive metal )- the band opened for most of the band that went on to make successful gold and platinum careers in the genre of heavy metal, some of those are SLAYER, ANTHRAX,TROUBLE, KING DIAMOND and more...
- Bands that cite WATCH TOWER as an influence publicly-DREAM THEATER, CYNIC, DEATH.... Watch Tower continues to be legendary in being publicly proclaimed by press and historians in the genre of metal/rock, as
“Pioneers of Progressive thrash metal".
1985- Watch Tower releases debut-Energetic Disassembly.(Jason Vocals)
1986- Jason is courted by Vinnie Paul Abbott to audition for Pantera. He gets the call twice in one month, due to commitments to Dangerous Toys and other projects,he turns it down both times.
1988- At age 23/24...McMaster leaves Watch Tower -and joined cock rock/hard rock, glam rock band, DANGEROUS TOYS, as front man/song writer. Signed to CBS in 1988 (was a year later bought by Sony music) Columbia records. Two number one MTV videos in 1989 from debut self titled release May 9, 1989 - Dangerous Toys has two gold sales awards on Columbia Records. (Self titled 1989 and 'Hellacious Acres 1991), The debut charts on Billboard.
-Dangerous Toys 1989/90 tours with rock icons The Cult, L.A. Guns, Warrant, and Kix as well as (1990/91) Motorhead, Judas Priest, Metal Church, and Alice Cooper on a Sony music summer tour (Operation Rock N Roll) upon the release of the bands sophomore release, Hellacious Acres.
- Dangerous Toys rides out a successful touring career, but opts out of SONY deal by 1992, for a smaller DIY Independent recording deal with Antones/DMZ label by 1993 through1996 in hometown Austin. The band releases two more studio recordings,1994-"Pissed", and 1995 "The R-tist 4-merly Known as Dangerous Toys", both were re-issued in 1999, as well as a collection of live recordings, "Vitamins and Crashhelmets Tour-Greatest Hits Live" on Deadline/Cleopatra Records, worldwide.(Note- with unapproved wretchedly bad cd art)
-The 1999 live record included 7 tracks taken from Westwood One's "King Biscuit Flower Hour", taken from a concert recorded at the Orpheum Theater in Oct.1989 in Boston.
-1997 Jason joins San Antonio based, The UNION UNDERGROUND, as bass guitarist for a two year stint
-the same year, McMaster joins Austin industrial metal band, TERMINAL 46, on guitar, for a two year stint.
by the end of 1998, McMaster joins forces with a new act, GAHDZILLA MOTOR COMPANY, as bassist/front man-lead singer/songwriter. in order to write and record with GMC, Jason leaves both T-46 and U/U.
1998- Jason Is inducted into the "Texas Music Hall of Fame" at the Austin Chronicle's "Austin Music Awards".
1999- Courted by Dave Snake Sabo from Skid Row to audition as lead vocalist, Snake calls twice, same as the Pantera offer, turns it down for the same reasons.
1999 WATCH TOWER reunites to record a cover song for a tribute to the popular German metal band ACCEPT, for a tribute CD for Nuclear Blast Records (Germany)
1999- forms BROKEN TEETH,with writing partner,Paul Lidel (Dangerous Toys, Dirty Looks) with the release of a studio project produced by Perris Records, soon becomes a full fledged band/ live act. Broken Teeth now has successfully toured the US doing easily over 1000 shows since 2003, with 6 full length releases, 1 EP, as well as two DVD concert videos.
Broken Teeth is currently recording a full length record for release in 2016/17.
(Note- UK,Manchester hardcore punk group with the same name, Broken teeth, refuses to change the name as Broken Teeth own the US Registration (Trademark) of the name, but not internationally because of the cost of attourney fees- Broken Teeth started in 1999, the UK band are losing this race as far as the grandfather clause)
2000-Watchtower is asked to play the popular German metal festival,"Bang Your Head", in Balingen, summer of 2000, with the Scorpions, Saxon, and UDO ( former lead vocalist for ACCEPT) and many other European metal bands that were early influences of Watch Tower.
-The band does pre festival warm up shows in Texas.
