My endorsement is with Ernie Ball Musicman Guitars -  four and five string Sterling and Stingray basses. Thanks to Sterling, Brian, Beth and Derek.
I also use some of my other guitars:
Spector Guitars - My trusty old workhorses; a combination of various NS-2 basses as well as fretless and five string models. Thanks to the inimitable Stuart Spector.
Fernandes Guitars - four, five, piccolo and eight string basses.
I also have an assortment of others including custom Roger Giffin, Wal fretted and fretless, Steinberger, Chapman Stick and Gibson EB0 models.
These days I have to give a shout out to my 6 string guitars, as I am play guitar on may projects including my solo work :-
Electrics - I mainly use my beautiful Gretsch 1959 6120 TLV - which is an orange 1959 Chet Atkins reissue (thanks to Tony Franklin at Fender) and a Telecaster with Samarium pickups, a Fender Custom Shop 1969 Stratocaster, a Music Man "Bone" guitar?? (go figure!) and a 1986 BC Rich ASM given to me by Bernie Rico Sr. (RIP).
Acoustics - I use a Gibson J200 and a Martin D42 (Frampton model). I also have a Tacoma D20 and a 1939 Dobro resonator guitar.
For bass I have been endorsed by Ampeg since 1988. I use Vintage amps - Ampeg SVT2 and SVT3 amp heads with a combination of Ampeg 8x10, 4x10 and 1510 cabs. Thanks Dino Monoxelos!
For Guitar I am use Rivera Amplification  Venus 5 head and cabinet. I also use a Marshall 1974X 218 watt combo for recording and a vintage Fender Tweed Deluxe amp.
I am now officially a ROTOSOUND artist!  Having used their strings from my first days of bass playing I have now ended up coming back home !  I am proud to be playing the greatest bass strings of all time. While fashions come and go, only LEGENDS remain!
(I had been with Dean Markley for many years. I have now parted company with them and look back on a successful relationship during which I was significantly responsible for the Blue Steel string line.)
Other Devices
I am endorsed by and use the amazing  Lectrosonics L-Series for my wireless systems, thanks to Karl WInkler and Kelly Fair.
I am endorsed by EBS and use the Billy Sheehan Custom overdrive pedals - thank you Billy!
I am endorsed by T-REX Effect Pedals. I use the Octavius pedal thanks to Jes Selane.
Sometimes I will use a Sobbat DB-Bass overdriver - totally unique, and Boss Bass Chorus pedal. Sometimes I use a Phaser. I also love the Blackstone Appliances overdrive for guitar and the secret weapon - the Richie Kotzen RK5 from Tech21 - thanks Richie!
Generally I try to keep it simple and down to two effects:-VOLUME and ATTITUDE !!!
I am endorsed by Jim Dunlop for my accessories and custom made picks - I use the Delrin .96mm. Thanks to Julie.
For in ear monitors I use the best out there - The 5 driver w/subwoofer Westone ES50 custom IEMs Thanks to Michelle Dailey!
Recording equipment
For recording I use mainly Digidesign Pro Tools. I have been using this since the late 90's and I actually trained with the folks up at Digidesign's headquarters. Of course in studios I will use whatever is available in mics, consoles and outboard but invariably I will end up going into my pro Tools rig where the project stays until it is mastered. My main rig consists of an HD3 accel core and 16 i/o. I use an abundance of plug ins from various different manufacturers.
I am also endorsed by and use the now defunct Tascam Gigastudio 3.0 system extensively for the ultimate in sampling requirements.