2001- McMaster is ordained. Non-Denominational. (Nicknamed, "Pastor McMaster from the Church of Disaster" by fellow band mate, Scott Dalhover- Dangerous Toys)
2003 McMaster hosts his own show on "The Austin Music Network"- THE HARD SHOW- where he made home playing all rock and metal/punk videos for Austin cable channel 15.
-GAHDZILLA MOTOR COMPANY- records 17 songs for two records worth of material, written between 1999 and 2003, the bands demos as well as new updated recordings become a favorite among heavy metal collectors of unreleased demos, etc, underground label executives, and press pundits, as '"the next big thing". described by some publicly in press as "Sci-Fi- Metallica".
GMC dis-bands that same year
2004- Watch Tower is invited to headline the "Headway Festival" in Amstelveen Holland. Show held at P-60 in Amstelveen near Amsterdam in summer 2004.he Band again, does warm up shows in Texas .
2005 McMaster is called by long time friend and drummer for the progressive rock group Dream Theater, Mike Portnoy, to be the vocalist for a Tribute to Canadian band, RUSH, for a one night only performance at the Vic Theater in downtown Chicago, lL.- the show was recorded live and on film, and is available on DVD and CD at www.mikeportnoy.com.
Other musicians included in the project were guitarist/virtuoso - Paul Gilbert (RacerX and Mr. Big), and Sean Malone on bass (Jazz theory instructor at the University of Florida, and bassist for progressive metal group, Cynic)
-Hired as Music Instructor/Show Director at the "School of Rock" Austin chapter, a corporate music school for kids focusing on all types of rock music and music lessons in general. (The School of Rock works with the community to help build confidence and social skills among young people through rock music, with over 50 schools nationwide).
2007 - Joins gothic power metal band IGNITOR as front man and releases "The Spider Queen" on Heavy Artillery records in the USA and Canada, and on Cruz Del Sur records in Europe and other territories.
2009- IGNITOR records-"Year of the Metal Tiger" for MVD Records Worldwide.
2010-McMaster is honored with a star and is inducted into the "South Texas Music Walk of Fame", in hometown Corpus Christi,Tx.
-Ribbon Cutting Ceremony and Concert is set for June 3, 2011.
- New Broken Teeth-"Viva la Rock, Fantastico" is released. Perris Records, Worldwide.
-New Ignitor-"Year of the Metal Tiger",is released.
- New Dangerous Toys- "XX" -20th Year Anniversary Celebration- DVD is released on MVD, Worldwide.
-Joins EVIL UNITED, a group formerly known as" Pitbull Daycare" to write and release thrash/power metal material.
2011- EVIL UNITED Release Self Titled disc on MVD Worldwide
2012- Watchtower is inducted into the Austin Chronicle Texas Music Awards- "Hall of Fame Award".
2013- Ignitor Releases "Mixtape '85", A 70's and 80's Thrash and Classic Metal covers album
Broken Teeth and Evil United release singles for Pre Full Length Downloads.
Broken Teeth-Devil on the Road and Flamethrower...Evil United- Viking Funeral
2014- EVIL UNITED- Honored by Fire-MVD Worldwide
2015- Jason's leather pants from the first Dangerous Toys Tour circa 1989, are displayed in the Texas Musicians Museum, in Irving TX.
Broken Teeth plays the grand opening concert with other Texas Artists.
-Broken Teeth-Bulldozer EP- Texas Metal Underground records/Killingbird records
-Jason records new original Christmas song in the style of Sinatra,Connick Jr.- "Christmas Everybody" available on Itunes.
2016- Dangerous Toys is inducted into the Austin Chronicle Texas Music Awards- "Hall of Fame Award".
-Ignitor-May 6, play at Ragnorokkr- Chicago metal fest with bands from all over the world.The y play new material from a forthcoming release,currently finishing.
-Evil United- Currently record new material.
-Broken Teeth currently recording new full lenth release due out this year.
-Throughout his career, Jason has contributed to many releases paying tribute to popular artists and has done Video Cameos. Also,featured singer/back up singer, percussionist, bassist, too numerous to mention. (Including some of the biggest names in rock in some of these collaborations Some include members of Skidrow, Carmine Appice (Rod Stewart band), George Lynch (Dokken), etc…